A rainwater and sewage pipe network foundation pit excavation support and protection device

Abstract

The present invention discloses a rainwater and sewage pipe network foundation pit excavation support and protection device, which relates to the technical field of sewage pipe network foundation pit excavation, and comprises: a support frame, on which two insertion devices, two first bearing shells, a second bearing shell and a support installation assembly are fixedly arranged, the two insertion devices and the two first bearing shells are mirror-arranged, and the two insertion devices correspond to the two first bearing shells one-to-one, each first bearing shell is arranged in the middle of the corresponding insertion device, the support installation assembly is arranged on the side of the two insertion devices away from the first bearing shell, and the second bearing shell is arranged on the other side of the support installation assembly; the device can be moved on the outside of the foundation pit through the support frame, and the support frame can be adjusted according to the size of the foundation pit, so that the device can adapt to the needs of different foundation pit excavation support.

Description

Technical Field

[0001] The invention relates to the technical field of sewage pipe network foundation pit excavation, and in particular to a rainwater and sewage pipe network foundation pit excavation support and protection device. Background Art

[0002] The foundation pit is a space below the ground, which is used for the construction of the foundation and basement of buildings (including structures). In sewage pipe network projects, the foundation pit specifically refers to the earth pit excavated for laying sewage pipes. The excavation area of ​​the foundation pit is usually small, but the depth may be large to meet the requirements of laying sewage pipes. The geological conditions may be complex and changeable, including different soil layers and groundwater conditions. The construction of the foundation pit may have a certain impact on the surrounding environment, such as ground subsidence and instability of surrounding buildings. When the foundation pit is excavated, steel sheet piles are used as the foundation pit retaining system. The steel sheet piles are driven into the soil by a vibrating hammer to form a continuous support structure. Steel sheet pile support has the advantages of fast construction speed and good support effect.

[0003] However, the construction of steel sheet piles requires the selection of appropriate piling equipment. Insufficient equipment power or inappropriate type for the current soil conditions may result in the inability to drive the steel sheet piles in. In addition, improper construction methods, such as incorrect piling sequence and piling angle, may also result in the inability to drive the steel sheet piles in. At the same time, when sinking piles in hard clay layers, dense sand, gravel or rock layers, auxiliary piling measures such as water flushing and pre-drilling are required. In addition, when the groundwater level is high or the soil is soft, the technical level of the construction personnel and the mechanical equipment are required to be high. The existing equipment cannot independently meet the construction requirements and usually requires the cooperation of multiple mechanical types, which will greatly affect the support efficiency.

[0004] Therefore, it is necessary to provide a rainwater and sewage pipe network foundation pit excavation support and protection device to solve the above problems. Summary of the invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution, a rainwater and sewage pipe network foundation pit excavation support and protection device, comprising:

[0006] A support frame, on which two insertion devices, two first bearing shells, a second bearing shell and a support installation assembly are fixedly arranged, the two insertion devices and the two first bearing shells are mirror-arranged, and the two insertion devices correspond to the two first bearing shells one by one, each first bearing shell is arranged in the middle of the corresponding insertion device, the support installation assembly is arranged on one side of the two insertion devices away from the first bearing shell, and the second bearing shell is arranged on the other side of the support installation assembly;

[0007] A plurality of spare steel sheet piles are provided and are respectively fixedly arranged in the two first bearing shells;

[0008] A plurality of support frames are provided and fixedly arranged in the second bearing shell.

[0009] Preferably, the support frame includes self-driving traveling wheels, and there are four self-driving traveling wheels. A support column is fixedly arranged on the upper surface of each of the self-driving traveling wheels. A first fixed beam is horizontally arranged on the upper surface of two support columns on the same side surfaces as the two non-adjacent side surfaces of the first bearing shells, three adjustable beams are fixedly arranged on the inner sides of the two first fixed beams, and two second fixed beams are horizontally fixedly arranged in the middle of the two adjustable beams adjacent to the first bearing shell.

[0010] Preferably, the three adjustable beams are all of two-section structure, each of the adjustable beams is composed of two fixed frames with hydraulic cylinders inside, and the two hydraulic cylinders are fixed to each other, and the two second fixed beams are fixedly mounted on the fixed frames adjacent to the two adjustable beams.

[0011] Preferably, the insertion device comprises:

[0012] Two first horizontal rails are horizontally arranged and respectively fixedly mounted on the upper surface of the first fixed beam and the second fixed beam adjacent to the first fixed beam, the two ends of the two first horizontal rails are horizontally fixedly arranged with second horizontal rails, and the two first horizontal rails are horizontally slidably arranged with third horizontal rails, and the second horizontal rail adjacent to the support installation assembly and the third horizontal rail are slidably arranged with vertical first vertical rails;

[0013] A hydraulic hammering assembly is fixedly mounted on the lower end of a first vertical track slidably mounted on a second horizontal track adjacent to the support mounting assembly;

[0014] A first clamping assembly, fixedly disposed on the lower end of the first vertical track on the third horizontal track;

[0015] The drill is slidably arranged on the second horizontal track away from the hydraulic hammer assembly.

[0016] Preferably, the supporting installation assembly includes a fourth horizontal track, which is fixedly mounted on the upper surface of a first fixed beam, a fifth horizontal track is horizontally slidably arranged on the fourth horizontal track, and the fifth horizontal track is horizontally and vertically arranged with the fourth horizontal track, a second vertical track is vertically slidably arranged on the fifth horizontal track, and a second clamping assembly is fixedly arranged at the lower end of the second vertical track.

[0017] Preferably, the second clamping assembly comprises:

[0018] A fixed bearing plate, fixedly assembled at the lower end of the second vertical track, wherein two sixth horizontal tracks are horizontally fixedly arranged on the lower surface of the fixed bearing plate;

[0019] There are two sliding rails, one is fixedly mounted on the lower surface of the fixed bearing plate, and the other is slidably mounted on the two sixth horizontal rails, and two sliding blocks are slidably embedded on each sliding rail, and the two sliding blocks on the same sliding rail are mirror-imaged, and a clamping claw is fixedly mounted on the lower end of each sliding block;

[0020] A driving motor is slidably mounted on the two sixth horizontal rails.

[0021] Preferably, the support frame comprises:

[0022] Two support blocks are symmetrically arranged and fixedly stacked inside the second bearing shell or at the lower end of the second clamping assembly. The adjacent sides of the two support blocks are each provided with an adjusting screw. The outer threads of the two adjusting screws are provided with a fixed connecting rod, and a transmission device is provided on the outer side of the fixed connecting rod.

[0023] A plurality of elastic support blocks are provided, and are respectively fixedly embedded on the side surfaces of the two support blocks that are away from each other.

[0024] Preferably, the two adjusting screws are inversely threaded, and meshing threads are provided at both ends of the fixed connecting rod.

[0025] Preferably, two elastic anti-damage pads are provided at the lower end of the transmission.

[0026] Preferably, the transmission can cooperate with the driving shaft of the driving motor, and the fixed connecting rod can be rotated under the transmission of the transmission.

[0027] Compared with the prior art, the present invention provides a rainwater and sewage pipe network foundation pit excavation support and protection device, which has the following beneficial effects:

[0028] In the present invention, a program control mechanism is provided in the four self-driving traveling wheels. Before the device works, the staff can formulate a stricter trajectory route for the device through the program control mechanism according to the actual situation of the foundation pit, so that the device can accurately move along the route, while ensuring the work efficiency and improving the accuracy of the steel sheet pile support. At the same time, the device can move outside the foundation pit through the support frame, and the support frame can be adjusted according to the size of the foundation pit, so that the device can adapt to the needs of different foundation pit excavation support.

[0029] The insertion device in the present invention will insert the spare steel sheet piles stored in the first bearing shell into the appropriate position of the foundation pit during the movement of the supporting frame, and before the insertion, a prefabricated pile hole is drilled at the installation position of the steel sheet pile by a drill, so as to reduce the resistance of the steel sheet pile insertion and prevent the difficulty of insertion when the pile is sunk in a hard clay layer, dense sand, gravel or rock layer, thereby affecting the work efficiency; after the insertion, the steel sheet pile is hammered by a hydraulic hammer assembly to make it reach the depth and position required by the design, thereby ensuring the support effect, which can not only effectively prevent the landslide of the foundation pit wall and reduce the impact of construction on surrounding roads and the environment, but also improve the construction efficiency and quality, and has both soil retaining and water retaining functions.

[0030] While the steel sheet piles are inserted into the foundation pit to form support, the support installation assembly will support the steel sheet pile structure through the support frame stored in the second bearing shell at certain intervals (the interval length can be adjusted according to the actual foundation pit conditions) to prevent the steel sheet pile structure from bending, deforming, etc. due to the pressure of soil on both sides during the foundation pit excavation process, thereby reducing the support capacity of the steel sheet pile structure and further affecting the excavation efficiency.

[0031] In the present invention, a certain amount of spare steel sheet piles and support frames stored in the first load-bearing shell and the second load-bearing shell can support the device to perform automated support work, and the support frame can move along the planned route, further improving work efficiency. At the same time, the number of spare steel sheet piles in the first load-bearing shell is proportional to the number of support frames in the second load-bearing shell, and inversely proportional to the interval length, thereby further reducing the energy loss of the device and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a support and protection device for excavation of a rainwater and sewage pipe network foundation pit;

[0033] Figure 2 It is a structural schematic diagram of the support frame in the present invention;

[0034] Figure 3 for Figure 2 A is an enlarged structural diagram;

[0035] Figure 4 It is a structural schematic diagram of the insertion device in the present invention;

[0036] Figure 5 It is a structural schematic diagram of the support and installation assembly in the present invention;

[0037] Figure 6 is a schematic structural diagram of the second clamping assembly in the present invention;

[0038] Figure 7 It is a structural schematic diagram of the support frame in the present invention;

[0039] Figure 8 This is a schematic diagram of the working of the device in the foundation pit;

[0040] In the figure: 1, support frame; 2, insertion device; 3, first bearing shell; 4, spare steel sheet pile; 5, support installation assembly; 6, second bearing shell; 7, support frame; 8, foundation pit; 11, self-driving travel wheel; 12, support column; 13, first fixed beam; 14, adjustable beam; 15, second fixed beam; 21, first horizontal track; 22, second horizontal track; 23, third horizontal track; 24, first vertical track; 25, driller; 26, first clamp Assembly; 27, hydraulic hammer assembly; 51, fourth horizontal track; 52, fifth horizontal track; 53, second vertical track; 54, second clamping assembly; 541, fixed bearing plate; 542, sixth horizontal track; 543, sliding block; 544, clamping claw; 545, sliding track; 546, driving motor; 71, fixed connecting rod; 72, transmission; 73, adjusting screw; 74, support block; 75, elastic support block; 76, elastic anti-damage pad. DETAILED DESCRIPTION

[0041] See also Figures 1 to 8 The present invention provides a rainwater and sewage pipe network foundation pit excavation support and protection device, comprising:

[0042] A support frame 1, on which two insertion devices 2, two first bearing shells 3, a second bearing shell 6 and a support installation assembly 5 are fixedly arranged, the two insertion devices 2 and the two first bearing shells 3 are mirror-arranged, and the two insertion devices 2 correspond to the two first bearing shells 3 one by one, and each first bearing shell 3 is arranged in the middle of the corresponding insertion device 2, the support installation assembly 5 is arranged on one side of the two insertion devices 2 away from the first bearing shell 3, and the second bearing shell 6 is arranged on the other side of the support installation assembly 5;

[0043] A plurality of spare steel sheet piles 4 are provided and are fixedly arranged in the two first bearing shells 3 respectively;

[0044] A plurality of support frames 7 are provided and fixedly arranged in the second bearing shell 6;

[0045] As a preferred embodiment, the device can move outside the foundation pit 8 through the support frame 1, and the support frame 1 can be adjusted according to the size of the foundation pit 8, so that the device can adapt to the needs of different foundation pit excavation support. At the same time, the insertion device 2 will insert the spare steel sheet piles 4 stored in the first bearing shell 3 into the appropriate position of the foundation pit 8 during the movement of the support frame 1. It can not only effectively prevent the landslide of the foundation pit wall and reduce the impact of construction on surrounding roads and the environment, but also improve the construction efficiency and quality, and has the functions of retaining soil and water. When the steel sheet piles are inserted into the foundation pit 8 to form support, the support installation component 5 will pass through at a certain interval (the interval length can be adjusted according to the actual situation of the foundation pit 8) The steel sheet pile structure is supported by the support frame 7 stored in the second bearing shell 6 to prevent the steel sheet pile structure from bending, deforming, etc. due to the pressure of the soil on both sides during the excavation of the foundation pit 8, thereby reducing the support capacity of the steel sheet pile structure and further affecting the excavation efficiency. In addition, a certain amount of spare steel sheet piles 4 and the support frame 7 stored in the first bearing shell 3 and the second bearing shell 6 can support the device to perform automated support work, and the support frame 1 can move along the planned route to further improve work efficiency. At the same time, the number of spare steel sheet piles 4 in the first bearing shell 3 is proportional to the number of support frames 7 in the second bearing shell 6, and inversely proportional to the interval length, thereby further reducing the energy loss of the device and improving work efficiency.

[0046] Further, the support frame 1 includes a self-driving traveling wheel 11, and the self-driving traveling wheel 11 is provided with four. A support column 12 is fixedly provided on the upper surface of each of the self-driving traveling wheels 11, and a first fixed beam 13 is horizontally provided on the upper surface of two support columns 12 on the same side of two side surfaces not adjacent to the two first bearing shells 3, and three adjustable beams 14 are fixedly provided on the inner sides of the two first fixed beams 13, and two second fixed beams 15 are horizontally fixedly provided in the middle of the two adjustable beams 14 adjacent to the first bearing shell 3;

[0047] As a preferred embodiment, a program control mechanism is provided in the four self-driving traveling wheels 11. Before the device works, the staff can formulate a stricter trajectory route for the device through the program control mechanism according to the actual situation of the foundation pit, so that the device can move accurately along the route, thereby ensuring work efficiency while improving the accuracy of steel sheet pile support.

[0048] Furthermore, the three adjustable beams 14 are all of a two-stage structure, each of the adjustable beams 14 is composed of two fixed frames with hydraulic cylinders, and the two hydraulic cylinders are fixed to each other, and the two second fixed beams 15 are fixedly assembled on the fixed frames adjacent to the two adjustable beams 14;

[0049] As a preferred embodiment, the two-section structure of the adjustable beam 14 and the arrangement of the hydraulic cylinder therein allow the distance between the two first fixed beams 13 to be manually adjusted by the hydraulic cylinder, so that the device can adapt to the support and installation work of foundation pits 8 of different sizes.

[0050] Further, the insertion device 2 comprises:

[0051] Two first horizontal rails 21 are horizontally arranged and respectively fixedly assembled on the first fixed beam 13 and the upper surface of the second fixed beam 15 adjacent to the first fixed beam 13. The two ends of the two first horizontal rails 21 are horizontally fixedly arranged with second horizontal rails 22, and the two first horizontal rails 21 are horizontally slidably arranged with third horizontal rails 23. The second horizontal rails 22 and the third horizontal rails 23 adjacent to the support and installation assembly 5 are slidably arranged with vertical first vertical rails 24;

[0052] A hydraulic hammer assembly 27, fixedly disposed at the lower end of the first vertical track 24 adjacent to the support mounting assembly 5;

[0053] A first clamping assembly 26, fixedly disposed on the lower end of the first vertical track 24 on the third horizontal track 23;

[0054] A drill 25 is slidably disposed on a second horizontal track 22 away from the hydraulic hammer assembly 27;

[0055] As a preferred embodiment, when installing the steel sheet piles, the drill 25 will drill prefabricated pile holes at the installation position of the steel sheet piles in advance to reduce the resistance to the insertion of the steel sheet piles and prevent the piles from being difficult to insert when sinking in hard clay layers, dense sand, gravel or rock layers, thereby affecting work efficiency. Then, the first clamping assembly 26 will clamp the spare steel sheet piles 4 in the first bearing shell 3 under the movement of the third horizontal track 23, and insert them into the predetermined position. Then, the hydraulic hammer assembly 27 will hammer the steel sheet piles to reach the depth and position required by the design, thereby ensuring the support effect. The setting of the second horizontal track 22 and the third horizontal track 23 allows the drill 25, the first clamping assembly 26 and the hydraulic hammer assembly 27 to adjust their positions within a certain range, thereby coping with complex and changeable foundation pit conditions, thereby better performing support work.

[0056] Further, the support and installation assembly 5 includes a fourth horizontal track 51, the fourth horizontal track 51 is fixedly assembled on the upper surface of a first fixed beam 13, a fifth horizontal track 52 is horizontally slidably arranged on the fourth horizontal track 51, and the fifth horizontal track 52 is horizontally and vertically arranged with the fourth horizontal track 51, a second vertical track 53 is vertically slidably arranged on the fifth horizontal track 52, and a second clamping assembly 54 is fixedly arranged at the lower end of the second vertical track 53;

[0057] As a preferred embodiment, the second clamping assembly 54 is clamped to the support frame 7 in the second bearing shell 6 by the fourth horizontal rail 51, the fifth horizontal rail 52 and the second vertical rail 53, and is installed between a pile of steel sheet piles at a suitable position in the foundation pit 8 under the drive of the fourth horizontal rail 51, the fifth horizontal rail 52 and the second vertical rail 53, so as to support the steel sheet pile structure and prevent the steel sheet pile structure from bending and deforming due to the pressure of the soil on both sides during the excavation of the foundation pit, thereby reducing the support capacity of the steel sheet pile structure and further affecting the excavation efficiency.

[0058] Further, the second clamping assembly 54 includes:

[0059] A fixed bearing plate 541 is fixedly mounted on the lower end of the second vertical track 53, and two sixth horizontal tracks 542 are horizontally fixedly arranged on the lower surface of the fixed bearing plate 541;

[0060] There are two sliding rails 545, one is fixedly mounted on the lower surface of the fixed bearing plate 541, and the other is slidably mounted on the two sixth horizontal rails 542. Two sliding blocks 543 are slidably embedded on each sliding rail 545. The two sliding blocks 543 on the same sliding rail 545 are mirror-imaged, and a clamping claw 544 is fixedly mounted on the lower end of each sliding block 543.

[0061] A driving motor 546 is slidably mounted on the two sixth horizontal rails 542;

[0062] As a preferred embodiment, the four clamping claws 544 can clamp the column support frame 7 with the assistance of the sliding block 543, and the driving motor 546 will complete the engagement with the support frame 7 during the clamping process. When the support frame 7 reaches the specified position with the second clamping assembly 54, the driving motor 546 will rotate to extend the support frame 7, so as to adapt to the support work between foundation pit steel sheet pile structures of different sizes, and in the process of the extension of the support frame 7, the sliding track 545, the sliding block 543, the clamping claws 544 and the driving motor 546 on the sixth horizontal track 542 will slide to offset the change in relative position caused by the extension of the support frame 7, so as to ensure the clamping effect.

[0063] Further, the support frame 7 comprises:

[0064] Two support blocks 74 are symmetrically arranged and fixedly stacked inside the second bearing shell 6 or at the lower end of the second clamping assembly 54. The two support blocks 74 are each provided with an adjusting screw 73 on the adjacent sides. The outer threads of the two adjusting screws 73 are provided with a fixed connecting rod 71. The outer side of the fixed connecting rod 71 is provided with a transmission device 72.

[0065] There are multiple elastic support blocks 75, which are respectively fixedly embedded on the sides of the two support blocks 74 that are away from each other;

[0066] As a preferred embodiment, the setting of the adjusting screw 73 allows the distance between the two support blocks 74 to be adjusted, so that the support frame 7 is convenient for storage and transportation, and can adapt to the support requirements of foundation pits 8 of different sizes, thereby improving the practicality of the device. The setting of the elastic support block 75 allows the support frame 7 to complete the support work of some relatively irregular steel sheet pile structure surfaces, further ensuring the support effect of the steel sheet pile structure.

[0067] Furthermore, the two adjusting screws 73 are mutually inversely threaded, and the two ends of the fixed connecting rod 71 are respectively provided with meshing threads;

[0068] As a preferred embodiment, the setting of the reciprocal threads can enable the fixed connecting rod 71 to drive the two adjusting screws 73 to move in opposite directions during the rotation process, thereby improving the working efficiency of the device.

[0069] Furthermore, two elastic anti-damage pads 76 are provided at the lower end of the transmission device 72. The provision of the elastic anti-damage pads 76 can prevent the support frame 7 from colliding with each other to the greatest extent during storage and transportation, thereby preventing the transmission device 72 from being damaged.

[0070] Furthermore, the transmission device 72 can cooperate with the driving shaft of the driving motor 546 , and the fixed connecting rod 71 can be rotated under the transmission of the transmission device 72 .

[0071] During the specific implementation, the following steps are included: before the device works, the staff can formulate a more stringent trajectory route for the device through the program control mechanism according to the actual situation of the foundation pit 8, and adjust the support frame 1 according to the actual situation of the foundation pit 8, and adjust the number of spare steel sheet piles 4 in the first bearing shell 3 and the number of support frames 7 in the second bearing shell 6 according to the actual situation. The support frame 1 moves outside the foundation pit 8 according to the established trajectory. At the same time, the insertion device 2 will insert the spare steel sheet piles 4 stored in the first bearing shell 3 into the appropriate position of the foundation pit 8 during the movement of the support frame 1, and while the steel sheet piles are inserted into the foundation pit 8 to form support, the support installation assembly 5 will support the steel sheet pile structure at intervals through the support frame 7 stored in the second bearing shell 6. When the spare steel sheet piles 4 in the first bearing shell 3 and the support frame 7 in the second bearing shell 6 are used up, they are supplemented at the planned trajectory points until the support work of the entire foundation pit 8 is completed.

[0072] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rainwater and sewage pipe network foundation pit excavation support and protection device, characterized in that: include: A support frame, on which two insertion devices, two first bearing shells, a second bearing shell and a support installation assembly are fixedly arranged, the two insertion devices and the two first bearing shells are mirror-arranged, the two insertion devices correspond to the two first bearing shells one by one, each first bearing shell is arranged in the middle of the corresponding insertion device, the support installation assembly is arranged on one side of the two insertion devices away from the first bearing shell, and the second bearing shell is arranged on the other side of the support installation assembly; A plurality of spare steel sheet piles are provided and are respectively fixedly arranged in the two first bearing shells; A plurality of support frames are provided and fixedly arranged in the second bearing shell; The support and installation assembly includes a fourth horizontal track, the fourth horizontal track is fixedly assembled on the upper surface of a first fixed beam, a fifth horizontal track is horizontally slidably arranged on the fourth horizontal track, the fifth horizontal track is horizontally and vertically arranged with the fourth horizontal track, a second vertical track is vertically slidably arranged on the fifth horizontal track, and a second clamping assembly is fixedly arranged at the lower end of the second vertical track; The second clamping assembly includes a fixed bearing plate, which is fixedly mounted on the lower end of the second vertical track, and two sixth horizontal tracks are horizontally fixedly arranged on the lower surface of the fixed bearing plate; There are two sliding rails, one is fixedly mounted on the lower surface of the fixed bearing plate, and the other is slidably mounted on the two sixth horizontal rails, and two sliding blocks are slidably embedded on each sliding rail. The two sliding blocks on the same sliding rail are mirror-imaged, and a clamping claw is fixedly mounted on the lower end of each sliding block; A driving motor is slidably mounted on two sixth horizontal rails; The support frame includes: Two support blocks are symmetrically arranged and fixedly stacked inside the second bearing shell or at the lower end of the second clamping assembly. The adjacent sides of the two support blocks are each provided with an adjusting screw. The outer threads of the two adjusting screws are provided with a fixed connecting rod, and a transmission device is provided on the outer side of the fixed connecting rod. A plurality of elastic support blocks are provided, and are respectively fixedly embedded on the side surfaces of the two support blocks that are away from each other.

2. A rainwater and sewage pipe network foundation pit excavation support and protection device according to claim 1, characterized in that: The support frame includes four self-driving traveling wheels, and a support column is fixedly arranged on the upper surface of each self-driving traveling wheel. A first fixed beam is horizontally arranged on the upper surface of two support columns on the same side surfaces that are not adjacent to the two first bearing shells, three adjustable beams are fixedly arranged on the inner sides of the two first fixed beams, and two second fixed beams are horizontally fixedly arranged in the middle of the two adjustable beams adjacent to the first bearing shells.

3. A rainwater and sewage pipe network foundation pit excavation support and protection device according to claim 2, characterized in that: The three adjustable beams are all two-section structures. Each adjustable beam is composed of two sections with fixed frames equipped with hydraulic cylinders. The two hydraulic cylinders are fixed to each other. The two second fixed beams are fixedly assembled on the fixed frames adjacent to the two adjustable beams.

4. A rainwater and sewage pipe network foundation pit excavation support and protection device according to claim 2, characterized in that: The insertion device comprises: Two first horizontal rails are horizontally arranged and respectively fixedly mounted on the upper surface of the first fixed beam and the second fixed beam adjacent to the first fixed beam, the two ends of the two first horizontal rails are horizontally fixedly arranged with second horizontal rails, the two first horizontal rails are horizontally slidably arranged with third horizontal rails, and the second horizontal rail adjacent to the support mounting assembly and the third horizontal rail are slidably arranged with vertical first vertical rails; A hydraulic hammering assembly is fixedly mounted on the lower end of a first vertical track slidably mounted on a second horizontal track adjacent to the support mounting assembly; A first clamping assembly, fixedly disposed on the lower end of the first vertical track on the third horizontal track; The drill is slidably arranged on a second horizontal track away from the hydraulic hammer assembly.

5. A rainwater and sewage pipe network foundation pit excavation support and protection device according to claim 1, characterized in that: The two adjusting screws are mutually reversed threads, and meshing threads are respectively arranged at both ends of the fixed connecting rod.

6. A rainwater and sewage pipe network foundation pit excavation support and protection device according to claim 1, characterized in that: Two elastic anti-damage pads are arranged at the lower end of the transmission.

7. A rainwater and sewage pipe network foundation pit excavation support and protection device according to claim 1, characterized in that: The transmission device can be matched with the driving shaft of the driving motor, and the fixed connecting rod is rotated under the transmission of the transmission device.

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