Foundation pit supporting structure for foundation pit excavation

Abstract

The invention belongs to the technical field of foundation pit supporting, and discloses a foundation pit supporting structure for foundation pit excavation, which comprises an excavator body, a movable soil collecting mechanism is arranged between an excavator bucket of the excavator body and a crawler belt, and the soil collecting mechanism comprises a soil collecting frame, a soil breaking roller and a driving motor. Through the synergistic effect of the soil collecting mechanism, the soil moving mechanism, the mixing mechanism and the supporting mechanism, synchronous excavation and supporting of the foundation pit are achieved, the side wall of the foundation pit is refilled with excavated soil to form a supporting wall, cement slurry is injected through the mixing mechanism to reinforce a soil body, and therefore the problems existing in a traditional method are solved; therefore, the method has the advantages of improving the engineering quality, reducing the risk, saving the cost and conforming to environment-friendly sustainable development.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit support, in particular to a foundation pit support structure for foundation pit excavation. Background Art

[0002] Foundation pit support is a measure of support, reinforcement and protection for the side walls of the foundation pit and the surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. During the excavation process of the foundation pit, as the depth of the foundation pit continues to increase, in order to avoid the collapse of the foundation pit edge, the foundation pit edge needs to be supported.

[0003] During the foundation pit excavation process, since traditional foundation pit excavation and foundation pit support are carried out in steps and cannot be carried out simultaneously, the stability of the foundation pit project may be affected, and there is a risk of collapse and landslide, especially before the support structure has been installed.

[0004] For this purpose, we propose a foundation pit supporting structure for foundation pit excavation. Summary of the invention

[0005] In order to solve the problems raised in the above-mentioned background technology, the present invention provides a foundation pit support structure for foundation pit excavation, which has the advantages of simultaneous foundation pit excavation and support, using the excavated soil to refill the side walls of the foundation pit to form a supporting wall, and using a mixing mechanism to inject cement slurry to reinforce the soil, thereby solving the problems existing in the traditional method, and further having the advantages of improving project quality, reducing risks, saving costs and complying with environmental protection and sustainable development.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a foundation pit support structure for foundation pit excavation, comprising an excavator body, a movable soil collecting mechanism is arranged between the bucket of the excavator body and the crawler, the soil collecting mechanism comprises a soil collecting frame, a soil breaking roller and a driving motor, the bucket of the excavator body collects soil generated during the foundation pit excavation process by using the soil collecting frame of the soil collecting mechanism, and at the same time, uses the driving motor to drive the soil breaking roller to squeeze and crush the collected soil; The discharge port of the soil collecting frame is provided with a movable soil transporting mechanism, and the soil transporting mechanism is located below the operating room of the excavator body, and the soil transporting mechanism includes a bevel gear set, a first transmission gear set and a conveyor belt. When the soil collecting mechanism moves, the conveyor belt is driven to transport the soil crushed by the soil collecting mechanism through the meshing of the bevel gear set and the first transmission gear set; The discharge port of the soil transport mechanism is provided with a mixing mechanism, and the mixing mechanism is located on the right side of the operating room shell of the excavator body. The mixing mechanism includes a mixing box, a second transmission gear set, a spiral blade and a material injection port. The soil transport mechanism transports the crushed soil to the inside of the mixing box, and at the same time, communicates with the feed pipe of the external mud pump through the material injection port, and drives the soil flowing into the mixing box to mix with the cement slurry along the spiral curve of the spiral blade to form a mixed soil body through the cooperation of the second transmission gear set and the spiral blade; The discharge port of the mixing mechanism is provided with a movable supporting mechanism, which includes a shaping template and a connecting pipe, and the mixed soil is filled into the cavity of the shaping template by means of the connecting pipe, and a supporting wall is formed on the side wall of the foundation pit, so as to realize the supporting action on the side wall of the foundation pit; It also includes a visual interface, a processing module and a control terminal of the excavator body, among which: According to the construction requirements, the operator inputs the relevant parameters of the foundation pit side wall in the editing window of the visual interface, and sends the input parameter data to the processing module. Based on the input parameter data, the displacement distance of the forming template from the vertical to the inclined state is calculated, and the control terminal of the excavator body forms a control instruction to control the arc cylinder installed above the mixing box to extend, drive the forming template of the support mechanism to rotate in an arc, adjust the angle of the forming template of the support mechanism, and form a support wall that meets the construction requirements.

[0007] Preferably, the X-frame of the excavator body and the right side surface of the soil collecting frame are both rotatably connected with a mounting frame, the two ends of the soil-breaking roller are respectively rotatably connected with the front inner wall and the rear inner wall of the soil collecting frame, and the multiple soil-breaking rollers are distributed in a linear array inside the soil collecting frame, and the front ends of the multiple soil-breaking rollers all penetrate the front inner wall of the soil collecting frame and extend to the front of the soil collecting frame, and the soil collecting mechanism also includes a motor mounting base fixedly connected to the front of the soil collecting frame.

[0008] Preferably, the driving motor is fixedly mounted on the inner wall of the motor mounting seat, the output shaft of the driving motor is fixedly connected to the front end of one of the soil-breaking rollers located on the front side of the soil collecting frame through a coupling, the adjacent soil-breaking rollers are externally meshed and driven by a third transmission gear set, and the inner bottom wall of the soil collecting frame slides down in an inclined shape from the left side to the middle of the right side.

[0009] Preferably, the soil transport mechanism further comprises a first fixed block and a second fixed block, the first fixed block and the second fixed block are respectively fixedly mounted on the front surface and the right surface of the soil collecting frame, the inner walls of the first fixed block and the second fixed block are rotatably sleeved with a first transmission shaft, and the front end of the other soil breaking roller close to the front of the third transmission gear set, the two ends of the first transmission shaft located at the inner wall of the first fixed block, and the front end of the first transmission shaft located at the inner wall of the second fixed block are all fixedly sleeved with the inner wall of the bevel gear of the bevel gear set; The back side of the second fixed block is rotatably sleeved with a second transmission shaft, and the rear ends of the first transmission shaft and the second transmission shaft located on the inner wall of the second fixed block are both fixedly sleeved with the inner wall of the gear of the first transmission gear set.

[0010] Preferably, a soil discharge rod is rotatably sleeved at the discharge port of the soil collecting frame, a soil discharge plate is fixedly sleeved on the outer surface of the soil discharge rod located in the soil collecting frame, a front end of the soil discharge rod penetrates the front inner wall of the discharge port of the soil collecting frame and then extends to the front of the soil collecting frame, a front end of the soil discharge rod located at the front of the soil collecting frame and a rear end of the second transmission shaft located behind the first transmission gear set are transmission-connected via a belt transmission mechanism, and a protective frame is rotatably sleeved on the outer surface of the soil discharge rod; The outer surface of the protective frame is slidably connected to the inner wall of the X-frame mounting groove of the excavator body, and the inner wall of the mounting groove of the protective frame is rotatably connected with a driving roller and a driven roller, and the driving roller and the driven roller are symmetrically distributed with the axis of the protective frame as the symmetry center, the conveyor belt is transmission-connected to the outer surfaces of the driving roller and the driven roller, and the soil discharge rod is transmission-connected to the driving roller through a belt transmission mechanism.

[0011] Preferably, the mixing box is fixedly mounted on the right side surface of the protective frame, the rear end of the driven roller is rotatably connected with the rear inner wall of the mixing box and then extends to the back side of the mixing box, the two ends of the spiral blade are respectively rotatably connected with the front inner wall and the rear inner wall of the mixing box, and the two spiral blades are staggered left and right inside the mixing box, the rear ends of the two spiral blades penetrate the rear inner wall of the mixing box and then extend to the back side of the mixing box, the two spiral blades are externally meshed through the second transmission gear set, the rear end of the driven roller located on the back side of the mixing box is connected to the rear end of one of the spiral blades located on the back side of the mixing box through a belt drive mechanism, and the injection port is opened on the upper surface of the mixing box.

[0012] Preferably, the feed end of the connecting pipe is rotatably connected to the discharge port of the mixing box through a pin, and the discharge end of the connecting pipe is rotatably connected to the feed port of the forming template through a pin. The supporting mechanism also includes a fixing frame fixedly mounted on the upper surface of the mixing box, and the arc cylinder is fixedly mounted at the center of the upper surface of the fixing frame.

[0013] Preferably, one end of the piston rod of the arc cylinder is fixedly mounted on the back of the shaping template, and carbon fiber heating tubes distributed in a rectangular array are fixedly mounted inside the shaping template. The arc cylinder is coaxial with the pin shaft located at the feed end of the connecting tube.

[0014] Preferably, the relevant parameters of the foundation pit side wall in the editing window of the visualization interface specifically include the length of the foundation pit side wall and the length of the side wall of the foundation pit With chord length The angle between .

[0015] Preferably, the calculation formula for the displacement distance when the shaping template changes from a vertical state to an inclined state is specifically:

[0016] in, Indicates the displacement distance when the forming template changes from a vertical to an inclined state.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes the simultaneous excavation and support of foundation pit through the coordinated action of soil collecting mechanism, soil transporting mechanism, mixing mechanism and supporting mechanism, uses the excavated soil to refill the side wall of foundation pit to form a supporting wall, and uses the mixing mechanism to inject cement slurry to reinforce the soil, thereby solving the problems existing in the traditional method, and further having the advantages of improving project quality, reducing risks, saving costs and complying with environmental protection and sustainable development.

[0018] 2. The present invention, through the coordination of the visual interface, the processing module and the control terminal of the excavator body, can realize the input of relevant parameters in advance according to the construction requirements, so as to automatically calculate and adjust the angle of the forming template of the support mechanism, ensure that the inclination angle of the supporting wall meets the specific requirements, thereby significantly improving the efficiency and safety of foundation pit excavation, and by accurately adjusting the angle of the supporting wall, it can adapt well to different construction environments and requirements, and provide reliable support for the side walls of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a three-dimensional diagram of the mounting frame structure of the present invention; Figure 3 This is a three-dimensional diagram of the main structure of the excavator of the present invention; Figure 4 A three-dimensional diagram of the structure of the soil-breaking roller of the present invention; Figure 5 It is a three-dimensional diagram of the structure of the first transmission gear set of the present invention; Figure 6 This is a three-dimensional diagram of the injection port structure of the present invention; Figure 7 It is a three-dimensional diagram of the structure of the bevel gear set of the present invention; Figure 8 This is a three-dimensional diagram of the protective frame structure of the present invention; Fig. 9 It is a three-dimensional diagram of the soil collecting frame structure of the present invention; Fig.10 A half-section stereoscopic view of the soil collecting frame structure of the present invention; Fig.11 This is a three-dimensional diagram of the carbon fiber heating tube structure of the present invention; Fig.12 It is a three-dimensional diagram of the fixing frame structure of the present invention; Fig.13 This is a three-dimensional diagram of the connecting pipe structure of the present invention; Fig.14 It is a three-dimensional diagram of the spiral blade structure of the present invention; Fig.15 This is a system block diagram of the present invention.

[0020] In the figure: 1. excavator body; 2. soil collecting frame; 21. soil breaking roller; 22. driving motor; 23. mounting frame; 24. motor mounting seat; 25. third transmission gear set; 3. bevel gear set; 31. first transmission gear set; 32. conveyor belt; 33. first fixed block; 34. second fixed block; 35. first transmission shaft; 36. second transmission shaft; 37. soil discharge rod; 38. soil discharge plate; 39. protection frame; 310. active roller; 311. driven roller; 4. mixing box; 41. second transmission gear set; 42. spiral blade; 43. injection port; 5. shaping template; 51. connecting pipe; 52. arc cylinder; 53. fixing frame; 54. carbon fiber heating tube; 6. visualization interface; 7. processing module; 8. control terminal. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figures 1 to 15 As shown, the present invention provides a foundation pit support structure for foundation pit excavation, including an excavator body 1, a movable soil collecting mechanism is arranged between the bucket and crawler of the excavator body 1, and the soil collecting mechanism includes a soil collecting frame 2, a soil breaking roller 21 and a driving motor 22. During the foundation pit excavation process, the bucket of the excavator body 1 uses the soil collecting frame 2 of the soil collecting mechanism to collect the soil generated during the foundation pit excavation process, and at the same time, uses the driving motor 22 to drive the soil breaking roller 21 to squeeze and crush the collected soil. In order to facilitate the movement of the soil collecting mechanism with the excavator body 1 and not interfere with the normal operation of the excavator body 1, the present application has universal wheels distributed in a linear array rotatably sleeved under the soil collecting frame 2 of the soil collecting mechanism. In addition, the plurality of universal wheels arranged can also support the soil collecting frame 2, and then through the coordinated use of the soil collecting mechanism and the universal wheels, efficient soil collection and crushing processing is achieved, while ensuring the mobility flexibility and the continuity of the excavator operation. The discharge port of the soil collecting frame 2 is provided with a movable soil transporting mechanism, and the soil transporting mechanism is located below the operating room of the excavator body 1. The soil transporting mechanism includes a bevel gear set 3, a first transmission gear set 31 and a conveyor belt 32. When the soil collecting mechanism moves, the bevel gear set 3 and the first transmission gear set 31 are meshed to drive the conveyor belt 32 to transport the soil crushed by the soil collecting mechanism. The discharge port of the soil transport mechanism is provided with a mixing mechanism, which is located on the right side of the operating room shell of the excavator body 1. The mixing mechanism includes a mixing box 4, a second transmission gear set 41, a spiral blade 42 and a material injection port 43. The soil transport mechanism transports the crushed soil to the inside of the mixing box 4, and at the same time, uses the material injection port 43 to communicate with the feed pipe of the external mud pump, and through the cooperation of the second transmission gear set 41 and the spiral blade 42, drives the soil flowing into the mixing box 4 and the cement slurry to be spirally mixed along the spiral curve of the spiral blade 42 to form a mixed soil body. In order to achieve a stable support effect for the mixing box 4, the present application has a universal wheel distributed in a linear array rotatably sleeved below the mixing box 4; The discharge port of the mixing mechanism is provided with a movable supporting mechanism, which includes a fixed template 5 and a connecting pipe 51. The connecting pipe 51 is used to fill the mixed soil into the cavity of the fixed template 5, and a supporting wall is formed on the side wall of the foundation pit, so as to realize the supporting action on the side wall of the foundation pit. Through the mutual cooperation of the mixing mechanism and the movable supporting mechanism, an automated and efficient foundation pit side wall supporting process is realized. The coordinated use of the fixed template 5 and the connecting pipe 51 enables the mixed soil to be accurately filled and form the required supporting wall, thereby ensuring the safety and stability of the foundation pit excavation, and thus having the advantages of not only simplifying the operation process but also significantly improving the construction efficiency and quality; It also includes a visualization interface 6, a processing module 7 and a control terminal 8 of the excavator body 1, wherein: According to the construction requirements, the operator inputs the relevant parameters of the foundation pit side wall in the editing window of the visualization interface 6, and sends the input parameter data to the processing module 7. Based on the input parameter data, the displacement distance of the shaping template 5 from the vertical to the inclined state is calculated, and the control terminal 8 of the excavator body 1 forms a control instruction to control the arc cylinder 52 installed above the mixing box 4 to extend, drive the shaping template 5 of the support mechanism to rotate in an arc, adjust the angle of the shaping template 5 of the support mechanism, and form a supporting wall that meets the construction requirements, that is, the inclination angle of the supporting wall is consistent with the inclination angle required by the construction. Through the mutual cooperation of the visualization interface 6, the processing module 7 and the control terminal 8 of the excavator body 1, the efficiency and safety of foundation pit excavation are significantly improved, and by accurately adjusting the angle of the supporting wall, it can adapt well to different construction environments and requirements and provide reliable support for the foundation pit side wall.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Fig. 9 and Fig.10 As shown, the X-frame of the excavator body 1 and the right side surface of the soil collecting frame 2 are both rotatably sleeved with a mounting frame 23, the two ends of the soil-breaking roller 21 are respectively rotatably sleeved with the front inner wall and the rear inner wall of the soil collecting frame 2, and multiple soil-breaking rollers 21 are distributed in a linear array inside the soil collecting frame 2. Through the rotatable sleeve connection between the soil-breaking roller 21 and the soil collecting frame 2, the soil-breaking roller 21 can rotate under the drive of the driving motor 22, so as to break and loosen the soil and facilitate subsequent transportation and processing. The front ends of the multiple soil-breaking rollers 21 all penetrate the front inner wall of the soil collecting frame 2 and extend to the front of the soil collecting frame 2. The soil collecting mechanism also includes a motor mounting seat 24 fixedly connected to the front of the soil collecting frame 2, and the driving motor 22 is fixed. It is fixedly installed on the inner wall of the motor mounting base 24, and the output shaft of the driving motor 22 is fixedly connected to the front end of one of the soil-breaking rollers 21 located on the front side of the soil collecting frame 2 through a coupling. The adjacent soil-breaking rollers 21 are externally meshed through the third transmission gear set 25 to achieve synchronous rotation, effective power transmission, uniform load distribution and compact structure. Through the combined effect of the above advantages, the soil collecting mechanism can be more efficient, reliable and easy to maintain. The inner bottom wall of the soil collecting frame 2 is inclined and slides down from the left side to the middle of the right side, which helps to guide and collect the processed soil to slide along the bottom of the soil collecting frame 2 to the middle of the right side, making it convenient for subsequent soil transporting mechanisms to transport it.

[0024] The above scheme is adopted: during the excavation of the foundation pit, the bucket of the excavator body 1 uses the soil collecting frame 2 of the soil collecting mechanism to collect the soil generated during the excavation of the foundation pit. At the same time, the control terminal 8 of the excavator body 1 controls the drive motor 22 to start, and one of the soil-breaking rollers 21 of the drive motor 22 rotates. The gears in the third transmission gear set 25 set at the front end of the multiple soil-breaking rollers 21 are engaged with the outer gear, driving the multiple soil-breaking rollers 21 to rotate synchronously, so as to squeeze and crush the soil collected by the soil collecting frame 2.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Fig.12As shown, the soil transport mechanism also includes a first fixed block 33 and a second fixed block 34, which are fixedly mounted on the front and right surfaces of the soil collecting frame 2 respectively, and the inner walls of the first fixed block 33 and the second fixed block 34 are rotatably sleeved with a first transmission shaft 35, and the first fixed block 33 and the second fixed block 34 are fixedly mounted on the soil collecting frame 2, which not only ensures the stability of the first transmission shaft 35 during power transmission, but also reduces the efficiency loss caused by vibration and displacement, and the front end of the other earth-breaking roller 21 close to the front of the third transmission gear set 25, the two ends of the first transmission shaft 35 located at the inner wall of the first fixed block 33, and the front end of the first transmission shaft 35 located at the inner wall of the second fixed block 34 are fixedly sleeved with the inner wall of the bevel gear of the bevel gear set 3; The back of the second fixed block 34 is rotatably sleeved with a second transmission shaft 36. The rear ends of the first transmission shaft 35 and the second transmission shaft 36 located on the inner wall of the second fixed block 34 are both fixedly sleeved with the inner wall of the gear of the first transmission gear set 31. When the driving motor 22 drives the earth-breaking roller 21 to break the soil, the earth-breaking roller 21, the first fixed block 33, the second fixed block 34, the first transmission shaft 35, the second transmission shaft 36, the bevel gear set 3 and the first transmission gear set 31 cooperate with each other, so that the earth-breaking roller 21 can drive the soil transport mechanism when working. The soil collecting frame 2 is synchronously rotated to transfer the crushed soil to the next mechanism in time, thereby ensuring that the soil will not stay in the soil collecting frame 2 for a long time, avoiding accumulation and blockage, and improving the overall processing efficiency. The discharge port of the soil collecting frame 2 is rotatably sleeved with a soil discharge rod 37, and the outer surface of the soil discharge rod 37 located in the soil collecting frame 2 is fixedly sleeved with a soil discharge plate 38. The front end of the soil discharge rod 37 penetrates the front inner wall of the discharge port of the soil collecting frame 2 and then extends to the front of the soil collecting frame 2. The soil discharge rod 37 is located between the front end of the front face of the soil collecting frame 2 and the rear end of the second transmission shaft 36 located behind the first transmission gear set 31. The belt transmission mechanism is used for transmission connection. Through the cooperation between the soil discharge rod 37, the soil discharge plate 38, the belt transmission mechanism and the second transmission shaft 36, the soil discharge plate 38 can actively push the crushed soil to the conveyor belt 32 while the second transmission shaft 36 rotates, thereby avoiding the accumulation of soil in the soil collecting frame 2 and ensuring the smoothness of continuous operation. The outer surface of the soil discharge rod 37 is rotatably sleeved with a protective frame 39. When the soil collecting frame 2 encounters an uneven road surface during movement, since the soil discharge rod 37 and the protective frame 39 adopt a rotatable sleeve connection, the soil collecting frame 2 can automatically adjust its angle within a certain range when facing different terrains to maintain the best contact state with the ground, thereby improving the efficiency of soil breaking and soil collecting. Under complex terrain conditions, if the soil collecting frame 2 and the protective frame 39 are rigidly fixedly connected, sudden impact or up and down fluctuations on uneven ground can easily cause damage to mechanical components. In view of this situation, the rotatable sleeve provided in the present application provides a certain buffering effect, which can effectively reduce the impact force on the soil collecting frame 2, thereby extending the service life of the foundation pit support structure of the present application; The outer surface of the protective frame 39 is slidably sleeved with the inner wall of the X-frame mounting groove of the excavator body 1. The outer surface of the protective frame 39 is slidably sleeved with the inner wall of the X-frame mounting groove of the excavator body 1. This setting is to enable the protective frame 39 to slide and adjust its position within a certain range, thereby further enhancing the flexibility and adaptability of the foundation pit support structure used for foundation pit excavation in this application. The inner wall of the mounting groove of the protective frame 39 is rotatably sleeved with an active roller 310 and a driven roller 311, and the active roller 310 and the driven roller 311 are symmetrically distributed with the axis of the protective frame 39 as the symmetric center, and the conveyor belt 32 is transmission connected to the outer surface of the active roller 310 and the driven roller 311, the soil discharge rod 37 is transmission connected to the active roller 310 through a belt transmission mechanism, the soil discharge rod 37 is transmission connected to the active roller 310 through a belt transmission mechanism, and the active roller 310 and the driven roller 311 are equipped with a conveyor belt 32. Since the soil discharge rod 37 adopts a rotating sleeve design, even if the soil collecting frame 2 is tilted or rotated within a certain range, it will not affect the stable operation of the conveyor belt 32, thereby ensuring that the crushed soil can be continuously transported to the mixing mechanism through the soil transport mechanism.

[0026] The above scheme is adopted: while the driving motor 22 drives the earth-breaking roller 21 to crush the soil, through the mutual cooperation of the earth-breaking roller 21, the first fixed block 33, the second fixed block 34, the first transmission shaft 35, the second transmission shaft 36, the bevel gear group 3 and the first transmission gear group 31, the earth-breaking roller 21 can drive the conveyor belt 32 of the soil transport mechanism to rotate synchronously during operation, and transport the crushed soil from the soil collecting mechanism to the mixing mechanism. During the transportation process of the conveyor belt 32, in order to improve the transportation efficiency, through the cooperation between the soil discharge rod 37, the soil discharge plate 38, the belt transmission mechanism and the second transmission shaft 36, the soil discharge plate 38 can actively push the crushed soil to the conveyor belt 32 while the second transmission shaft 36 rotates, thereby avoiding the accumulation of soil in the soil collecting frame 2 and ensuring the smoothness of continuous operation.

[0027] like Figure 1 , Figure 4 , Figure 7 , Fig.12 , Fig.13 and Fig.14As shown, the mixing box 4 is fixedly installed on the right side surface of the protective frame 39, the rear end of the driven roller 311 is rotatably sleeved with the rear inner wall of the mixing box 4 and then extends to the back of the mixing box 4, the two ends of the spiral blade 42 are rotatably sleeved with the front inner wall and the rear inner wall of the mixing box 4 respectively, and the two spiral blades 42 are staggered left and right inside the mixing box 4, the rear ends of the two spiral blades 42 both penetrate the rear inner wall of the mixing box 4 and then extend to the back of the mixing box 4, the two spiral blades 42 are externally meshed and driven by the second transmission gear set 41, and the rear end of the driven roller 311 located at the back of the mixing box 4 is connected to one of the spiral blades through a belt transmission mechanism. The blade 42 is located at the rear end transmission connection of the back of the mixing box 4. The two spiral blades 42 are used to mix the soil and cement slurry flowing into the mixing box 4 through rotation, so that the two materials can be mixed more evenly, which can not only effectively improve the mixing quality of the soil and cement slurry, but also significantly improve the stability and safety of the foundation pit supporting wall, and avoid the occurrence of collapse and landslides. The injection port 43 is opened on the upper surface of the mixing box 4. The main purpose of setting the injection port 43 is to enable the cement slurry transported by the external mud pump to easily enter the mixing mechanism, ensuring that the cement slurry can efficiently and continuously enter the mixing area.

[0028] The above scheme is adopted: the soil transport mechanism transports the crushed soil into the mixing box 4, and at the same time, uses the injection port 43 to connect with the feed pipe of the external mud pump, and through the cooperation of the second transmission gear set 41 and the spiral blade 42, drives the soil and cement slurry flowing into the mixing box 4 to be spirally mixed along the spiral curve of the spiral blade 42 to form a mixed soil body. At the same time, the spiral curve on the surface of the spiral blade 42 is used to drive the mixed soil body to be transported to the discharge port of the mixing box 4.

[0029] like Figure 1 , Figure 4 , Figure 6 , Fig.11 , Fig.12 and Fig.13As shown, the feed end of the connecting pipe 51 is rotatably connected with the discharge port of the mixing box 4 through a pin shaft, and the discharge end of the connecting pipe 51 is rotatably connected with the feed port of the shaping template 5 through a pin shaft. The mixing box 4 and the shaping template 5 are connected through a movable connecting pipe 51, so that when the shaping template 5 is adjusted in an angle, the connecting pipe 51 can also stably transport the mixed soil from the mixing box 4 to the shaping template 5. The supporting mechanism also includes a fixing frame 53 fixedly mounted on the upper surface of the mixing box 4, an arc cylinder 52 fixedly mounted at the center of the upper surface of the fixing frame 53, one end of the piston rod of the arc cylinder 52 is fixedly mounted on the back of the shaping template 5, and carbon fiber heating pipes 54 distributed in a rectangular array are fixedly mounted inside the shaping template 5. The heat generated by the carbon fiber heating tube 54 dries the mixed soil, which can accelerate the solidification reaction of the cement slurry, shorten the solidification time of the mixed soil, and improve the construction efficiency. In addition, in order to ensure the quality of the mixed soil and avoid overheating or overcooling, a temperature sensor can be installed on the back of the shaping template 5 to achieve the effect of monitoring the heating temperature in the cavity. Since this measure belongs to the prior art, it will not be described in detail here. It is not shown in the figure. The arc cylinder 52 is coaxial with the pin shaft located at the feed end of the connecting pipe 51, so that when the angle of the shaping template 5 needs to be adjusted, the arc cylinder 52 will rotate with the axis center of the pin shaft as the center of the circle, thereby effectively reducing the eccentric stress and wear caused by non-concentric rotation.

[0030] The above scheme is adopted: after the mixed soil moves to the discharge port of the mixing box 4 through the bolt blades, the mixed soil is filled into the cavity of the shaping template 5 using the connecting pipe 51, and a supporting wall that meets the construction requirements is formed on the side wall of the foundation pit. During the shaping process of the supporting wall in the shaping template 5, the heat generated by the carbon fiber heating tube 54 is used to dry the mixed soil, which can accelerate the solidification reaction of the cement slurry and shorten the curing time of the mixed soil.

[0031] like Fig.15 As shown, the relevant parameters of the foundation pit side wall in the editing window of the visualization interface 6 specifically include the length of the foundation pit side wall and the length of the side wall of the foundation pit With chord length The angle between If the foundation pit is excavated in stages, the length of the side wall of the foundation pit is is the vertical height of a single level in the corresponding classification; The specific calculation formula of the displacement distance of the shaping template 5 from the vertical state to the inclined state is:

[0032] in, It indicates the displacement distance of the shaping template 5 when it changes from a vertical state to an inclined state.

[0033] The working principle and use process of the present invention: Step 1: According to the actual construction requirements of the foundation pit, the visualization interface 6, the processing module 7 and the control terminal 8 of the excavator body 1 are called, and the control terminal 8 of the excavator body 1 adjusts the angle of the fixed template 5 of the support mechanism through the arc cylinder 52, so as to provide reliable support for the side wall of the foundation pit in the future; Step 2: After the adjustment is completed, the excavator body 1 starts excavation work. During the excavation of the foundation pit, the bucket of the excavator body 1 uses the soil collecting frame 2 of the soil collecting mechanism to collect the soil generated during the excavation of the foundation pit. At the same time, the control terminal 8 of the excavator body 1 controls the drive motor 22 to start, and one of the soil breaking rollers 21 of the drive motor 22 rotates. The gears in the third transmission gear set 25 set at the front ends of the multiple soil breaking rollers 21 are meshed with the outer gears, driving the multiple soil breaking rollers 21 to rotate synchronously, and the soil collected by the soil collecting frame 2 is squeezed and crushed; Step 3, while the driving motor 22 drives the earth-breaking roller 21 to break the soil, the earth-breaking roller 21, the first fixed block 33, the second fixed block 34, the first transmission shaft 35, the second transmission shaft 36, the bevel gear set 3 and the first transmission gear set 31 cooperate with each other, so that the earth-breaking roller 21 can drive the conveyor belt 32 of the soil transport mechanism to rotate synchronously during operation, and the crushed soil is transported from the soil collecting mechanism to the mixing mechanism. During the conveying process of the conveyor belt 32, in order to improve the conveying efficiency, the earth-discharging rod 37, the earth-discharging plate 38, the belt transmission mechanism and the second transmission shaft 36 cooperate with each other, so that the earth-discharging plate 38 can actively push the crushed soil to the conveyor belt 32 while the second transmission shaft 36 rotates, thereby avoiding the accumulation of soil in the soil collecting frame 2 and ensuring the smoothness of continuous operation; Step 4: The soil transport mechanism transports the crushed soil to the inside of the mixing box 4, and at the same time, uses the injection port 43 to communicate with the feed pipe of the external mud pump, and through the cooperation of the second transmission gear set 41 and the spiral blade 42, drives the soil and cement slurry flowing into the mixing box 4 to be spirally mixed along the spiral curve of the spiral blade 42 to form a mixed soil body. At the same time, the spiral curve on the surface of the spiral blade 42 is used to drive the mixed soil body to be transported to the discharge port of the mixing box 4; Step 5. After the mixed soil moves to the discharge port of the mixing box 4 through the bolt blades, the mixed soil is filled into the cavity of the shaping template 5 using the connecting pipe 51, and a supporting wall that meets the construction requirements is formed on the side wall of the foundation pit. During the shaping process of the supporting wall in the shaping template 5, the heat generated by the carbon fiber heating tube 54 is used to dry the mixed soil, which can accelerate the solidification reaction of the cement slurry and shorten the curing time of the mixed soil.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit support structure for foundation pit excavation, comprising an excavator body (1), characterized in that: A movable soil collecting mechanism is provided between the bucket and crawler of the excavator body (1), the soil collecting mechanism comprising a soil collecting frame (2), a soil breaking roller (21) and a drive motor (22). During the excavation of the foundation pit, the bucket of the excavator body (1) uses the soil collecting frame (2) of the soil collecting mechanism to collect soil generated during the excavation of the foundation pit, and at the same time, uses the drive motor (22) to drive the soil breaking roller (21) to squeeze and crush the collected soil. The discharge port of the soil collecting frame (2) is provided with a movable soil transporting mechanism, and the soil transporting mechanism is located below the operating room of the excavator body (1), and comprises a bevel gear set (3), a first transmission gear set (31) and a conveyor belt (32). When the soil collecting mechanism moves, the bevel gear set (3) and the first transmission gear set (31) are meshed, thereby driving the conveyor belt (32) to transport the soil crushed by the soil collecting mechanism; The discharge port of the soil transport mechanism is provided with a mixing mechanism, the mixing mechanism being located on the right side of the operating room shell of the excavator body (1), the mixing mechanism comprising a mixing box (4), a second transmission gear set (41), a spiral blade (42) and a material injection port (43). The soil transport mechanism transports the crushed soil to the inside of the mixing box (4), while communicating with the feed pipe of an external mud pump through the material injection port (43), and driving the soil flowing into the mixing box (4) and cement slurry to be spirally mixed along the spiral curve of the spiral blade (42) through the cooperation of the second transmission gear set (41) and the spiral blade (42) to form a mixed soil body; The discharge port of the mixing mechanism is provided with a movable supporting mechanism, the supporting mechanism comprising a shaping template (5) and a connecting pipe (51), the connecting pipe (51) is used to fill the mixed soil into the cavity of the shaping template (5), and a supporting wall is formed on the side wall of the foundation pit, so as to realize a supporting action on the side wall of the foundation pit; It also includes a visualization interface (6), a processing module (7) and a control terminal (8) of the excavator body (1), wherein: According to the construction requirements, the operator inputs the relevant parameters of the foundation pit side wall in the editing window of the visual interface (6), and sends the input parameter data to the processing module (7). Based on the input parameter data, the displacement distance of the fixed template (5) from the vertical to the inclined state is calculated, and the control terminal (8) of the excavator body (1) forms a control instruction to control the arc cylinder (52) installed above the mixing box (4) to extend, drive the fixed template (5) of the support mechanism to rotate in an arc, adjust the angle of the fixed template (5) of the support mechanism, and form a support wall that meets the construction requirements.

2. The foundation pit support structure for foundation pit excavation according to claim 1, characterized in that: The X-frame of the excavator body (1) and the right side surface of the soil collecting frame (2) are both rotatably sleeved with a mounting frame (23), the two ends of the soil-breaking roller (21) are respectively rotatably sleeved with the front inner wall and the rear inner wall of the soil collecting frame (2), and a plurality of soil-breaking rollers (21) are distributed in a linear array inside the soil collecting frame (2), the front ends of the plurality of soil-breaking rollers (21) all penetrate the front inner wall of the soil collecting frame (2) and extend to the front side of the soil collecting frame (2), and the soil collecting mechanism also includes a motor mounting seat (24) fixedly connected to the front side of the soil collecting frame (2).

3. The foundation pit support structure for foundation pit excavation according to claim 2, characterized in that: The driving motor (22) is fixedly mounted on the inner wall of the motor mounting seat (24); the output shaft of the driving motor (22) is fixedly connected to the front end of one of the soil-breaking rollers (21) located on the front side of the soil collecting frame (2) via a coupling; adjacent soil-breaking rollers (21) are externally meshed and driven by a third transmission gear set (25); the inner bottom wall of the soil collecting frame (2) is inclined and slides downward from the left side to the middle of the right side.

4. The foundation pit supporting structure for foundation pit excavation according to claim 3, characterized in that: The soil transport mechanism further comprises a first fixed block (33) and a second fixed block (34), the first fixed block (33) and the second fixed block (34) being fixedly mounted on the front and right surfaces of the soil collecting frame (2) respectively, the inner walls of the first fixed block (33) and the second fixed block (34) being rotatably sleeved with a first transmission shaft (35), the front end of the soil breaking roller (21) close to the front of the third transmission gear set (25), the two ends of the first transmission shaft (35) located on the inner wall of the first fixed block (33), and the front end of the first transmission shaft (35) located on the inner wall of the second fixed block (34) are all fixedly sleeved with the inner wall of the bevel gear of the bevel gear set (3); A second transmission shaft (36) is rotatably sleeved on the back of the second fixed block (34), and the rear ends of the first transmission shaft (35) and the second transmission shaft (36) located on the inner wall of the second fixed block (34) are both fixedly sleeved on the inner wall of the gear of the first transmission gear set (31).

5. The foundation pit supporting structure for foundation pit excavation according to claim 4, characterized in that: The discharge port of the soil collecting frame (2) is rotatably sleeved with a soil discharge rod (37); the outer surface of the soil discharge rod (37) located inside the soil collecting frame (2) is fixedly sleeved with a soil discharge plate (38); the front end of the soil discharge rod (37) penetrates the front inner wall of the discharge port of the soil collecting frame (2) and then extends to the front surface of the soil collecting frame (2); the front end of the soil discharge rod (37) located on the front surface of the soil collecting frame (2) is connected to the rear end of the second transmission shaft (36) located behind the first transmission gear set (31) through a belt transmission mechanism; the outer surface of the soil discharge rod (37) is rotatably sleeved with a protective frame (39); The outer surface of the protection frame (39) is slidably sleeved with the inner wall of the X-frame mounting groove of the excavator body (1); the inner wall of the mounting groove of the protection frame (39) is rotatably sleeved with a driving roller (310) and a driven roller (311), respectively; and the driving roller (310) and the driven roller (311) are symmetrically distributed with the axis of the protection frame (39) as the symmetry center; the conveyor belt (32) is transmission-connected to the outer surfaces of the driving roller (310) and the driven roller (311); and the soil removal rod (37) is transmission-connected to the driving roller (310) via a belt transmission mechanism.

6. The foundation pit supporting structure for foundation pit excavation according to claim 5, characterized in that: The mixing box (4) is fixedly mounted on the right side surface of the protective frame (39); the rear end of the driven roller (311) is rotatably sleeved with the rear inner wall of the mixing box (4) and then extends to the back side of the mixing box (4); the two ends of the spiral blade (42) are rotatably sleeved with the front inner wall and the rear inner wall of the mixing box (4) respectively; the two spiral blades (42) are staggered in the left and right inside the mixing box (4); the rear ends of the two spiral blades (42) penetrate the rear inner wall of the mixing box (4) and then extend to the back side of the mixing box (4); the two spiral blades (42) are externally meshed and driven by a second transmission gear set (41); the rear end of the driven roller (311) located on the back side of the mixing box (4) is transmission-connected to the rear end of one of the spiral blades (42) located on the back side of the mixing box (4) through a belt transmission mechanism; and the injection port (43) is provided on the upper surface of the mixing box (4).

7. The foundation pit supporting structure for foundation pit excavation according to claim 6, characterized in that: The feed end of the connecting pipe (51) is rotatably sleeved with the discharge port of the mixing box (4) via a pin, and the discharge end of the connecting pipe (51) is rotatably sleeved with the feed port of the shaping template (5) via a pin. The supporting mechanism further comprises a fixing frame (53) fixedly mounted on the upper surface of the mixing box (4), and the arc cylinder (52) is fixedly mounted at the center of the upper surface of the fixing frame (53).

8. The foundation pit supporting structure for foundation pit excavation according to claim 7, characterized in that: One end of the piston rod of the arc-shaped cylinder (52) is fixedly mounted on the back of the shaping template (5), and carbon fiber heating tubes (54) distributed in a rectangular array are fixedly mounted inside the shaping template (5), and the arc-shaped cylinder (52) is coaxial with a pin shaft located at the feed end of the connecting tube (51).

9. The foundation pit supporting structure for foundation pit excavation according to claim 8, characterized in that: The relevant parameters of the foundation pit side wall in the editing window of the visualization interface (6) specifically include the length of the foundation pit side wall and the length of the side wall of the foundation pit With chord length The angle between .

10. The foundation pit supporting structure for foundation pit excavation according to claim 9, characterized in that: The specific calculation formula of the displacement distance of the shaping template (5) when it changes from a vertical state to an inclined state is: in, It represents the displacement distance when the forming template (5) changes from a vertical state to an inclined state.

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