Falling beam descending device for walking type pushing equipment

Abstract

The invention discloses a falling beam descending device for walking type pushing equipment, and belongs to the technical field of bridge construction. Comprising a lower bottom plate, a mounting pipe is arranged in the middle of the lower bottom plate, one end of the mounting pipe is fixed to the lower bottom plate, a sliding column is arranged in the mounting pipe, one end of the sliding column is slidably connected to the interior of the mounting pipe, an upper top plate is arranged at the other end of the sliding column, and the upper top plate is fixed to the other end of the sliding column; the upper top plate is located outside the mounting pipe, the portion, between the sliding column and the lower bottom plate, of the mounting pipe is filled with fine sand, the filling amount of the fine sand is controlled so as to control padding of the walking type pushing equipment, the fine sand is used for supporting the end of the sliding column, and a plurality of sand discharging mechanisms are arranged on the outer side face, close to the lower bottom plate, of the mounting pipe. And the sand discharging mechanism is used for discharging fine sand in the mounting pipe. According to the technical scheme, the beam falling efficiency and the beam falling effect of the walking type pushing equipment are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge construction, and particularly relates to a beam lowering device for a walking jacking equipment. Background Art

[0002] In the traditional walking jacking method, multiple layers of I-beams are usually placed at the bottom of the walking jacking equipment to meet the jacking height of the walking jacking equipment. It can be understood as raising the installation position. After the jacking is completed, when the beam lowering operation is carried out, the I-beams at the bottom need to be extracted to lower the height of the walking jacking machine, and then lower the height of the steel truss to complete the beam lowering.

[0003] However, when the beam lowering operation is achieved by extracting the I-beams, since it is easy to cause the installation position of the beam lowering jacking equipment to shift during the extraction of the I-beams, that is, it is easy to cause the line position to shift during the beam lowering, and accurate beam lowering cannot be achieved. At the same time, the time required to complete the beam lowering is long. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a beam lowering device for a walking jacking equipment to improve the beam lowering efficiency and beam lowering effect of the walking jacking equipment.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A beam lowering device for a walking jacking equipment of the present invention is arranged below the walking jacking equipment and includes a lower bottom plate. An installation pipe is provided in the middle of the lower bottom plate. One end of the installation pipe is fixed on the lower bottom plate. A sliding column is arranged inside the installation pipe. One end of the sliding column is slidably connected inside the installation pipe. The other end of the sliding column is provided with an upper top plate. The upper top plate is fixed to the other end of the sliding column and is located outside the installation pipe. Fine sand is filled inside the installation pipe between the sliding column and the lower bottom plate. By controlling the filling amount of the fine sand, the height of the walking jacking equipment is controlled, and the fine sand is used to support the end of the sliding column. Several sand discharging mechanisms are arranged on the outer side of the installation pipe near the lower bottom plate. The sand discharging mechanisms are used to discharge the fine sand inside the installation pipe, thereby reducing the installation height of the walking jacking equipment and realizing the beam lowering operation.

[0007] Furthermore, the sand discharging mechanism includes a conveying pipe fixed to the outer wall of the installation pipe. One end of the conveying pipe is located in the middle of the installation pipe, and the other end is located outside the installation pipe. A first material hole is provided at the end of the conveying pipe located in the middle of the installation pipe. The first material hole communicates with the inside of the conveying pipe and faces the upper top plate. A second material hole is provided at the other end of the installation pipe. The second material hole communicates with the inside of the installation pipe and faces the lower bottom plate. Both ends of the conveying pipe are closed. A conveying shaft is provided inside the conveying pipe. Conveying blades are wound around the conveying shaft. Both ends of the conveying shaft are respectively rotatably connected to both ends of the conveying pipe. A rotating motor is provided at one end located outside the installation pipe. The output end of the rotating motor is fixed to the end of the conveying shaft. A machine base is provided on the lower bottom plate, and the rotating motor is fixed to the lower bottom plate by the machine base.

[0008] Furthermore, a third material hole is provided above the second material hole. The third material hole communicates with the inside of the conveying pipe. Retaining rings are provided on both sides of the second material hole and the third material hole. The retaining rings are fixed to the conveying pipe. A rotating ring is provided between the two retaining rings. The rotating ring is rotatably connected to the conveying pipe and completely covers the first material hole and the second material hole. A sand storage tank is provided on the outer surface of the rotating ring corresponding to the position of the first material hole. The sand storage tank is fixed to the rotating ring and communicates with the first material hole.

[0009] Furthermore, a column is provided in the middle of the lower bottom plate. One end of the column is fixed to the lower bottom plate, and an umbrella-shaped baffle is provided at the other end of the column. The umbrella-shaped baffle is fixed to the column. There is an installation spacing between the umbrella-shaped baffle and the conveying pipe, and the projection of the umbrella-shaped baffle on the lower bottom plate completely covers the first material hole.

[0010] Furthermore, a sector gear is provided on the conveying shaft. A rack perpendicular to the conveying shaft is provided on the lower bottom plate below the conveying shaft. The rack is slidably provided on the lower bottom plate. A first fixing plate is provided on the lower bottom plate on one side of the rack. A first cylindrical housing is provided on the side surface of the first fixing plate facing the installation pipe. One end of the first cylindrical housing is fixed to the first fixing plate. A first spring is provided inside the first cylindrical housing. A first impact roller is provided at the end of the first spring facing the other end of the first cylindrical housing. The first impact roller is fixed to the first spring. A first pull rope is provided at the end of the first impact roller. One end of the first pull rope is fixed to the first impact roller, and the other end of the first pull rope passes through the first fixing block and is connected to the end of the rack.

[0011] Furthermore, a second fixing plate is provided on the lower bottom plate on the other side of the rack. A second cylindrical housing is provided on one side of the second fixing plate facing the installation pipe. One end of the second cylindrical housing is fixed to the second fixing plate. A second spring is provided inside the second cylindrical housing. A second impact roller is provided at the end of the second spring facing the other end of the second cylindrical housing. The second impact roller is fixed to the second spring. A second pulling rope is provided at the end of the second impact roller. One end of the second pulling rope is fixed to the second impact roller. A guide rod is provided at the other end of the second pulling rope. One end of the guide rod is fixed to the other end of the second pulling rope. The other end of the guide rod is fixed to the other end of the rack.

[0012] Furthermore, a guide post is provided on the lower bottom plate, and the guide post is used to control the force angle of the first pulling rope.

[0013] Furthermore, the fine sand is dry sand.

[0014] The beneficial effects of the present invention are as follows:

[0015] In this technical solution, the discharge of the fine sand in the installation pipe is controlled by the sand discharge mechanism, thereby realizing the descent of the sliding column, and then realizing the falling of the beam. This way of falling the beam can quickly fall the beam after the jacking is completed, greatly improving the efficiency of the beam falling operation of the bridge, and realizing accurate vertical beam falling while ensuring the construction quality and safety.

[0016] Other advantages, objectives and features of the present invention will be described in the following description, and to some extent will be obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0018] Figure 1 It is a three-dimensional schematic diagram of the beam falling and descending device of the present invention;

[0019] Figure 2 It is a three-dimensional schematic diagram of the arrangement of components such as the conveying pipe in the beam falling and descending device of the present invention;

[0020] Figure 3 It is a top view schematic diagram of the arrangement of components such as the conveying pipe in the beam falling and descending device of the present invention;

[0021] Figure 4 It is a schematic diagram of the beam falling and descending device of the present invention for raising the installation bottom plate of the walking jacking equipment;

[0022] Figure 5 For the present invention Figure 4 is a partially enlarged schematic view of part A in the present invention.

[0023] The labels in the attached drawings are as follows:

[0024] 1. Lower bottom plate; 2. Installation pipe; 3. Sliding column; 4. Upper top plate; 5. Fine sand; 6. Conveying pipe; 7. First material hole; 8. Second material hole; 9. Conveying shaft; 10. Conveying blade; 11. Machine base; 12. Rotating motor; 13. Third material hole; 14. Rotating ring; 15. Sand storage tank; 16. Retaining ring; 17. Column; 18. Umbrella-shaped baffle; 19. Sector gear; 20. Slide rail; 21. Rack; 22. First fixing plate; 23. First cylindrical housing; 24. First spring; 25. First impact roller; 26. First pull rope; 27. Guide post; 28. Guide rod; 29. Second fixing plate; 30. Second cylindrical housing; 31. Second spring; 32. Second impact roller; 33. Installation bottom plate. Specific embodiments

[0025] As Figures 1 to 5 shown, a beam lowering device for a walking jacking device of the present invention is arranged below the walking jacking device and is connected to the installation bottom plate 33 of the walking jacking device. Specifically, it includes a lower bottom plate 1. A middle part of the lower bottom plate 1 is provided with an installation pipe 2. One end of the installation pipe 2 is fixed on the lower bottom plate 1. Inside the installation pipe 2, there is a sliding column 3. The diameter of the sliding column 3 can be the same as the inner diameter of the installation pipe 2. Of course, a sliding piston block can be arranged at the end of the sliding column 3. The outer diameter of the sliding piston block matches the inner diameter of the installation pipe 2. One end of the sliding column 3 is slidably connected inside the installation pipe 2. The other end of the sliding column 3 is provided with an upper top plate 4. The upper top plate 4 is fixed to the other end of the sliding column 3 and is located outside the installation pipe 2. The inside of the installation pipe 2 between the sliding column 3 and the lower bottom plate 1 is filled with fine sand 5. By controlling the filling amount of the fine sand 5, the height of the walking jacking device can be controlled, and the fine sand 5 is used to support the end of the sliding column 3. The outer side of the installation near the lower bottom plate 1 is provided with a plurality of sand discharging mechanisms, and the sand discharging mechanisms are used to discharge the fine sand 5 inside the installation pipe 2, thereby reducing the installation height of the walking jacking device and thus realizing the beam lowering operation.

[0026] The working principle of the above technical solution is as follows:

[0027] When installing this beam lowering device, first, according to the elevation required by the walking jacking equipment, an appropriate amount of fine sand 5 is filled into the installation pipe 2. Then, the sliding column 3 is placed in the installation pipe 2. After that, the installation bottom plate 33 is installed on the upper top plate 4. When the jacking work is completed and the beam lowering operation needs to be carried out, only by means of the sand discharging mechanism, the fine sand 5 at the bottom of the installation pipe 2 is extracted. Then, the upper fine sand 5 will grout and move down to fill the gap where the fine sand 5 is discharged, thereby reducing the height of the sliding column 3. Furthermore, the height of the walking jacking equipment can be reduced, and then the height of the bridge truss can be reduced, thus realizing the beam lowering operation. This kind of beam lowering method can quickly lower the beam after the jacking is completed, greatly improving the efficiency of the bridge beam lowering operation. Under the condition of ensuring the construction quality and safety, accurate beam lowering can be achieved.

[0028] In an implementable manner, the sand discharging mechanism includes a conveying pipe 6. The conveying pipe 6 is fixed on the outer wall of the installation pipe 2, and one end of the conveying pipe 6 is located in the middle of the installation pipe 2, and the other end of the conveying pipe 6 is located outside the installation pipe 2. A first material hole 7 is provided at one end of the conveying pipe 6 located in the middle of the installation pipe 2. The first material hole 7 is communicated with the inside of the conveying pipe 6, and the first material hole 7 is arranged facing the upper top plate 4. A second material hole 8 is provided at the other end of the installation pipe 2. The second material hole 8 is communicated with the inside of the installation pipe 2, and the second material hole 8 is arranged facing the lower bottom plate 1. Both ends of the conveying pipe 6 are closed. A conveying shaft 9 is arranged inside the conveying pipe 6. A conveying blade 10 (spiral blade) is wound on the conveying shaft 9. Both ends of the conveying shaft 9 are respectively rotatably connected to both ends of the conveying pipe 6. And a rotary motor 12 is provided at one end located outside the installation pipe 2. The output end of the rotary motor 12 is fixed to the end of the conveying shaft 9. A machine base 11 is provided on the lower bottom plate 1, and the machine base 11 fixes the rotary motor 12 on the lower bottom plate 1.

[0029] The working principle of the above technical solution is as follows:

[0030] When the beam needs to be lowered, control the rotary motor 12 to start (manual rotation of the conveying shaft 9 is also possible), which will drive the conveying shaft 9 to rotate, and then drive the spiral blade to rotate. The rotation of the spiral blade will convey the fine sand 5 entering from the first material hole 7 outward and discharge it from the second material hole 8, thereby realizing the discharge of the fine sand 5 and the height reduction of the walking jacking equipment.

[0031] In an implementable manner, a third material hole 13 is provided above the second material hole 8. The third material hole 13 is communicated with the inside of the conveying pipe 6. Both sides of the second material hole 8 and the third material hole 13 are provided with retaining rings 16. The retaining rings 16 are fixed on the conveying pipe 6. A rotating ring 14 is arranged between the two retaining rings 16. The rotating ring 14 is rotatably connected to the conveying pipe 6 and completely covers the first material hole 7 and the second material hole 8. A sand storage tank 15 is provided on the outer surface of the rotating ring 14 corresponding to the position of the first material hole 7. The sand storage tank 15 is fixed on the rotating ring 14 and is communicated with the first material hole 7.

[0032] The sand storage tank 15 will collect the discharged fine sand 5. After the beam lowering operation is completed, the beam lowering device can be removed. The purpose of removal is to reduce the pressure of the internal fine sand 5 to facilitate the transportation of the fine sand 5. Then, control the rotation motor 12 to reverse. During the reverse process, rotate the sand storage tank 15 to the upper side so that the sand storage tank 15 communicates with the third material hole 13. Then, the fine sand 5 enters the third material hole 13 and is transported into the interior of the installation pipe 2 under the action of the conveying blade 10. Of course, it is not difficult to understand that the end of the conveying pipe 6 located inside the installation pipe 2 can be partially closed, or a fourth material hole can be provided directly below the first material hole 7 to facilitate the discharged fine sand 5 to be discharged into the installation pipe 2. The advantage of this method is that the fine sand 5 can be collected and recycled, improving the usage efficiency and filling rate of the fine sand 5.

[0033] In an implementable manner, a column 17 is provided in the middle of the lower bottom plate 1. One end of the column 17 is fixed to the lower bottom plate 1, and an umbrella-shaped baffle 18 is provided at the other end of the column 17. The umbrella-shaped baffle 18 is fixed to the column 17. There is an installation spacing between the umbrella-shaped baffle 18 and the conveying pipe 6, and the projection of the umbrella-shaped baffle 18 on the lower bottom plate 1 completely covers the first material hole 7.

[0034] The umbrella-shaped baffle 18 shields the first material hole 7 to prevent the pressure of the sliding column 3 from being vertically transmitted to the fine sand 5 in the first material hole 7 (mainly the vertical pressure), which may cause excessive pressure and the problem that the conveying blade 10 cannot rotate smoothly. Of course, the set installation spacing is to allow the fine sand 5 in other areas to flow into the first material hole 7. The umbrella-shaped setting method will not block the flow of the fine sand 5, and the fine sand 5 can slide down along the inclined surface, improving the flow effect of the fine sand 5.

[0035] In an implementable manner, a sector gear 19 is provided on the conveying shaft 9, and a rack 21 perpendicular to the conveying shaft 9 is provided on the lower bottom plate 1 below the conveying shaft 9. The rack 21 is slidably arranged on the lower bottom plate 1. The sliding method is that a slide rail 20 is provided on the lower bottom plate 1, and the rack 21 is slidably connected to the slide rail 20, that is, it can move horizontally but not up and down. On one side of the rack 21 on the lower bottom plate 1, there is a first fixing plate 22. On the side surface of the first fixing plate 22 facing the installation pipe 2, there is a first cylindrical shell 23. One end of the first cylindrical shell 23 is fixed to the first fixing plate 22. Inside the first cylindrical shell 23, there is a first spring 24. At the end of the first spring 24 facing the other end of the first cylindrical shell 23, there is a first impact roller 25. The first impact roller 25 is fixed to the first spring 24. At the end of the first impact roller 25, there is a first pulling rope 26. One end of the first pulling rope 26 is fixed to the first impact roller 25, and the other end of the first pulling rope 26 passes through the first fixing block and is connected to the end of the rack 21.

[0036] When the rotary motor 12 rotates for sand discharging operation, the rotation of the sector gear 19 will push the rack 21 to move, thereby pulling the first pull rope 26, and then compressing the first spring 24. When the sector gear 19 rotates away from the rack 21, the rack 21 loses the external force, and under the action of the first spring 24, it will reset. Then, the restoring force of the first spring 24 acts on the first impact roller 25, causing the first impact roller 25 to impact the installation pipe 2, thereby driving the fine sand 5 inside the installation pipe 2 to vibrate, and further destroying the contact state between the fine sands 5 (the fine sands 5 are under pressure and may maintain a relatively stable state with low fluidity), thereby improving the fluidity of the fine sands 5 when they are under pressure and ensuring the sand discharging effect.

[0037] In an implementable manner, a second fixed plate 29 is provided on the lower bottom plate 1 on the other side of the rack 21. A second cylindrical housing 30 is provided on the side surface of the second fixed plate 29 facing the installation pipe 2. One end of the second cylindrical housing 30 is fixed to the second fixed plate 29. A second spring 31 is provided inside the second cylindrical housing 30. A second impact roller 32 is provided at the end of the second spring 31 facing the other end of the second cylindrical housing 30. The second impact roller 32 is fixed to the second spring 31. A second pull rope is provided at the end of the second impact roller 32. One end of the second pull rope is fixed to the second impact roller 32, and a guide rod 28 is provided at the other end of the second pull rope. One end of the guide rod 28 is fixed to the other end of the second pull rope, and the other end of the guide rod 28 is fixed to the other end of the rack 21.

[0038] In this specific implementation manner, the working principle of the second impact roller 32 is the same as that of the first impact roller 25, and will not be elaborated here. The difference is that since the second pull rope can be pulled but cannot transmit the pushing moment, the guide rod 28 is provided to drive the second pull rope to move and then compress the second spring 31. This setting method can make the first impact roller 25 and the second impact roller 32 on both sides act on the installation pipe 2 when the sector gear contacts the rack 21, and impact from multiple angles and positions to improve the flow effect of the internal fine sand 5.

[0039] In an implementable manner, a guide post 27 is provided on the lower bottom plate 1 to control the force angle of the first pull rope 26. The traction path of the first pull rope 26 is improved, which can be understood as the setting method of a fixed pulley.

[0040] In an implementable manner, the fine sand 5 is dry sand, and the fluidity of the fine sand 5 is better, improving the sand discharging effect.

[0041] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A beam lowering device for a walking jacking equipment, which is arranged below the walking jacking equipment, and is characterized in that: It includes a lower bottom plate (1). In the middle of the lower bottom plate (1), there is an installation pipe (2). One end of the installation pipe (2) is fixed on the lower bottom plate (1). Inside the installation pipe (2), there is a sliding column (3). One end of the sliding column (3) is slidably connected inside the installation pipe (2). At the other end of the sliding column (3), there is an upper top plate (4). The upper top plate (4) is fixed at the other end of the sliding column (3), and the upper top plate (4) is located outside the installation pipe (2). Fine sand (5) is filled inside the installation pipe (2) between the sliding column (3) and the lower bottom plate (1). By controlling the filling amount of the fine sand (5), the heightening of the walking jacking equipment is controlled, and the fine sand (5) is used to support the end of the sliding column (3). On the outer side of the installation near the lower bottom plate (1), there are several sand discharging mechanisms. The sand discharging mechanisms are used to discharge the fine sand (5) inside the installation pipe (2), thereby reducing the installation height of the walking jacking equipment and realizing the beam lowering operation.

2. The beam lowering device for a walking type jacking equipment according to claim 1, characterized in that: The sand discharging mechanism includes a conveying pipe (6). The conveying pipe (6) is fixed on the outer wall of the installation pipe (2). One end of the conveying pipe (6) is located in the middle of the installation pipe (2), and the other end of the conveying pipe (6) is located outside the installation pipe (2). At one end of the conveying pipe (6) located in the middle of the installation pipe (2), there is a first material hole (7). The first material hole (7) is communicated with the inside of the conveying pipe (6). The first material hole (7) is arranged facing the upper top plate (4). At the other end of the installation pipe (2), there is a second material hole (8). The second material hole (8) is communicated with the inside of the installation pipe (2), and the second material hole (8) is arranged facing the lower bottom plate (1). Both ends of the conveying pipe (6) are closed. Inside the conveying pipe (6), there is a conveying shaft (9). On the conveying shaft (9), there is a conveying blade (10) wound. The two ends of the conveying shaft (9) are respectively rotatably connected to the two ends of the conveying pipe (6). At one end located outside the installation pipe (2), there is a rotary motor (12). The output end of the rotary motor (12) is fixed on the end of the conveying shaft (9). On the lower bottom plate (1), there is a machine base (11). The machine base (11) fixes the rotary motor (12) on the lower bottom plate (1).

3. The beam lowering device for a walking jacking device according to claim 2, characterized in that: Above the second material hole (8), there is a third material hole (13). The third material hole (13) is communicated with the inside of the conveying pipe (6). On both sides of the second material hole (8) and the third material hole (13), there are retaining rings (16). The retaining rings (16) are fixed on the conveying pipe (6). Between the two retaining rings (16), there is a rotating ring (14). The rotating ring (14) is rotatably connected to the conveying pipe (6) and completely covers the first material hole (7) and the second material hole (8). On the outer surface of the rotating ring (14) corresponding to the position of the first material hole (7), there is a sand storage tank (15). The sand storage tank (15) is fixed on the rotating ring (14), and the sand storage tank (15) is communicated with the first material hole (7).

4. The beam lowering device for a walking jacking device according to claim 2, characterized in that: A column (17) is provided in the middle of the lower bottom plate (1). One end of the column (17) is fixed to the lower bottom plate (1), and an umbrella-shaped baffle (18) is provided at the other end of the column (17). The umbrella-shaped baffle (18) is fixed to the column (17). There is an installation spacing between the umbrella-shaped baffle (18) and the conveying pipe (6), and the projection of the umbrella-shaped baffle (18) on the lower bottom plate (1) completely covers the first material hole (7).

5. The beam lowering device for a walking type pushing device according to claim 2, wherein: A sector gear (19) is provided on the conveying shaft (9). A rack (21) perpendicular to the conveying shaft (9) is provided on the lower bottom plate (1) below the conveying shaft (9). The rack (21) is slidably arranged on the lower bottom plate (1). A first fixing plate (22) is provided on the lower bottom plate (1) on one side of the rack (21). A first cylindrical shell (23) is provided on the side surface of the first fixing plate (22) facing the installation pipe (2). One end of the first cylindrical shell (23) is fixed to the first fixing plate (22). A first spring (24) is provided inside the first cylindrical shell (23). A first impact roller (25) is provided at the end of the first spring (24) facing the other end of the first cylindrical shell (23). The first impact roller (25) is fixed to the first spring (24). A first pulling rope (26) is provided at the end of the first impact roller (25). One end of the first pulling rope (26) is fixed to the first impact roller (25), and the other end of the first pulling rope (26) passes through the first fixing block and is connected to the end of the rack (21).

6. The beam lowering device for a walking jacking device according to claim 5, characterized in that: A second fixing plate (29) is provided on the lower bottom plate (1) on the other side of the rack (21). A second cylindrical shell (30) is provided on the side surface of the second fixing plate (29) facing the installation pipe (2). One end of the second cylindrical shell (30) is fixed to the second fixing plate (29). A second spring (31) is provided inside the second cylindrical shell (30). A second impact roller (32) is provided at the end of the second spring (31) facing the other end of the second cylindrical shell (30). The second impact roller (32) is fixed to the second spring (31). A second pulling rope is provided at the end of the second impact roller (32). One end of the second pulling rope is fixed to the second impact roller (32), and a guide rod (28) is provided at the other end of the second pulling rope. One end of the guide rod (28) is fixed to the other end of the second pulling rope, and the other end of the guide rod (28) is fixed to the other end of the rack (21).

7. The beam lowering device for a walking jacking device according to claim 5, characterized in that: A guide post (27) is provided on the lower bottom plate (1) to control the force angle of the first pulling rope (26).

8. The beam lowering device for a walking jacking device according to claim 1, characterized in that: The fine sand (5) is dry sand.

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