A green and environmentally friendly cutting and segmented construction method for removing underground obstacles

Abstract

The present invention relates to the technical field of building construction, and in particular to a green and environmentally friendly construction method for removing underground obstacles by cutting in sections. The construction method adopts cutting in sections to remove underground obstacles, and the specific steps are to suspend a cutting device into a predetermined position of the obstacle, and perform horizontal circumferential cutting on the obstacle; the obstacle is cut into multiple sections from top to bottom or from bottom to top, and after the cutting operation is completed, the device is hoisted out. The method has a high degree of mechanization, does not require personnel to operate in holes, and is safe and reliable. At the same time, the operation efficiency is high, and obstacles and internal steel bars can be accurately removed in sections without large torque to forcefully destroy the obstacles. The energy consumption is low, the disturbance to the construction environment is small, and the method is green and environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a green and environmentally friendly construction method for removing underground obstacles in sections by cutting. Background Art

[0002] In the field of construction, the removal of underground obstacles (mainly structures and piles) is a common but extremely challenging task. Especially under complex and changeable geological conditions, traditional methods of removing underground obstacles have exposed many defects and shortcomings.

[0003] Traditional methods of removing underground obstacles usually rely on a lot of manual operations. Workers need to go deep into the hole (well) to work, which exposes them to extremely high safety risks, such as hole (well) wall collapse, hypoxia, toxic gas leakage, etc., which seriously threaten the lives of workers.

[0004] When it comes to breaking down underground obstacles and internal steel bars, traditional methods often rely on large torque to force them apart. This not only requires construction equipment to have extremely high torque output capabilities, which greatly increases equipment purchase and maintenance costs, but also generates strong vibrations and impacts during the forceful twisting process, causing damage to construction equipment, as well as causing significant disturbances to surrounding geological structures and existing building foundations, and potentially leading to ground subsidence, building cracks and other problems.

[0005] The traditional underground obstacle removal method is difficult to control the location of the underground obstacle segmented destruction and fracture when locating and removing the underground obstacles in sections. Due to the lack of precise positioning and cutting methods, it is often impossible to accurately locate and remove underground obstacles in sections, resulting in uneven removal of underground obstacles in sections, and underground obstacles often get stuck (blocked pipes), which seriously affects the subsequent construction quality and project progress.

[0006] In addition, the traditional method has a low degree of mechanization, and a large amount of manpower is required during the construction process to complete tasks such as carrying materials and operating simple tools. This not only leads to low construction efficiency, but also is prone to human errors, affecting the accuracy and stability of the construction.

[0007] During the construction process, traditional methods will also generate a large amount of waste and noise, causing great pollution and interference to the surrounding environment, which does not meet the requirements of modern society for green and environmentally friendly construction.

[0008] Due to the above reasons, the traditional underground obstacle removal method has serious problems in safety, construction quality, efficiency, cost control and environmental protection, and it is difficult to meet the requirements of modern construction for high efficiency, safety, environmental protection and high quality. Therefore, a new construction method is urgently needed to solve the existing technical problems. Summary of the invention

[0009] The purpose of the present invention is to provide a construction method that is highly mechanized, does not require personnel to operate in holes, is safe and reliable, has high operating efficiency, can accurately point and segment the removal of underground obstacles and internal steel bars, does not require large torque to forcefully twist off underground obstacles, has little disturbance to the construction environment, and is green and environmentally friendly, so as to solve the problems existing in the prior art.

[0010] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a green and environmentally friendly construction method for removing underground obstacles by cutting in sections. The construction method adopts cutting in sections to remove underground obstacles. The specific steps are to suspend the cutting device into the predetermined position of the obstacle and cut the obstacle horizontally. According to the different conditions of the obstacle during construction, the cutting adopts 360° circumferential cutting or cutting at a certain angle. After the cutting is completed, the suspending cutting device rises or descends to continue cutting the obstacle, and the obstacle is cut into multiple sections in turn. After the cutting operation is completed, the device is suspended.

[0011] Furthermore, the method further comprises the following steps: S1 Sink the tube and remove the soil above the obstacle: Measure and lay out the lines, locate the obstacles, use the casing drill to press the steel casing into the soil based on the center of the obstacle, accurately cover the obstacle, form a protective wall for the obstacle, and then use a grab bucket or rotary drilling rig to remove the soil covering the obstacle; S2 Obstacle Top Trim: Use a rotary drilling rig equipped with a special drill bit to trim the top center of the obstacle; S3 Lift and position the guide tube so that it covers the top of the trimmed obstacle, correct the verticality of the guide tube and lock it: S4 Drilling and Coring: Use a rotary drilling machine to drill and coring holes in the obstacle, and then continue to use the rotary drilling machine to drill and coring, so that a core hole of predetermined specifications and depth is formed inside the obstacle; S5 secondary immersed tube, wall protection: After the obstruction is cored and drilled, the casing drill is put in place again to complete the sinking of the pipe to the bottom of the obstruction; S6: The specially made reinforced concrete cutting device A is hoisted into the predetermined position in the core hole of the obstacle to perform cutting operations: The specially made reinforced concrete cutting device A is hoisted into the predetermined position in the core hole of the obstacle to perform horizontal circumferential cutting of the obstacle; the obstacle is cut into multiple sections from top to bottom (or from bottom to top). After the cutting operation is completed, the device is hoisted out; S7: Lift the special mechanical internal expansion connection device B into the core hole of the obstacle to remove it: Use a crawler crane to lower the special mechanical internal expansion connection device B into the core hole of the obstacle, operate the main and auxiliary hooks of the crane to open the movable support frame of the mechanical internal expansion connection device B and connect it with the top support of the single-section obstacle after it is cut off; rotate the casing drilling rig to rotate the steel casing to loosen the soil around the obstacle to reduce friction, and use the crawler crane to lift the special mechanical internal expansion connection device B to pull out all obstacles section by section; S8 backfills the hole left by the obstacle and completes the removal of a single obstacle.

[0012] Furthermore, the trimming of the top of the obstacle in step S2 includes vertical trimming and horizontal trimming.

[0013] Furthermore, the special mechanical internal expansion connection device B includes a main frame of the device, 2-6 retractable movable support frames are arranged below the main frame of the device, the middle part of the main frame of the device is movably covered with a liftable driving component, and a connecting component is installed at the bottom of the driving component. The driving component includes a lifting rod and an adjustment ear, and the connecting component includes a rotating rod, a connecting piece 1 and a connecting piece 2. The number of the rotating rod, the connecting piece 1 and the connecting piece 2 is the same as that of the movable support frame. The connecting piece 2 is fixed at the bottom of the main frame of the device and is rotatably connected to the top of the movable support frame.

[0014] Furthermore, each edge of the top of the main frame of the device is fixed with a movable hanging ear, the adjustment hanging ear is fixed on the top of the lifting rod, and a limiting ring is fixed on the outer wall of the lifting rod, and the limiting ring is located above the main frame of the device.

[0015] Furthermore, the special reinforced concrete cutting device A comprises an upper barrel body and a lower barrel body which are connected to each other, the upper barrel body is distributed with hydraulic support legs, the lower end of the lower barrel body is connected with a hydraulically driven connecting plate, two sections of slide rails are fixedly installed at the lower end of the hydraulically driven connecting plate, a hydraulic motor is arranged on the slide rail, a telescopic rod is arranged behind the hydraulic motor, a hydraulic cylinder is fixedly installed on one side of the telescopic rod, a transmission shaft is installed at the lower part of the hydraulic motor, and a saw disk is installed at the lower end of the transmission shaft.

[0016] Furthermore, the upper barrel body and the lower barrel body are fixedly connected by a connecting plate, and a connecting lifting point is arranged on the top of the upper barrel body, which can be rigidly connected to the drill rod of the ground equipment, and two lifting ears are respectively arranged on both sides of the upper end of the upper barrel body, which can be connected to the crane wire rope or hook.

[0017] 1. Further, the method further comprises the following steps: S1: Steel casing installation: First, use a casing drill to press the steel casing close to the obstacle on one side of the obstacle, use a grab bucket or rotary drilling rig to take soil from the pipe, and simultaneously press the steel casing down to the designated position; S2: Cutting operation on one side of the obstacle: Use a crawler crane to install the cutting device, and hoist the cutting device to a certain distance below the bottom of the steel casing. Use the cutting device to cut one side of the obstacle. After the cutting is completed, gradually pull up the steel casing. Cut the obstacle once every time it is pulled up a certain distance, and backfill the working hole at the same time. After the single-side cutting is completed, hoist out the cutting device, backfill the working hole, and pull out all the steel casing. The cutting device is a special reinforced concrete cutting device A; S3: Other side cutting operations of obstacles: Repeat step S2 to perform cutting operations in multiple directions on the outside of the obstacle until the full-section cutting is completed, and synchronously backfill the working hole after the cutting is completed; S4: Obstacle Clearance: After the cutting operation on the outside of the obstacle is completed, the casing drill is hoisted and aimed at the obstacle, and the steel casing is hoisted and pressed down section by section to cover the obstacle wall. The soil covering the obstacle is removed using a grab bucket or rotary drilling machine. The casing drill is rotated to loosen the soil around the obstacle to reduce frictional resistance. The grab bucket or rotary drilling equipment is used to assist in removing the segmented obstacles. Repeat this step to remove all obstacles section by section. S5: Backfilling operation: After the obstacles are cleared, the steel casing is pulled out and the remaining hole is backfilled simultaneously.

[0018] The beneficial technical effects of the present invention are: (1) This method abandons the traditional manual drilling operation mode, avoids direct exposure of workers to dangerous hole (well) environment, and greatly improves the safety of construction.

[0019] (2) In terms of removing obstacles and internal steel bars, this method no longer relies on strong twisting with high torque. Instead, a rotary drilling machine is used to drill holes in the obstacles and then a cutting machine is used to perform horizontal circumferential cutting of the obstacle concrete and steel bars. This method not only reduces the torque requirements for construction equipment and equipment costs, but also avoids severe disturbances to the surrounding environment during the strong twisting process.

[0020] (3) This method can accurately locate and remove obstacles in sections. Through precise positioning and cutting, obstacles can be cut into multiple sections from top to bottom or from bottom to top, achieving the accuracy of obstacle removal at fixed points, providing a good foundation for subsequent construction and ensuring construction quality and efficiency.

[0021] (4) This method uses an internal expansion (contraction) connector to connect the cut single-section obstacle, and uses a crawler crane to pull out the obstacle section by section, which improves the efficiency and mechanization of obstacle removal. There is no need for personnel to go down the hole (well) to operate, which reduces manpower input, greatly improves construction safety and reduces the possibility of human error.

[0022] (5) This construction method causes little disturbance to the environment during the construction process, generates little waste, and has low noise, meeting the requirements of green and environmentally friendly construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 is a flow chart of the construction method described in Example 1 of the present invention; Figure 2 is a schematic diagram of a pipe sinking in step “S1: sinking the pipe and removing the covering soil above the obstacle” in Example 2 of the present invention; Figure 3 is a schematic diagram of step “S2 obstacle top trimming” in embodiment 2 of the present invention; Figure 4 It is a schematic diagram of step "S3 hoisting and positioning the guide tube, so that the guide tube covers the top of the trimmed obstacle, corrects the verticality of the guide tube and locks it" in Example 2 of the present invention; Figure 5 is a schematic diagram of step “S4 drilling and coring” in Example 2 of the present invention; Figure 6 is a schematic diagram of step “S5 secondary tube immersion and wall protection” in Example 2 of the present invention; Figure 7a~7c is a schematic diagram of step "S6: placing a specially made reinforced concrete cutting device A into a predetermined position in the core hole of an obstacle to perform a cutting operation" in Example 2 of the present invention, Figure 7a A specially made reinforced concrete cutting device A is hoisted, 7b is a diagram showing the reinforced concrete cutting device A entering a predetermined position in the core hole of an obstacle to perform horizontal circumferential cutting on the obstacle, and 7c is a schematic diagram showing the obstacle being cut into multiple sections from top to bottom or from bottom to top; Figure 8 It is a schematic diagram of step "S7: placing a specially made mechanical internal expansion type connection device B into the core hole of the obstacle to perform a removal operation" in Example 2 of the present invention; Fig. 9 is a flow chart of the construction method described in Example 2 of the present invention; Fig.10 This is a schematic diagram of step “S1: steel casing installation” in Example 3 of the present invention, from left to right, using a casing drill to press the steel casing close to the obstacle on one side of the obstacle, and using a grab bucket or a rotary drilling machine to take soil from the pipe; Fig.11This is a schematic diagram of step "S2: cutting operation on one side of the obstacle" in Example 3 of the present invention, from left to right, using a crawler crane to install a cutting device, hanging the cutting device to a certain distance below the bottom of the steel casing, using the cutting device to cut one side of the obstacle, and the effect after cutting one side of the obstacle in sections; Fig.12 It is a schematic diagram of the process of step "S3: completion of cutting operations on the other side of the obstacle and S4: obstacle removal" in Example 3 of the present invention, from left to right, it is a schematic diagram of lifting the steel casing and pressing it down section by section to cover the obstacle wall after the multi-directional cutting operation is completed, and a schematic diagram before and after using a grab bucket or a rotary drilling machine to remove the obstacle; Fig.13 It is the overall structure diagram of the specially made mechanical internal expansion type connection device B in the present invention; Fig.14 It is a structural diagram of the main frame of the specially made mechanical internal expansion type connection device B in the present invention; Fig.15 It is a schematic diagram of the overall structure of the specially made reinforced concrete cutting device A in the present invention; Among them: 1. Main frame of the device; 2. Moving hanging ears; 3. Adjusting hanging ears; 4. Lifting rod; 5. Movable supporting frame; 6. Turntable; 7. Connector 1; 8. Limiting ring; 9. Connector 2; 11 Connection lifting point; 12 Hydraulic support foot; 13 Upper barrel body; 14 Lower barrel body; 15 Slide rail; 16 Saw disc; 17 Hydraulic motor; 18 Transmission shaft; 19 Telescopic rod; 20 Hydraulic cylinder; 21 Hydraulic drive connecting plate; 22 Lifting ears. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] This construction method is carried out for underground obstacles, especially the removal of abandoned pile foundations. In the process of removing underground obstacle areas, two situations are involved. One situation is that the underground obstacle pile body is relatively regular, and the other situation is that the underground obstacle pile body is irregular. The specific detailed construction methods for these two situations are respectively Embodiment 2 and Embodiment 3. Both construction methods use the segmented cutting method to cut the obstacles. Embodiment 1:

[0027] A green and environmentally friendly construction method for removing underground obstacles by cutting in sections. The construction method uses cutting in sections to remove underground obstacles. The specific steps are to suspend a cutting device to enter a predetermined position of the obstacle and cut the obstacle horizontally. According to different obstacle conditions during construction, the cutting adopts 360° circumferential cutting or cutting at a certain angle. After the cutting is completed, the suspending cutting device rises or descends to continue cutting the obstacle, and the obstacle is cut into multiple sections in turn. After the cutting operation is completed, the device is suspended. Embodiment 2:

[0028] like Figure 1-Figure 8 As shown: A green and environmentally friendly cutting and segmented construction method for removing underground obstacles, comprising the following steps: S1 Sink the tube and remove the soil above the obstacle: Measure and lay out the lines, locate the obstacles, use the casing drill to press the steel casing into the soil based on the center of the obstacle, accurately cover the obstacle, form a protective wall for the obstacle, and then use a grab bucket or rotary drilling rig to remove the soil covering the obstacle; S2 Obstacle Top Trim: Use a rotary drilling machine equipped with a special drill bit to trim the top center of the obstacle, including vertical trimming and horizontal trimming; S3 Lift and position the guide tube so that it covers the top of the trimmed obstacle, correct the verticality of the guide tube and lock it: S4 Drilling and Coring: Use a rotary drilling machine to drill and coring holes in the obstacle, and then continue to use the rotary drilling machine to drill and coring, so that a core hole of predetermined specifications and depth is formed inside the obstacle; S5 secondary immersed tube, wall protection: After the obstruction is cored and drilled, the casing drill is put in place again to complete the sinking of the pipe to the bottom of the obstruction; S6: The specially made reinforced concrete cutting device A is hoisted into the predetermined position in the core hole of the obstacle to perform cutting operations: The specially made reinforced concrete cutting device A is hoisted into the predetermined position in the core hole of the obstacle to perform horizontal circumferential cutting of the obstacle (mainly concrete and steel bars); the obstacle is cut into multiple sections from top to bottom or from bottom to top. After the cutting operation is completed, the device is hoisted out; S7: Lift the special mechanical internal expansion connection device B into the core hole of the obstacle to remove it: Use a crawler crane to lower the special mechanical internal expansion connection device B into the core hole of the obstacle, operate the main and auxiliary hooks of the crane to open the movable support frame of the mechanical internal expansion connection device B and connect it with the top support of the single-section obstacle after it is cut off; rotate the casing drilling rig to rotate the steel casing to loosen the soil around the obstacle to reduce friction, and use the crawler crane to lift the special mechanical internal expansion connection device B to pull out the obstacle section by section; S8 backfills the hole left by the obstacle and completes the removal of a single obstacle. Embodiment 3:

[0029] If it is difficult to remove individual obstacles during the construction process, you can also perform multi-point horizontal full-section cutting and destruction at predetermined depths in multiple directions on the outside of the obstacles, and then use a grab bucket or rotary drilling rig to assist in pulling out the obstacles in sections to ensure that all obstacles are removed smoothly. The specific construction method is as follows: like Figure 9-12 As shown in the figure: A green and environmentally friendly cutting and segmented construction method for removing underground obstacles, including the following steps: S1: Steel casing installation: First, use a casing drill to press the steel casing close to the obstacle on one side of the obstacle, use a grab bucket or rotary drilling rig to take soil from the pipe, and simultaneously press the steel casing down to the designated position; S2: Cutting operation on one side of the obstacle: Use a crawler crane to install the cutting device, and hoist the cutting device to a certain distance below the bottom of the steel casing. Use the cutting device to cut one side of the obstacle. After the cutting is completed, gradually pull up the steel casing. Cut the obstacle once every time it is pulled up a certain distance, and backfill the working hole at the same time. After the single-side cutting is completed, hoist out the cutting device, backfill the working hole, and pull out all the steel casing. The cutting device is a special reinforced concrete cutting device A; S3: Other side cutting operations of obstacles: Repeat step S2 to perform cutting operations in multiple directions on the outside of the obstacle until the full-section cutting is completed, and synchronously backfill the working hole after the cutting is completed; S4: Obstacle Clearance: After the cutting operation on the outside of the obstacle is completed, the casing drill is hoisted and aimed at the obstacle, and the steel casing is hoisted and pressed down section by section to cover the obstacle wall. The soil covering the obstacle is removed using a grab bucket or rotary drilling machine. The casing drill is rotated to loosen the soil around the obstacle to reduce frictional resistance. The grab bucket or rotary drilling equipment is used to assist in removing the segmented obstacles. Repeat this step to remove all obstacles section by section. S5: Backfilling operation: After the obstacles are cleared, the steel casing is pulled out and the remaining hole is backfilled simultaneously.

[0030] The special reinforced concrete cutting device A and the special mechanical internal expansion connection device B described in the present invention both adopt a unique structural design independently designed, specifically: like Fig.15 The specially made reinforced concrete cutting device A comprises an upper barrel body 13 and a lower barrel body 14 which are connected to each other, wherein the upper barrel body 13 is provided with hydraulic legs 12, and the lower end of the lower barrel body 14 is connected with a hydraulically driven connecting plate 21, and two sections of slide rails 15 are fixedly installed at the lower end of the hydraulically driven connecting plate 21, and a hydraulic motor 17 is arranged on the slide rail 15, and a telescopic rod 19 is arranged behind the hydraulic motor 17, and a hydraulic cylinder 20 is fixedly installed on one side of the telescopic rod 19, and a transmission shaft 18 is installed at the lower part of the hydraulic motor 17, and a saw disc 16 is installed at the lower end of the transmission shaft 18.

[0031] The upper barrel body 13 and the lower barrel body 14 are fixedly connected by a connecting plate. A connecting hanging point 11 is arranged on the top of the upper barrel body 13, which can be rigidly connected to the drill rod of the ground equipment. Two lifting ears 22 are respectively arranged on both sides of the upper end of the upper barrel body 13, which can be connected to the crane wire rope or hook.

[0032] The specially made reinforced concrete cutting device A is an auxiliary device in the construction process of clearing underground obstacles (structures and piles). Before using this device, use a rotary drilling machine to drill and coring the obstacles (structures and piles). After coring, hoist the reinforced concrete cutting device to the predetermined position in the core hole, and perform a 360° horizontal circumferential cutting of the concrete and steel bars of the obstacles (structures and piles), and cut the obstacles (structures and piles) from top to bottom or from bottom to top into multiple sections, so that subsequent equipment can perform obstacle removal construction. When this device is working, the ground part is assembled, and then the crane is connected to the lifting lug 12 or the rotary drilling machine drill rod is rigidly connected to the lifting point 1, and the reinforced concrete cutting device is hoisted to the predetermined position in the core hole. The hydraulic support legs 2 installed in four directions on the upper barrel 3 are controlled by the ground control equipment to extend, so that it is supported and fixed with the inner wall of the obstacle to be removed by friction. At this time, refer to the attached Figure 2 The hydraulic cylinder 10 controls the telescopic rod 9 to push the hydraulic motor 7 to move on the slide rail 5, so that the saw disk 6 contacts the inner wall of the obstacle to be removed, and the hydraulic motor 7 rotates at high speed. At this time, the transmission shaft 8 drives the saw disk 6 to rotate at high speed to cut the obstacle at that position. After that, the hydraulic drive connecting disk 11 rotates gradually and slightly, driving the saw disk 6 to complete a 360° circumferential cutting or partial cutting at a certain angle.

[0033] The specially designed reinforced concrete cutting device A adopts a fully hydraulic power system with a high degree of mechanization. It does not require personnel to go down the hole for operation and is safe and reliable. The device operates in wells, core holes, holes and other environments. It uses internal expansion (internal support) fixation, and the saw disc can be extended and retracted back and forth and perform horizontal 360° circumferential cutting. It targets underground obstacles (piles, ground-connected walls, structures, etc.); it can accurately locate and segment the obstacles to break the concrete and internal steel bars. It has high operating efficiency, does not require large torque to forcefully twist off the obstacles, has little disturbance to the construction environment, and is green and environmentally friendly.

[0034] like Figure 13-14 As shown, the special mechanical internal expansion connection device B includes a device main frame 1, 2-6 retractable movable support frames 5 are arranged below the device main frame 1, the middle part of the device main frame 1 is movably covered with a liftable driving component, and a connecting component is installed at the bottom of the driving component. The driving component includes a lifting rod 4 and an adjustment ear 3, and the connecting component includes a rotating rod 6, a connecting piece 1 7 and a connecting piece 2 9. The number of the rotating rod 6, the connecting piece 1 7 and the connecting piece 2 9 is the same as that of the movable support frame 5. The connecting piece 2 9 is fixed at the bottom of the device main frame 1 and is rotatably connected to the top of the movable support frame 5.

[0035] A movable lug 2 is fixed to each edge of the top of the device main frame 1 , an adjustment lug 3 is fixed to the top of a lifting rod 4 , a limit ring 8 is fixed on the outer wall of the lifting rod 4 , and the limit ring 8 is located above the device main frame 1 .

[0036] A rotary drilling rig is used to drill and coring obstacles (structures and piles). After coring, the mechanical internal expansion connection device is hoisted to a predetermined position in the core hole. The auxiliary and main hooks of the crane are hooked on the movable hook 2 and the adjustable hook 3 respectively. The lifting rod 4 is pulled up and the four movable support frames 5 are opened by rotating the rotating rod 6 to touch and support the single-section obstacle. The main hook sling is lifted by a crawler crane to move the entire mechanical internal expansion connection device upward. At this time, the external support force of the movable support frame 5 increases with the increase of the hook pulling force, thereby increasing the friction force with the inner wall of the obstacle synchronously, and can effectively connect with the obstacle, thereby lifting and pulling out the obstacle. It has a high degree of mechanization, does not require personnel to operate in the hole, is safe and reliable, is suitable for operations in core holes and removal of underground obstacles, and has little disturbance to the construction environment.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A green and environmentally friendly cutting and segmented construction method for removing underground obstacles, characterized in that: The construction method adopts a cutting-section method to remove underground obstacles. The specific steps are to suspend the cutting device into the predetermined position of the obstacle and cut the obstacle horizontally. Depending on the situation of the obstacle during construction, the cutting adopts 360° circumferential cutting or cutting at a certain angle. After the cutting is completed, the suspending cutting device rises or descends to continue cutting the obstacle, and the obstacle is cut into multiple sections in turn. After the cutting operation is completed, the device is suspended.

2. According to claim 1, a green and environmentally friendly cutting and segmented construction method for removing underground obstacles is characterized in that: The following steps are also included: S1 Sink the tube and remove the soil above the obstacle: Measure and lay out the lines, locate the obstacles, use the casing drill to press the steel casing into the soil based on the center of the obstacle, accurately cover the obstacle, form a protective wall for the obstacle, and then use a grab bucket or rotary drilling rig to remove the soil covering the obstacle; S2 Obstacle Top Trim: Use a rotary drilling rig equipped with a special drill bit to trim the top of the center of the obstacle; S3 Lift and position the guide tube so that it covers the top of the trimmed obstacle, correct the verticality of the guide tube and lock it: S4 Drilling and Coring: Use a rotary drilling machine to drill and coring holes in the obstacle, and then continue to use the rotary drilling machine to drill and coring, so that a core hole of predetermined specifications and depth is formed inside the obstacle; S5 secondary immersed tube, wall protection: After the obstruction is cored and drilled, the casing drill is put in place again to complete the sinking of the pipe to the bottom of the obstruction; S6 The cutting device is hoisted into the predetermined position in the core hole of the obstacle to perform cutting operations: The cutting device is a specially made reinforced concrete cutting device A, which is hoisted into a predetermined position in the core hole of the obstacle to perform horizontal circumferential cutting of the obstacle; the obstacle is cut into multiple sections from top to bottom or from bottom to top, and the device is hoisted out after the cutting operation is completed; S7: Lift the special mechanical internal expansion connection device B into the core hole of the obstacle to remove it: Use a crawler crane to lower the special mechanical internal expansion connection device B into the core hole of the obstacle, operate the main and auxiliary hooks of the crane to open the movable support frame of the mechanical internal expansion connection device B and connect it with the top support of the single-section obstacle after it is cut off; rotate the casing drilling rig to rotate the steel casing to loosen the soil around the obstacle to reduce friction, and use the crawler crane to lift the special mechanical internal expansion connection device B to pull out all obstacles section by section; S8 backfills the hole left by the obstacle and completes the removal of a single obstacle.

3. A green and environmentally friendly construction method for removing underground obstacles by cutting in sections according to claim 2, characterized in that: The trimming of the top of the obstacle in step S2 includes vertical trimming and horizontal trimming.

4. The green and environmentally friendly cutting and segmented construction method for removing underground obstacles according to claim 2 is characterized in that: The specially made mechanical internal expansion connection device B comprises a device main frame (1), 2 to 6 retractable movable support frames (5) are arranged below the device main frame (1), a middle part of the device main frame (1) is movably sleeved with a liftable drive assembly, a connection assembly is installed at the bottom of the drive assembly, the drive assembly comprises a lift rod (4) and an adjustment lug (3), the connection assembly comprises a rotating rod (6), a connecting piece 1 (7) and a connecting piece 2 (9), the number of the rotating rod (6), the connecting piece 1 (7) and the connecting piece 2 (9) is the same as that of the movable support frame (5), and the connecting piece 2 (9) is fixed to the bottom of the device main frame (1) and is rotatably connected to the top of the movable support frame (5).

5. The green and environmentally friendly construction method for removing underground obstacles by cutting in sections according to claim 4 is characterized in that: Each edge of the top of the device main frame (1) is fixed with a movable hanging ear (2), the adjustment hanging ear (3) is fixed on the top of the lifting rod (4), and a limit ring (8) is fixed on the outer wall of the lifting rod (4), and the limit ring (8) is located above the device main frame (1).

6. The green and environmentally friendly cutting and segmented construction method for removing underground obstacles according to claim 2 is characterized in that: The specially made reinforced concrete cutting device A comprises an upper barrel body (13) and a lower barrel body (14) which are connected to each other. The upper barrel body (13) is provided with hydraulic legs (12). The lower end of the lower barrel body (14) is connected with a hydraulically driven connecting plate (21). Two sections of slide rails (15) are fixedly installed at the lower end of the hydraulically driven connecting plate (21). A hydraulic motor (17) is arranged on the slide rail (15). A telescopic rod (19) is arranged behind the hydraulic motor (17). A hydraulic cylinder (20) is fixedly installed on one side of the telescopic rod (19). A transmission shaft (18) is installed at the lower part of the hydraulic motor (17). A saw disc (16) is installed at the lower end of the transmission shaft (18).

7. A green and environmentally friendly cutting and segmented construction method for removing underground obstacles according to claim 6, characterized in that: The upper barrel body (13) and the lower barrel body (14) are fixedly connected via a connecting plate; a connecting lifting point (11) is provided at the top of the upper barrel body (13) and can be rigidly connected to a drill rod of ground equipment; two lifting ears (22) are respectively provided on both sides of the upper end of the upper barrel body (13) and can be connected to a crane wire rope or a hook.

8. The green and environmentally friendly construction method for removing underground obstacles by cutting in sections according to claim 1 is characterized in that: The following steps are also included: S1: Steel casing installation: First, use a casing drill to press the steel casing close to the obstacle on one side of the obstacle, use a grab bucket or rotary drilling rig to take soil from the pipe, and simultaneously press the steel casing down to the designated position; S2: Cutting operation on one side of the obstacle: Use a crawler crane to install the cutting device, and hoist the cutting device to a certain distance below the bottom of the steel casing. Use the cutting device to cut one side of the obstacle. After the cutting is completed, gradually pull up the steel casing. Cut the obstacle once every time it is pulled up a certain distance, and backfill the working hole at the same time. After the single-side cutting is completed, hoist out the cutting device, backfill the working hole, and pull out all the steel casing. The cutting device is a special reinforced concrete cutting device A; S3: Other side cutting operations of obstacles: Repeat step S2 to perform cutting operations in multiple directions on the outside of the obstacle until the full-section cutting is completed, and synchronously backfill the working hole after the cutting is completed; S4: Obstacle Clearance: After the cutting operation on the outside of the obstacle is completed, the casing drill is hoisted and aimed at the obstacle, and the steel casing is hoisted and pressed down section by section to cover the obstacle wall. The soil covering the obstacle is removed using a grab bucket or rotary drilling machine. The casing drill is rotated to loosen the soil around the obstacle to reduce frictional resistance. The grab bucket or rotary drilling equipment is used to assist in removing the segmented obstacles. Repeat this step to remove all obstacles section by section. S5: Backfilling operation: After the obstacles are cleared, the steel casing is pulled out and the remaining hole is backfilled simultaneously.

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