A rapid underground continuous wall obstacle removal method

Abstract

The present invention discloses a rapid underground continuous wall obstacle removal method, which specifically includes the following steps: cleaning the ground surface, leveling the ground, and hardening the construction ground with concrete; marking the plane position of the rectangular steel pipe sinking pipe on the ground; inserting the rectangular steel pipe, and simultaneously using a crane in combination with soil-taking equipment to remove the soil in the steel pipe and injecting mud; using a crane to hoist in a horizontal high-speed rock crusher and crush the rock; adjusting the height of the rectangular steel pipe and repeating the rock crushing; pulling out the rectangular steel pipe and moving the horizontal position of the steel pipe, and repeating the rock crushing construction; repeating the steps, and after all the obstacle removal is completed, hoisting out the machine and pulling out the rectangular steel pipe; in the present invention, a high-speed drill is used to drive the cutter head to grind the underground continuous wall instead of drilling and coring, which has the advantages of easy slag removal and no machine jam; the solution of retaining the protective layer of the underground continuous wall is used instead of drilling through the underground continuous wall, which has the advantages of good control of cracking and deformation of the existing station structure.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, in particular to a rapid underground continuous wall obstacle clearing method. Background Art

[0002] During track construction, obstacle clearance operations are required. Patent number: CN115653495A discloses an obstacle clearance method that combines vertical sinking of extra-large diameter steel casing with horizontal core drilling. This patent inserts a large-diameter steel casing next to the structure that needs to be cleared. The steel casing has holes, and the size of the holes is reserved according to the size of the obstacle clearance drilling equipment. By adjusting the different positions of the casing, the horizontal drilling rig is used to gradually clear the obstacles. The horizontal drilling rig obstacle clearance plan is as follows: a large-diameter drill rig is hoisted in from the inside of the casing, and the drill rig extends out of the reserved hole to perform coring. After coring is completed, the cutter head carrying the core sample is retracted into the casing, and then the horizontal drill rig and the core sample are hoisted out of the casing as a whole. The casing is then moved up and down, left and right, and the core is gradually removed and cleared.

[0003] The above-mentioned existing patents have the following disadvantages: (1) After the steel casing is rotated underground, it is difficult to locate the hole position. The plane of the hole needs to be parallel to the plane of the obstacle clearance structure (the hole faces the obstacle clearance structure); (2) Mechanical directional drilling is used during the obstacle clearance process. After completion, the wall is penetrated from inside to outside, which may cause soil erosion behind the wall and form a cavity under the existing station. This situation poses a serious threat to the safety of the existing station structure and may cause problems such as cracking, leakage and large deformation, thereby affecting the normal passage of vehicles; (3) The cleared obstacles will enter the tunneling pipe and need to be mechanically withdrawn and then hoisted to the ground for cleaning. This process is cumbersome and time-consuming; (4) Concrete blocks may get stuck in mechanical equipment, thereby forming new obstacles. In order to address the above problems, further in-depth research is needed to optimize the construction method design to ensure construction safety and efficiency. Summary of the Invention

[0004] The main purpose of the present invention is to provide a rapid underground continuous wall obstacle removal method, aiming to solve the existing technical problems.

[0005] To achieve the above object, the present invention provides a rapid underground continuous wall obstacle removal method, which specifically includes the following steps:

[0006] Clean the surface, level the ground, and harden the concrete construction ground;

[0007] Mark the plane position for inserting and driving the rectangular steel pipe on the ground;

[0008] Insert the rectangular steel pipe, and at the same time use the crane combined with the soil taking equipment to remove the soil inside the rectangular steel pipe and inject mud;

[0009] Use a crane to hoist in a horizontal high-speed rock crusher and crush the rock;

[0010] Adjust the height of the rectangular steel pipe and repeat the rock crushing process;

[0011] Pull out the rectangular steel pipe and move it to a horizontal position, and repeat the rock crushing operation;

[0012] Lift out the machine, pull out the steel pipe, and backfill; move the ground horizontally forward 1 meter along the wall that needs to be cleared, repeat the above steps, and after all obstacles are cleared, lift out the machine and pull out the rectangular steel pipe.

[0013] Furthermore, during the process of hoisting the rock crusher, four vertical angle steel limit chutes are set on the rectangular steel pipe, and four horizontal angle steel support brackets are set at the bottom to limit the height and support the rock crusher.

[0014] Furthermore, during the rock crushing process, the rock crushing depth retains the inner protective layer of the underground continuous wall, and mud is pumped to the cutter head of the rock crusher to cool the cutter head and replace the cut debris through the mud. When the second layer of steel bars of the underground continuous wall is broken and the inner protective layer of concrete remains, the rock crushing is stopped, the concrete protective layer is retained, and the rock crusher cutter head is retracted into the rectangular steel pipe.

[0015] Furthermore, the limiting height of the angle steel is the center position of the opening position or half of the height of the rectangular box.

[0016] Furthermore, the insertion depth of the rectangular steel pipe is the center position of the steel pipe opening - 50 cm, that is, the deepest position where the hole needs to be cleaned, and the verticality of the rectangular steel pipe is controlled within a deviation range of 2 cm.

[0017] Furthermore, the rock crushing depth is determined according to the extension length of the cutter head, that is, the extension length = (outer diameter of the steel pipe - steel pipe wall thickness - thickness of the chute angle steel + spacing between the steel pipe and the wall + thickness of the underground continuous wall - thickness of the underground continuous wall protective layer) - length of the rock crusher.

[0018] Furthermore, one side of the opening of the rectangular steel pipe is parallel to the underground continuous wall that needs to be cleared, and the distance between the rectangular steel pipe and the wall is 15 cm.

[0019] Furthermore, the rock crusher includes a high-speed rotor, which is equipped with a power supply device. The power supply device is connected to a transmission rod. The transmission rod passes through an external steel casing and is connected to a high-strength alloy cutter disc. A grouting pipe is provided inside the transmission rod. The grouting pipe is connected to the high-strength alloy cutter disc and the ground at the front and back. A sliding steel plate is provided at the bottom of the high-speed rotor, and the movement of the sliding steel plate is controlled by a retractable excavation recovery cylinder.

[0020] Furthermore, the end of the transmission rod is provided with a reinforcing triangular steel plate connected to the high-strength alloy cutter disc.

[0021] The beneficial effects of the present invention are embodied in:

[0022] In the present invention, a high-speed drill is used to drive a cutter head to grind the underground continuous wall instead of drilling and coring. Due to the characteristics of high-pressure mud for slag replacement, it has the advantage of easy slag cleaning without mechanical jamming. The protective layer of the underground continuous wall is retained instead of drilling through the underground continuous wall. Since retaining the protective layer of the underground continuous wall can prevent soil erosion on the inner side of the underground continuous wall, it has the advantage of good control of cracking and deformation of the existing station structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the obstacle removal method of the present invention;

[0024] Figure 2 This is a schematic diagram of the vertical angle steel limiting chute structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the rock crusher structure construction of the present invention;

[0026] Figure 4 For the present invention Figure 3 Another perspective structural diagram;

[0027] Figure 5 This is a schematic diagram of the grid drilling operation of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the rock crusher of the present invention.

[0029] Description of reference numerals:

[0030] 1. High-speed transfer machine; 2. Power supply device; 3. Transmission rod; 4. High-strength alloy cutterhead; 5. Sliding steel plate; 6. Retractable excavation and recovery cylinder; 7. Grouting pipe; 8. Rectangular steel pipe; 9. Vertical angle steel limit slide; 10. Horizontal angle steel support bracket; 11. Reinforced triangular steel plate. DETAILED DESCRIPTION

[0031] 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-5 The present invention provides a rapid underground continuous wall obstacle removal method, which specifically includes the following steps:

[0033] Clean the surface, level the ground, and harden the concrete construction ground;

[0034] Measure and stake out the planar location for the rectangular steel tube 8. Mark the location on the ground based on the size of the rectangular steel tube (4m in outer diameter). Keep the opening parallel to the diaphragm wall to be cleared. Considering the accuracy and process of the diaphragm wall construction, a 15cm gap is maintained between the rectangular steel tube 8 and the wall.

[0035] Use the extra-large rectangular steel pipe 8 sinking equipment for insertion. At the same time, use the crane in combination with the soil-taking equipment to remove the soil inside the rectangular steel pipe 8 and inject mud. The first is to assist the sinking and the second is to reduce the pressure difference between the inside and outside of the steel pipe. Taking into account the production, processing, hoisting and transportation of rectangular steel pipes, each section of the steel pipe is 4 meters long, and the sections are set up as internal and external socket structures and fixed with bolts. The wall thickness of the steel pipe is 4cm. A circular hole with a diameter of 1.3m is set in the middle of the first opening section as the working space for the obstacle clearance machinery. The depth of steel pipe insertion: the center position of the steel pipe opening - 50cm = the deepest position that needs to be cleaned at this position. The verticality of the steel pipe is controlled within a deviation of 2cm.

[0036] A horizontal high-speed rock crusher is hoisted in using a crane; the cutterhead has a diameter of 1.2 meters. Four vertical angle steel limit chutes 9 are installed inside the steel pipe, adapted to the dimensions of the crusher's rectangular housing, allowing the machine to slide smoothly into place. Four horizontal angle steel support brackets 10 are installed at the bottom to limit the machine's height and support the crusher. The angle steel limit height is set at the center of the opening minus half the height of the rectangular housing.

[0037] Use a horizontal high-speed rock crusher to crush the rock; the crushing depth should retain the inner protective layer of the underground continuous wall. The crushing depth is calculated based on the extension length of the cutterhead, which is (4m outer diameter of steel pipe - steel pipe wall thickness - thickness of chute angle steel + 15cm gap between steel pipe and wall + underground continuous wall thickness - thickness of underground continuous wall protective layer) - total length of the machine.

[0038] Start the motor and rotate the cutterhead at 100 rpm. Simultaneously, advance the jacking cylinder forward (the maximum extension of the jacking cylinder must exceed the required extension length calculated above). The axial force of the jacking cylinder is 10 kN. The jacking speed is controlled to no more than 1 mm / min. Simultaneously, high-quality slurry is pumped into the cutterhead to cool it and displace chippings.

[0039] The cutter disc is equipped with high-strength alloy cutter heads, and the cutter disc opening rate is 40%.

[0040] After the second layer of steel bars in the underground continuous wall is broken, the rock crushing stops when the inner protective layer of concrete remains, preserving the concrete protective layer and preventing soil erosion. At this time, the jacking cylinder retracts, retracting the rock crushing machine cutter head back into the steel pipe.

[0041] 1) Adjust the height of the steel pipe and repeat the rock crushing; the pulling height is 1 meter.

[0042] 2) Pull out the steel pipe and move it horizontally, repeating the rock crushing operation; hoist out the machine, pull out the steel pipe, and backfill; move the ground horizontally forward 1 meter along the wall that needs to be cleared, and repeat steps 2-6.

[0043] After all obstacles are cleared, the machinery is hoisted out, the steel pipes are pulled out, cleaned and neatly stacked, and then transported out of the site.

[0044] In one embodiment, see Figure 6 The rock crusher includes a high-speed rotary machine 1, which is provided with a power supply device 2. The power supply device 2 is connected to a transmission rod 3. The transmission rod 3 passes through an external steel casing and is connected to a high-strength alloy cutter head 4. A grouting pipe 7 is provided inside the transmission rod 3. The grouting pipe 7 is connected to the high-strength alloy cutter head 4 and the ground at the front and back. A sliding steel plate 5 is provided at the bottom of the high-speed rotary machine 1. The sliding steel plate 5 is controlled to move by a retractable excavation recovery cylinder 6. Specifically, the power supply device 2 provides operating power for the high-strength alloy cutter head 4. At the same time, the retractable excavation recovery cylinder 6 is opened to provide excavation power for the high-speed rotary machine 1. Water is passed through the grouting pipe 7 from the ground to the high-strength alloy cutter head 4, cooling and lubricating the cutter head while displacing and discharging the debris generated by the operation.

[0045] Longitudinal repeated operation: After completing one operation, the high-strength alloy cutterhead 4 is recovered by the retractable excavation recovery cylinder 6, the entire device is moved upward (the casing is pulled up), re-fixed and positioned, and the above operation steps are repeated;

[0046] Repeat the horizontal operation: After completing the above-mentioned longitudinal operation once, readjust the position of the external steel sleeve horizontally. After the external steel sleeve is installed, repeat the above-mentioned longitudinal operation steps until all operations are completed and ready to recycle the towing machinery and steel sleeve.

[0047] In one embodiment, a reinforcing triangular steel plate 11 connected to the high-strength alloy cutter disc 4 is provided at the end of the transmission rod 3. This arrangement in this embodiment can improve the connection strength of the high-strength alloy cutter disc 4 and the stability during operation.

[0048] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes in which A and B are satisfied at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist.

[0050] 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rapid underground continuous wall obstacle removal method, characterized by: Specifically include the following steps: Clean the ground, level the ground, and harden the concrete construction ground; Mark the plane position of the rectangular steel pipe (8) on the ground; Insert the rectangular steel pipe, and at the same time use a crane in combination with soil taking equipment to remove the soil inside the rectangular steel pipe (8) and inject slurry; Use a crane to hoist in a horizontal high-speed rock crusher and crush the rock; Adjust the height of the rectangular steel pipe (8) and repeat the rock crushing; Pull out the rectangular steel pipe (8), move the steel pipe to a horizontal position, and repeat the rock crushing operation; Lift out the machine, pull out the steel pipe, and backfill; move forward 1 meter horizontally along the wall that needs to be cleared, repeat the above steps, and after all obstacles are cleared, lift out the machine and pull out the rectangular steel pipe (8).

2. A rapid underground continuous wall obstacle removal method according to claim 1, characterized in that: During the process of hoisting the rock crusher, four vertical angle steel limit chutes (9) are provided on the rectangular steel pipe (8), and four horizontal angle steel support brackets (10) are provided at the bottom to limit the height and support the rock crusher.

3. A rapid underground continuous wall obstacle removal method according to claim 1, characterized in that: During the rock crushing process, the rock crushing depth retains the inner protective layer of the underground continuous wall, and mud is pumped to the cutter head of the rock crusher to cool the cutter head and replace the cut debris through the mud. When the second layer of steel bars of the underground continuous wall is broken and the inner protective layer of concrete remains, the rock crushing is stopped, the concrete protective layer is retained, and the rock crusher cutter head is retracted into the rectangular steel pipe (8).

4. A rapid underground continuous wall obstacle removal method according to claim 2, characterized in that: The limiting height of the angle steel is the center position of the opening position or half of the height of the rectangular box.

5. A rapid underground continuous wall obstacle removal method according to claim 1, characterized in that: The insertion depth of the rectangular steel pipe (8) is the center position of the steel pipe opening - 50 cm, that is, the deepest position where the hole needs to be cleaned. The verticality of the rectangular steel pipe (8) is controlled within a deviation range of 2 cm.

6. A rapid underground continuous wall obstacle removal method according to claim 3, characterized in that: The rock crushing depth is determined according to the extension length of the cutter head, that is, the extension length = (outer diameter of the steel pipe - steel pipe wall thickness - thickness of the chute angle steel + spacing between the steel pipe and the wall + thickness of the underground continuous wall - thickness of the underground continuous wall protective layer) - length of the rock crusher.

7. A rapid underground continuous wall obstacle removal method according to claim 1, characterized in that: One side of the opening of the rectangular steel pipe (8) is parallel to the underground continuous wall that needs to be cleared, and the distance between the rectangular steel pipe (8) and the wall is 15 cm.

8. The rapid underground continuous wall obstacle removal method according to claim 1, characterized in that: The rock crusher comprises a high-speed rotary machine (1), which is provided with a power supply device (2), the power supply device (2) is connected to a transmission rod (3), the transmission rod (3) passes through an external steel casing and is connected to a high-strength alloy cutter head (4), and a grouting pipe (7) is provided inside the transmission rod (3), and the grouting pipe (7) is connected to the high-strength alloy cutter head (4) and the ground at the front and rear. A slidable steel plate (5) is provided at the bottom of the high-speed rotary machine (1), and the slidable steel plate (5) is controlled to move by a retractable excavation recovery cylinder (6).

9. A rapid underground continuous wall obstacle removal method according to claim 8, characterized in that: The end of the transmission rod (3) is provided with a reinforcing triangular steel plate (11) connected to the high-strength alloy cutter disc (4).

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