Method for excavating contaminated soil based on circular boreholes

Abstract

The application discloses a kind of based on circular drilling contaminated soil excavation method, it is related to soil treatment technical field, wherein, a kind of based on circular drilling contaminated soil excavation method includes: according to the longitudinal length of rectangle area determined by circular drill bit diameter;Multiple rectangle areas are arranged side by side in longitudinal direction to cover contaminated area;Each rectangle area is excavated respectively to excavate deep contaminated soil;The technical scheme provided by the application decomposes contaminated area into multiple areas in longitudinal direction, multiple areas are covered by multiple rectangle areas, the longitudinal length of rectangle area is directly related by circular drill bit, so that circular drill bit can more easily drill the soil in rectangle area, then by drilling the soil in each rectangle area, an irregular contaminated area can be completely and without omission covered, and all contaminated soil is ensured to be completely excavated.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, and in particular to a method for excavating contaminated soil based on circular boreholes. Background Technology

[0002] With the acceleration of urbanization in my country, a large number of former industrial sites are being redeveloped and reused. These sites often contain contaminated soil at varying depths, requiring remediation before they can be used safely.

[0003] In existing technologies, rotary drilling rigs are commonly used for construction, but they have the following drawbacks: shape mismatch: rotary drilling rigs produce circular boreholes, while contaminated areas are often polygonal or irregular in shape. How to completely and thoroughly cover an irregular or polygonal area with circular boreholes and ensure that all contaminated soil is removed is a technical challenge. Summary of the Invention

[0004] The main objective of this invention is to propose a method for excavating contaminated soil based on circular boreholes, aiming to provide a method that can completely and thoroughly cover contaminated areas using circular boreholes.

[0005] To achieve the above objectives, the present invention proposes a method for excavating contaminated soil based on a circular borehole, comprising: determining the longitudinal length of a rectangular area according to the diameter of the circular drill bit; arranging multiple rectangular areas side by side in the longitudinal direction to cover the contaminated area; and excavating each rectangular area separately to excavate deep contaminated soil.

[0006] In one embodiment, the step of determining the longitudinal length of the rectangular region based on the width of the circular drill bit includes: The diameter of the circular drill bit is approximately equal to the longitudinal length of the rectangular region.

[0007] In one embodiment, the step of arranging a plurality of said rectangular areas side by side in a longitudinal direction to cover the contaminated area includes: The length of the rectangular area in the horizontal direction is greater than or equal to the length of the local contaminated area corresponding to the rectangular area in the horizontal direction; The sum of the lengths of the plurality of rectangular regions in the longitudinal direction is greater than or equal to the length of the contaminated region in the longitudinal direction.

[0008] In one embodiment, the step of excavating each of the rectangular areas to uncover deeply contaminated soil includes: Divide the rectangular region into at least one square region; Align and set the multiple rectangular regions; The rectangular regions are excavated sequentially along the longitudinal direction.

[0009] In one embodiment, the step of dividing the rectangular region into at least one square region includes: When the horizontal length of the rectangular region is greater than its vertical length, the rectangular region is divided into multiple square regions arranged side by side along the horizontal direction. When the horizontal length of the rectangular region is less than or equal to the vertical length, the rectangular region is divided into a square region.

[0010] In one embodiment, the step of aligning the plurality of rectangular regions includes: The position of the rectangular region is adjusted horizontally such that in two adjacent rectangular regions in the vertical direction, the side length of the square region in one of the rectangular regions is the same as the side length shared by the square regions in the other rectangular region.

[0011] In one embodiment, the step of excavating a plurality of rectangular regions sequentially along a longitudinal direction includes: When the rectangular area to be excavated is the first-level rectangular area in the vertical direction, a drilling strategy is formulated to excavate the corresponding positions of each side length of all the square areas in the rectangular area to be excavated using the circular drill bit. When the rectangular area to be excavated is the Nth level rectangular area in the vertical direction, where N is greater than 1, the set of the side lengths of all the square areas in the Nth level rectangular area is A, the set of the side lengths of all the square areas in the (N-1)th level rectangular area is B, the intersection of set A and set B is C, and the complement of set C relative to the universal set A is D. A drilling strategy is formulated to excavate the position corresponding to each side length in set D using the circular drill bit.

[0012] In one embodiment, the drilling strategy includes: The diameter of the circular drill bit corresponds to the side length of one of the sides of the square region for drilling; The circular drill bit drills holes to form cavities, which are then backfilled with uncontaminated soil. Return to step "The diameter of the circular drill bit corresponds to the side length of one side of the square region for drilling".

[0013] In one embodiment, between the steps "the diameter of the circular drill bit corresponds to the side length of the square area for drilling" and "the circular drill bit drills to form a hole, and the hole is backfilled with uncontaminated soil," the following step is also included: Insert a support cylinder into the hole.

[0014] In one embodiment, the step between "the circular drill bit drills a hole to form a cavity, and the cavity is backfilled with uncontaminated soil" and the step "returning to step 'the diameter of the circular drill bit corresponds to one side length of the square region for drilling'" further includes: Depending on the soil hardness, the support cylinder can be removed or left inside the hole.

[0015] The technical solution of this invention decomposes the contaminated area into multiple regions in the longitudinal direction. Each region is covered by multiple rectangular regions. The longitudinal length of the rectangular regions is directly related to the circular drill bit, which makes it easier for the circular drill bit to drill the soil within the rectangular regions. By drilling the soil within each rectangular region, an irregular contaminated area can be completely and without omission, ensuring that all contaminated soil is removed. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic flowchart of the first embodiment of the contaminated soil excavation method based on circular boreholes provided by the present invention; Figure 2 This is a flowchart illustrating the second embodiment of the contaminated soil excavation method based on circular boreholes provided by the present invention. Figure 3 A schematic flowchart of the third embodiment of the contaminated soil excavation method based on circular boreholes provided by the present invention; Figure 4 This is a flowchart illustrating the fourth embodiment of the contaminated soil excavation method based on circular boreholes provided by the present invention. Figure 5 A schematic flowchart of the fifth embodiment of the contaminated soil excavation method based on circular boreholes provided by the present invention; Figure 6 A schematic flowchart of the sixth embodiment of the contaminated soil excavation method based on circular boreholes provided by the present invention; Figure 7 A schematic flowchart of the seventh embodiment of the contaminated soil excavation method based on circular boreholes provided by the present invention; Figure 8 A schematic flowchart of the eighth embodiment of the contaminated soil excavation method based on circular boreholes provided by the present invention; Figure 9A flowchart illustrating the ninth embodiment of the contaminated soil excavation method based on circular boreholes provided by the present invention; Figure 10 A schematic flowchart of the tenth embodiment of the contaminated soil excavation method based on circular boreholes provided by the present invention; Figure 11 This is a schematic diagram illustrating the implementation of the contaminated soil excavation method based on circular boreholes provided by the present invention.

[0018] Explanation of icon numbers: 1. Contaminated area; 2. Square area; 3. Rectangular area; 4. Drilling location.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] In existing technologies, rotary drilling rigs are commonly used for construction, but they have the following drawbacks: shape mismatch: rotary drilling rigs produce circular boreholes, while contaminated areas are often polygonal or irregular in shape. How to completely and thoroughly cover an irregular or polygonal area with circular boreholes and ensure that all contaminated soil is removed is a technical challenge.

[0024] This invention provides a method for excavating contaminated soil based on circular boreholes, referring to... Figure 1 , Figure 1 This is a schematic flowchart of a first embodiment of a contaminated soil excavation method based on circular boreholes according to the present invention. (See also...) Figure 11 , Figure 11 The four locations of the central borehole are only partially drawn to facilitate viewing and understanding.

[0025] This method for excavating contaminated soil based on circular boreholes includes: Step S1: Determine the longitudinal length of rectangular region 3 based on the diameter of the circular drill bit; Step S2: Arrange multiple rectangular areas 3 side by side in the longitudinal direction to cover the contaminated area 1; Step S3: Excavate each of the rectangular areas 3 to uncover the deep contaminated soil.

[0026] The technical solution of the present invention is as follows: by decomposing the contaminated area 1 into multiple areas in the longitudinal direction, each of the multiple areas is covered by multiple rectangular areas 3. The longitudinal length of the rectangular area 3 is directly related to the circular drill bit, so that the circular drill bit can easily drill out all the soil in the rectangular area 3. Then, by drilling out the soil in each rectangular area 3, an irregular contaminated area 1 can be completely and without omission covered, and all contaminated soil can be cleared.

[0027] In order for a circular borehole to easily cover a rectangular area, the longitudinal length of the directional shape can be less than or equal to the diameter of the circular borehole.

[0028] This invention provides a method for excavating contaminated soil based on circular boreholes, referring to... Figure 2 , Figure 2 This is a schematic flowchart of a second embodiment of a contaminated soil excavation method based on circular boreholes according to the present invention.

[0029] Step S1 includes: Step S11: The diameter of the circular drill bit is equivalent to the longitudinal length of the rectangular region 3.

[0030] Therefore, the vertical dimension of rectangular region 3 is equal to the diameter of the circular drill bit, which allows us to calculate the number of rectangular regions 3 that need to be set.

[0031] This invention provides a method for excavating contaminated soil based on circular boreholes, referring to... Figure 3 , Figure 3 This is a schematic flowchart of the third embodiment of a contaminated soil excavation method based on circular boreholes according to the present invention.

[0032] Step S2 includes: Step S21: The length of the rectangular area 3 in the horizontal direction is greater than or equal to the length of the local contaminated area 1 corresponding to the rectangular area 3 in the horizontal direction; Step S22: The sum of the lengths of the plurality of rectangular regions 3 in the longitudinal direction is greater than or equal to the length of the contaminated region 1 in the longitudinal direction.

[0033] To achieve complete coverage of contaminated area 1, the horizontal length of rectangular area 3 is greater than the horizontal length of the corresponding local contaminated area 1, thus achieving horizontal coverage of contaminated area 1. The sum of the vertical lengths of multiple rectangular areas 3 is greater than or equal to the vertical length of contaminated area 1, thus achieving vertical coverage of contaminated area 1. The length of contaminated area 1 in the vertical direction divided by the diameter of the circular drill bit is calculated as an integer, representing the number of rectangular areas 3. The calculated length is a decimal, rounded up to the nearest integer, representing the number of rectangular areas 3.

[0034] Since the sides of two adjacent rectangular regions 3 lie on the same straight line, when both rectangular regions 3 need to be drilled at the same position on this straight line, they can be drilled only once. To save drilling attempts and improve work efficiency, the drilling positions should overlap as much as possible.

[0035] This invention provides a method for excavating contaminated soil based on circular boreholes, referring to... Figure 4 , Figure 4 This is a schematic flowchart of the fourth embodiment of a contaminated soil excavation method based on circular boreholes according to the present invention.

[0036] Step S3 includes: Step S31: Divide the rectangular region 3 into at least one square region 2; Step S32: Align and set the multiple rectangular regions 3; Step S33: Excavate the multiple rectangular regions 3 sequentially along the longitudinal direction.

[0037] By dividing a rectangular area 3 into at least one square area 2, the rectangular area 3 is aligned longitudinally by the square areas 2 relative to each other. After alignment, multiple rectangular areas 3 are excavated sequentially along the longitudinal direction. At this time, the same drilling position 4 can be drilled only once, thereby improving work efficiency.

[0038] Since the length and width of rectangular area 3 are related to the contaminated area 1, how to divide square area 2 needs to be determined based on the actual situation.

[0039] This invention provides a method for excavating contaminated soil based on circular boreholes, referring to... Figure 5 , Figure 5 This is a flowchart illustrating the fifth embodiment of a method for excavating contaminated soil based on circular boreholes according to the present invention.

[0040] Step S31 includes: Step S311: When the horizontal length of the rectangular region 3 is greater than the vertical length, the rectangular region 3 is divided into multiple square regions 2 arranged side by side in the horizontal direction; Step S312: When the horizontal length of the rectangular region 3 is less than or equal to the vertical length, the rectangular region 3 is divided into a square region 2.

[0041] Generally, when setting up a rectangular area 3, the horizontal length of the rectangular area 3 is an integer multiple of the side length of the square area 2, so that the rectangular area 3 can be divided into one or more square areas 2.

[0042] When excavating the soil in rectangular area 3, a circular drill bit is used to drill a hole at the center of the side length of square area 2. In order to make the drilling positions 4 coincide, that is, to make the side lengths of adjacent square areas 2 in the longitudinal direction coincide (share the side length).

[0043] This invention provides a method for excavating contaminated soil based on circular boreholes, referring to... Figure 6 , Figure 6 This is a schematic flowchart of the sixth embodiment of a contaminated soil excavation method based on circular boreholes according to the present invention.

[0044] Step S32 includes: Step S321: Adjust the position of the rectangular area 3 horizontally so that in two adjacent rectangular areas 3 in the vertical direction, the side length of the square area 2 in one rectangular area 3 is the side length shared by the square area 2 in the other rectangular area 3.

[0045] When adjusting the position of the rectangular area 3 in the horizontal direction, it is also necessary to ensure that the rectangular area 3 covers the corresponding local contaminated area 1 in the horizontal direction.

[0046] To save on the number of drilling operations and to ensure that soil can be extracted from all rectangular areas 3.

[0047] This invention provides a method for excavating contaminated soil based on circular boreholes, referring to... Figure 7 , Figure 7 This is a schematic flowchart of the seventh embodiment of a contaminated soil excavation method based on circular boreholes according to the present invention.

[0048] Step S33 includes: Step S331: When the rectangular area 3 to be excavated is the first-level rectangular area 3 in the vertical direction, a drilling strategy is formulated to excavate the corresponding positions of each side length of all the square areas 2 in the rectangular area 3 to be excavated using the circular drill bit. Step S332: When the rectangular area 3 to be excavated is the Nth level rectangular area 3 in the vertical direction, where N is greater than 1, the set of the side lengths of all the square areas 2 in the Nth level rectangular area 3 is A, the set of the side lengths of all the square areas 2 in the (N-1)th level rectangular area 3 is B, the intersection of set A and set B is C, and the complement of set C relative to the universal set A is D. A drilling strategy is formulated to excavate the position corresponding to each side length in set D using the circular drill bit.

[0049] When drilling the soil in the first-level rectangular area 3, drilling is performed on the positions corresponding to each side length of all square areas 2 in the first-level rectangular area 3; when drilling the soil in the second-level rectangular area 3, drilling is performed on the positions corresponding to the side length of all square areas 2 in the second-level rectangular area 3, except for the positions corresponding to the side length of the area sharing the positive direction with the first-level rectangular area 3; when drilling the soil in the third-level rectangular area 3, drilling is performed on the positions corresponding to the side length of all square areas 2 in the third-level rectangular area 3, except for the positions corresponding to the side length of the area sharing the positive direction with the second-level rectangular area 3... Drilling multiple holes at once to form a larger hole can easily lead to landslides. Therefore, when drilling larger holes directly, slope protection is required. This application addresses the issue of not being able to create slopes when drilling with a circular drill bit.

[0050] This invention provides a method for excavating contaminated soil based on circular boreholes, referring to... Figure 8 , Figure 8 This is a schematic flowchart of the eighth embodiment of a method for excavating contaminated soil based on circular boreholes according to the present invention.

[0051] The drilling strategy includes: Step S33a: The diameter of the circular drill bit corresponds to one side length of the square region 2 for drilling; Step S33c: The circular drill bit drills a hole to form a cavity, and the cavity is backfilled with uncontaminated soil; Step S33e: Return to step "The diameter of the circular drill bit corresponds to the side length of one of the square regions 2 for drilling".

[0052] To avoid creating large holes that could lead to landslides, the holes need to be backfilled after the soil is extracted before drilling a second time.

[0053] Because some areas have soft and sensitive geology, in order to ensure geological stability.

[0054] This invention provides a method for excavating contaminated soil based on circular boreholes, referring to... Figure 9 , Figure 9 This is a flowchart illustrating the ninth embodiment of a method for excavating contaminated soil based on circular boreholes according to the present invention.

[0055] Between step S33a and step S33c, the following is also included: Step S33b: Insert the support cylinder into the hole.

[0056] To prevent landslides after drilling, a support cylinder can be inserted after drilling.

[0057] Depending on the local geological conditions, the support cylinder can be left in the soil and backfilled directly, or the support cylinder can be removed and backfilled.

[0058] This invention provides a method for excavating contaminated soil based on circular boreholes, referring to... Figure 10 , Figure 10 This is a schematic flowchart of the tenth embodiment of a method for excavating contaminated soil based on circular boreholes according to the present invention.

[0059] The steps between S33c and S33e also include: Step S33d: Remove the support cylinder according to the soil hardness or leave the support cylinder in the hole.

[0060] When the geological conditions are relatively stable, remove the support cylinder and then backfill; when the geological conditions are unstable, do not remove the support cylinder and backfill directly.

[0061] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for excavating contaminated soil based on circular boreholes, characterized in that, include: The longitudinal length of the rectangular area is determined based on the diameter of the circular drill bit, wherein the diameter of the circular drill bit is equivalent to the longitudinal length of the rectangular area. Multiple rectangular regions are arranged side by side in a vertical direction to cover the contaminated area; wherein, the step of arranging multiple rectangular regions side by side in a vertical direction to cover the contaminated area includes: the length of the rectangular region in the horizontal direction is greater than or equal to the length of the local contaminated area corresponding to the rectangular region in the horizontal direction; and the sum of the lengths of the multiple rectangular regions in the vertical direction is greater than or equal to the length of the contaminated area in the vertical direction; Each of the rectangular areas is excavated separately to uncover deeply contaminated soil; wherein the step of excavating each of the rectangular areas separately to uncover deeply contaminated soil includes: dividing the rectangular area into at least one square area; aligning multiple rectangular areas; and excavating multiple rectangular areas sequentially along the longitudinal direction. The step of excavating multiple rectangular regions sequentially along the longitudinal direction includes: when the rectangular region to be excavated is the first-level rectangular region in the longitudinal direction, a drilling strategy is formulated to excavate the corresponding position of each side length of all the square regions in the rectangular region to be excavated using the circular drill bit; when the rectangular region to be excavated is the Nth-level rectangular region in the longitudinal direction, where N is greater than 1, the set of side lengths of all the square regions in the Nth-level rectangular region is A, the set of side lengths of all the square regions in the (N-1)th-level rectangular region is B, the intersection of set A and set B is C, and the complement of set C relative to the universal set A is D, a drilling strategy is formulated to excavate the corresponding position of each side length in set D using the circular drill bit. The drilling strategy includes: The circular drill bit is used to drill a hole corresponding to one side length of the square area to form a hole; Insert a support cylinder into the hole; The holes were backfilled with uncontaminated soil; Return to step "The diameter of the circular drill bit corresponds to one side length of the square area to drill a hole to form a cavity".

2. The method for excavating contaminated soil based on circular boreholes as described in claim 1, characterized in that, The step of dividing the rectangular region into at least one square region includes: When the horizontal length of the rectangular region is greater than its vertical length, the rectangular region is divided into multiple square regions arranged side by side along the horizontal direction. When the horizontal length of the rectangular region is less than or equal to the vertical length, the rectangular region is divided into a square region.

3. The method for excavating contaminated soil based on circular boreholes as described in claim 1, characterized in that, The step of aligning the multiple rectangular regions includes: The position of the rectangular region is adjusted horizontally such that in two adjacent rectangular regions in the vertical direction, the side length of the square region in one of the rectangular regions is the same as the side length shared by the square regions in the other rectangular region.

4. The method for excavating contaminated soil based on circular boreholes as described in claim 1, characterized in that, Between the steps "backfilling the hole with uncontaminated soil" and "returning to step 'drilling a hole with the diameter of the circular drill bit corresponding to one side length of the square area to form the hole'", the following is also included: Depending on the soil hardness, the support cylinder can be removed or left inside the hole.

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