Foundation pit construction wall forming device based on TRD

Abstract

The invention relates to the technical field of TRD construction method cutting box equipment, and discloses a TRD-based foundation pit construction wall forming device which comprises a cutting box, the cutting box is divided into an upper half part and a lower half part, the upper half part of the cutting box comprises a first support, and one side of the bottom end of the first support is in pin joint with a main guide wheel; a hydraulic cylinder set is fixedly installed on the left side of the middle of an inner cavity of the first support, the output end of the hydraulic cylinder set is in pin joint with a second shaft rod, the bottom end of the second shaft rod is in pin joint with an auxiliary guide wheel, and the bottom of the auxiliary guide wheel is in pin joint with the main guide wheel through a first through groove. According to the foundation pit construction wall forming device based on TRD, the auxiliary guide wheels are arranged, so that the cutting tool row rotationally moving to the bottom position can make large-area contact with the ground, the stress of the upper end and the lower end of the cutting box in the longitudinal pushing and cutting process is effectively reduced, the inclination phenomenon is not likely to happen, and the cutting efficiency is improved. And the surface flatness of the formed construction method wall is good.

Description

Technical Field

[0001] This application relates to the technical field of TRD method cutting box equipment, and particularly to a diaphragm wall forming device for foundation pit construction based on TRD. Background Art

[0002] The TRD method is a construction process that uses a cutting box with a cutting chain to insert into the ground and longitudinally cut a groove, while injecting cement slurry into the foundation to form a continuous wall with equal thickness underground. Compared with other methods, the formed diaphragm wall by the TRD method has better continuity and uniformity, a flat surface, and a consistent thickness, and is widely used in various construction projects, underground projects, etc. However, due to the relatively deep insertion of the existing cutting box into the ground, when it longitudinally advances along with the driving device on the ground, the balance of the propulsion force received by the cutting box is poor, making it extremely easy to tilt during the longitudinal advancement process, resulting in a poor flatness of the surface of the formed diaphragm wall. Moreover, if the cutting box tilts, it is very easy to cause the phenomenon of breakage between the cutting box and the driving device, resulting in poor stability and reliability of the existing TRD method cutting box during use and posing a great potential safety hazard.

[0003] Therefore, there is an urgent need for a cutting box component for the TRD method to solve the defects existing in the actual use of the existing TRD method cutting box. Summary of the Invention

[0004] This application proposes a diaphragm wall forming device for foundation pit construction based on TRD, which has the advantages of effectively ensuring the perpendicularity of the cutting box during the longitudinal cutting and grooving process, making it not easy to tilt, having a good flatness of the surface of the formed diaphragm wall, and having high safety and reliability during the operation process. It is used to solve the problem that due to the relatively deep insertion of the existing cutting box into the ground, when it longitudinally advances along with the driving device on the ground, the balance of the propulsion force received by the cutting box is poor, making it extremely easy to tilt during the longitudinal advancement process, resulting in a poor flatness of the surface of the formed diaphragm wall.

[0005] To achieve the above object, this application adopts the following technical solution: A diaphragm wall forming device for foundation pit construction based on TRD includes a cutting box fixedly installed on a driving device. The cutting box is divided into two parts, the upper half and the lower half. The upper and lower parts of the cutting box are spliced together to form a whole, and when inserted into the ground, the next set of cutting boxes can be spliced between the upper half and the lower half until the cutting box reaches the set depth. The upper half of the cutting box includes a first support. One side of the bottom end of the first support is pin-connected with a main guide wheel. In the middle left part of the inner cavity of the first support, a hydraulic cylinder group is fixedly installed. The output end of the hydraulic cylinder group is pin-connected with a second shaft rod, and the bottom end of the second shaft rod is pin-connected with a secondary guide wheel. The bottom of the secondary guide wheel is pin-connected with the main guide wheel through a first through groove. The cutting box in the lower half includes a second bracket fixedly mounted on the driving device, a group of connecting rods are respectively provided inside the four corners of the second bracket, and a steering wheel is movably connected to the top of the second bracket through the connecting rod, and the second bracket and the steering wheel are transmission-connected by an elastic member movably sleeved on the outer surface of the connecting rod, and a cutting knife row for cutting into grooves is provided on the outer surfaces of the main guide wheel, the steering wheel and the auxiliary guide wheel.

[0006] Furthermore, a power device is provided inside the steering wheel to drive the cutting knife row to rotate clockwise, and a sprocket structure is provided on the inner side of the cutting knife row to be transmission-connected to the outer surface of the steering wheel, thereby preventing the power device on the steering wheel from sliding relative to each other during the process of driving the cutting knife row to rotate clockwise to cut into grooves longitudinally.

[0007] Furthermore, the auxiliary guide wheel is provided with two sets of guide wheels distributed upper and lower, and the diameter of the lower guide wheel is the same as the diameter of the main guide wheel, thereby ensuring that when the second shaft rod is parallel to the first shaft rod, the cutting knife row located between the lower guide wheel and the main guide wheel can be in a relatively horizontal state, and effectively increase the friction between it and the soil.

[0008] Furthermore, a limit block is provided between the lower guide wheel and the first through slot, and when the auxiliary guide wheel and the first shaft form an angle of 90°, the limit block prevents the auxiliary guide wheel from continuing to move downward under the thrust of the hydraulic cylinder group.

[0009] Furthermore, a linear motor is fixedly installed on one side of the inner cavity of the first bracket and at the top of the hydraulic cylinder group, and a limiting shaft rod with an inverted "T"-shaped structure is connected to the linear transmission inside the linear motor. At the same time, a second through groove is opened on one side of the top end of the second shaft rod, and a first through groove is opened inside the first shaft rod. Therefore, when the second shaft rod is parallel to the first shaft rod, the limiting shaft rod can be driven downward by the linear motor, and when the bottom end of the limiting shaft rod moves to the bottom end of the first shaft rod, the limiting shaft rod is driven to rotate by degrees, so as to utilize the limiting shaft rod to lock the second shaft rod and the first shaft rod in a parallel state.

[0010] Furthermore, the first through groove and the second through groove are set to an elliptical structure with the same cross-section as the limiting shaft rod, which can allow the limiting shaft rod with an inverted "T" shape to pass through. At the same time, when the limiting shaft rod rotates at degrees, the first shaft rod and the second shaft rod can be locked.

[0011] Furthermore, a pressure sensor is provided on one side of the bottom end of the second shaft, and when it contacts one side of the top end of the first through slot, a set of feedback signals is generated to trigger the linear motor, thereby forming an automatic control system to adjust the shape of the cutting knife row on the cutting box.

[0012] The beneficial effects of the present invention are as follows: A diaphragm wall construction device for foundation pit construction based on TRD provided by the present application. Regarding the setting of the auxiliary guide wheels, after the cutting box is inserted to a preset depth underground, the auxiliary guide wheels can be forced to move downward by triggering the hydraulic cylinder group until the first through groove and the second shaft rod are in a parallel state. Furthermore, the cutting tool row that rotates and moves to the bottom position can form a large-area contact with the ground, and when the cutting tool row rotates to cut the soil, it can form a longitudinal push at the bottom end of the first support, so as to effectively balance the forces on the upper and lower ends of the cutting box during longitudinal pushing and cutting, making it not prone to tilting, and making the surface of the formed diaphragm wall have better flatness, and having higher safety and reliability during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings: Figure 1 It is a schematic structural diagram of the lower half of the cutting box of the present invention; Figure 2 It is a schematic structural diagram of the upper half of the cutting box of the present invention; Figure 3 It is a front view of the lower half of the cutting box of the present invention; Figure 4 It is a schematic structural diagram of the first support and the structures thereon of the present invention; Figure 5 It is a side view of the first support and the structures thereon of the present invention; Figure 6 It is an installation schematic diagram of the limiting shaft rod of the present invention.

[0014] In the figure: 1 - first support, 2 - main guide wheel, 3 - auxiliary guide wheel, 4 - cutting tool row, 5 - second support, 6 - connecting rod, 7 - elastic member, 8 - steering wheel, 9 - first shaft rod, 10 - first through groove, 11 - second shaft rod, 12 - second through groove, 13 - hydraulic cylinder group, 14 - linear motor, 15 - limiting shaft rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than 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 efforts belong to the scope of protection of the present invention.

[0016] A TRD-based foundation pit construction wall forming device includes a cutting box fixedly mounted on a driving device, and the cutting box is divided into two parts, an upper half and a lower half. The upper and lower cutting boxes are spliced together to form a shape, and when inserted into the ground, the next set of cutting boxes can be spliced between the upper and lower halves until the cutting box reaches a set depth, such as Figure 1 、 Figure 4 As shown, the upper half of the cutting box includes a first bracket 1, a main guide wheel 2 is pinned to one side of the bottom end of the first bracket 1, and a hydraulic cylinder group 13 is fixedly installed on the left side of the middle part of the inner cavity of the first bracket 1. The output end of the hydraulic cylinder group 13 is pinned to a second shaft 11, and the bottom end of the second shaft 11 is pinned to an auxiliary guide wheel 3, and the bottom of the auxiliary guide wheel 3 is pinned to the main guide wheel 2 through a first through slot 10; like Figure 2 As shown, the lower half of the cutting box includes a second bracket 5 fixedly mounted on the driving device, a group of connecting rods 6 are respectively provided inside the four corners of the second bracket 5, and a steering wheel 8 is movably connected to the top of the second bracket 5 through the connecting rods 6. The second bracket 5 and the steering wheel 8 are connected to each other through an elastic member 7 movably sleeved on the outer surface of the connecting rod 6. A cutting knife row 4 for cutting grooves is provided on the outer surfaces of the main wheel 2, the steering wheel 8 and the auxiliary guide wheel 3; Among them, regarding the arrangement of the secondary guide wheel 3 and the structure thereon, when the cutting box is inserted to a preset depth underground, the secondary guide wheel 3 can be forced to move downward by triggering the hydraulic cylinder group 13 until the first through groove 10 and the second shaft rod 11 are parallel to each other, thereby allowing the cutting knife row 4 that has rotated and moved to the bottom position to form a larger area of contact with the ground, and when the cutting knife row 4 rotates to cut the soil, a longitudinal propulsion can be formed at the bottom end of the first bracket 1, so as to effectively reduce the force on the upper and lower ends of the cutting box during the longitudinal propulsion and cutting, making it less likely to tilt; At the same time, under the action of the cutting knife row 4, the steering wheel 8 can be driven to move downward to compress the elastic part 7. Then, when the cutting knife row 4 is deformed, the elastic part 7 can be used to balance the tension of the cutting knife row 4, so that it will not be tightened due to the downward movement of the auxiliary guide wheel 3 and will not break during the process of longitudinal cutting into grooves.

[0017] like Figure 2 、 Figure 3 As shown, in the present technical solution, a power device for driving the cutting knife row 4 to rotate clockwise is provided inside the steering wheel 8, and a sprocket structure is provided on the inner side surface of the cutting knife row 4 to be transmission-connected with the outer surface of the steering wheel 8, thereby preventing the power device on the steering wheel 8 from causing relative sliding between the cutting knife row 4 and the steering wheel 8 during the process of driving the cutting knife row 4 to rotate clockwise to cut into grooves longitudinally.

[0018] like Figure 4As shown, in the present technical solution, two sets of guide wheels are provided on the auxiliary guide wheel 3, and the diameter of the lower guide wheel is the same as the diameter of the main guide wheel 2, thereby ensuring that when the second shaft 11 is parallel to the first shaft 9, the cutting knife row 4 located between the lower guide wheel and the main guide wheel 2 can be in a relatively horizontal state, and effectively increase the friction between it and the soil.

[0019] In this technical solution, a limit block is provided between the lower guide wheel and the first through groove 10, and when the auxiliary guide wheel 3 forms a 90° angle with the first shaft 9, the limit block prevents the auxiliary guide wheel 3 from continuing to move downward under the thrust of the hydraulic cylinder group 13.

[0020] like Figure 4 、 Figure 5 as well as Figure 6 As shown, in the present technical solution, a linear motor 14 is fixedly installed on one side of the inner cavity of the first bracket 1 and on the top of the hydraulic cylinder group 13, and a limiting shaft 15 with an inverted "T"-shaped structure is connected to the internal linear transmission of the linear motor 14. At the same time, a second through groove 12 is opened on one side of the top end of the second shaft 11, and a first through groove 10 is opened inside the first shaft 9. Then, when the second shaft 11 is parallel to the first shaft 9, the limiting shaft 15 can be driven by the linear motor 14 to move downward, and when the bottom end of the limiting shaft 15 moves to the bottom end of the first shaft 9, it drives the limiting shaft 15 to rotate 90°, so as to utilize the limiting shaft 15 to lock the second shaft 11 and the first shaft 9 in a parallel state.

[0021] like Figure 4 As shown, in the present technical solution, the first through groove 10 and the second through groove 12 are set to an elliptical structure with the same cross-section as the limiting shaft 15, which can allow the limiting shaft 15 with an inverted "T"-shaped structure to pass through. At the same time, when the limiting shaft 15 rotates 90°, the first shaft 9 and the second shaft 11 can be locked.

[0022] In this technical solution, a pressure sensor is provided on one side of the bottom end of the second shaft 11, and when it contacts one side of the top end of the first through slot 10, a set of feedback signals is generated to trigger the linear motor 14, thereby forming an automatic control system to adjust the shape of the cutting knife row 4 on the cutting box.

[0023] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A TRD-based foundation pit wall construction device, comprising a cutting box fixedly mounted on a drive device, wherein the cutting box is divided into an upper half and a lower half, and the upper and lower cutting boxes are spliced together to form a shape, characterized by: The cutting box in the upper part includes a first bracket (1), a main guide wheel (2) is pinned to one side of the bottom end of the first bracket (1), and a hydraulic cylinder group (13) is fixedly installed on the left side of the middle part of the inner cavity of the first bracket (1), the output end of the hydraulic cylinder group (13) is pinned to the second shaft (11), and the bottom end of the second shaft (11) is pinned to the auxiliary guide wheel (3), and the bottom of the auxiliary guide wheel (3) is pinned to the main guide wheel (2) through the first through groove (10); The cutting box in the lower half comprises a second bracket (5) fixedly mounted on the driving device, a group of connecting rods (6) are respectively provided inside the four corners of the second bracket (5), and a steering wheel (8) is movably connected to the top of the second bracket (5) through the connecting rod (6), and the second bracket (5) and the steering wheel (8) are connected to each other through an elastic member (7) movably sleeved on the outer surface of the connecting rod (6), and a cutting knife row (4) is provided on the outer surfaces of the main wheel (2), the steering wheel (8) and the auxiliary guide wheel (3).

2. The diaphragm wall construction device for foundation pit construction based on TRD according to claim 1, characterized in that A power device for driving the cutting blade row (4) to rotate clockwise is provided inside the steering wheel (8), and a sprocket structure is provided on the inner side of the cutting blade row (4) and is transmission-connected to the outer surface of the steering wheel (8).

3. The diaphragm wall forming device for foundation pit construction based on TRD according to claim 2, characterized in that, The auxiliary guide wheel (3) is provided with two sets of guide wheels distributed upper and lower, and the diameter of the lower guide wheel is the same as the diameter of the main guide wheel (2).

4. The diaphragm wall construction device for foundation pit construction based on TRD according to claim 3, characterized in that, A limit block is provided between the lower guide wheel and the first through slot (10), and when the auxiliary guide wheel (3) and the first shaft (9) form an angle of 90°, the limit block prevents the auxiliary guide wheel (3) from continuing to move downward under the thrust of the hydraulic cylinder group (13).

5. The diaphragm wall forming device for foundation pit construction based on TRD according to claim 1, wherein, A linear motor (14) is fixedly mounted on one side of the inner cavity of the first bracket (1) and located on the top of the hydraulic cylinder group (13), and a limiting shaft (15) with an inverted "T"-shaped structure is connected to the linear transmission inside the linear motor (14). At the same time, a second through groove (12) is opened on one side of the top end of the second shaft (11), and a first through groove (10) is opened inside the first shaft (9).

6. The diaphragm wall construction device for foundation pit construction based on TRD according to claim 5, characterized in that, The first through groove (10) and the second through groove (12) are configured as elliptical structures having the same cross-section as the limiting shaft (15).

7. The diaphragm wall construction device for foundation pit construction based on TRD according to claim 6, wherein, A pressure sensor is provided on one side of the bottom end of the second shaft (11), and when the second shaft (11) contacts one side of the top end of the first through slot (10), a set of feedback signals is generated to trigger the linear motor (14).

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