CN112814700A - Shield area foundation pit support structure and construction process - Google Patents
Shield area foundation pit support structure and construction process Download PDFInfo
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- CN112814700A CN112814700A CN202110009978.4A CN202110009978A CN112814700A CN 112814700 A CN112814700 A CN 112814700A CN 202110009978 A CN202110009978 A CN 202110009978A CN 112814700 A CN112814700 A CN 112814700A
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- 238000010276 construction Methods 0.000 title claims abstract description 11
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- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 23
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- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 23
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- 238000009412 basement excavation Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
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Abstract
The utility model belongs to the technical field of the technique of foundation ditch enclosure and specifically relates to a shield district foundation ditch retaining structure and construction process are related to, and it includes the support, the top of support is provided with fixed case, be provided with the rotation section of thick bamboo in the fixed case, rotate a section of thick bamboo through one rotate the seat rotate set up in the fixed case, it is provided with the removal screw rod to slide in the rotation section of thick bamboo, the removal screw rod with a rotation section of thick bamboo threaded connection, the one end of removal screw rod is passed a rotation section of thick bamboo and the fixed case extends to outside the fixed case lateral wall, the removal screw rod extends to the outer one end of fixed case lateral wall and is provided with the supporting plate that is used for enclosing foundation ditch inner wall, be provided with in the fixed case and be used for the drive rotate a pivoted drive assembly, supporting plate is close to or is. This application has the effect that does benefit to and carry out the enclosure to shield district foundation ditch.
Description
Technical Field
The application relates to the technical field of foundation pit bracing, in particular to a shield area foundation pit bracing structure and a construction process.
Background
The foundation pit is an underground space which is often encountered in the design and construction of urban underground building engineering and municipal building engineering, and is used for protecting the stability of the foundation pit during the excavation of a rock soil body in the pit and preventing the collapse and instability of the pit wall of the foundation pit. At present, urban rail transit represented by subways in China develops very rapidly, the most common excavation of subway tunnels is a shield machine, tunnel sections excavated by the tunnels are called shield sections, and foundation pit support is widely applied to the shield sections.
At present, a cement retaining wall is generally used in foundation pit enclosure, after foundation pit excavation is completed, workers firstly prepare concrete mortar, then build a cement-soil wall, and the cement-soil wall further encloses the foundation pit.
Aiming at the related technologies, the inventor thinks that the construction period of the shield area foundation pit enclosure is long and the labor cost is high due to the long setting time of the concrete mortar.
Disclosure of Invention
The application provides a shield area foundation pit enclosure structure and a construction process, which are beneficial to enclosing a shield area foundation pit.
In a first aspect, the application provides a shield area foundation pit support structure, adopts following technical scheme:
the utility model provides a shield district foundation ditch envelope, includes the support, the top of support is provided with fixed case, be provided with a rotation section of thick bamboo in the fixed case, a rotation section of thick bamboo rotate through a rotation seat set up in the fixed case, it is provided with the removal screw rod to slide in the rotation section of thick bamboo, the removal screw rod with a rotation section of thick bamboo threaded connection, the one end of removing the screw rod is passed a rotation section of thick bamboo and fixed case and extend to outside the fixed case lateral wall, the removal screw rod extends to the outer one end of fixed case lateral wall and is provided with the supporting plate that is used for enclosing foundation ditch inner wall, be provided with in the fixed case and be used for the drive a rotation section of thick bamboo pivoted drive assembly, supporting plate is close to or keeps away from through a.
By adopting the technical scheme, the rotating cylinder is arranged in the fixed box in a rotating mode through the rotating seat, the movable screw is in threaded connection with the rotating cylinder, a supporting plate used for enclosing the inner wall of the foundation pit is arranged at one end, extending out of the side wall of the fixed box, of the movable screw, a driving assembly used for driving the rotating cylinder to rotate is arranged in the fixed box, the supporting plate moves towards the direction close to or away from the fixed box through a guiding assembly, when the foundation pit is enclosed, a worker drives the rotating cylinder to rotate through the driving assembly firstly, under the action of the guiding assembly, the rotating cylinder drives the movable screw to move towards the direction away from the fixed box, the movable screw drives the supporting plate to move towards the direction away from the fixed box, the supporting plate abuts against the inner wall of the foundation pit at the moment, and therefore enclosure.
Optionally, the driving assembly comprises a rotating shaft, a driving bevel gear and a driven bevel gear, the rotating shaft is rotatably arranged in the fixed box, the driving bevel gear is sleeved on the rotating shaft, the driven bevel gear is sleeved on the rotating cylinder, the driving bevel gear is meshed with the driven bevel gear, the fixed box is driven by a rotating piece to rotate the rotating shaft, and the fixed box is provided with a control assembly for controlling the rotating direction of the rotating shaft.
Through adopting above-mentioned technical scheme, drive bevel gear and driven bevel gear intermeshing, fixed case rotates through a rotation piece drive axis of rotation, and fixed case is provided with the control assembly who is used for controlling the direction of rotation of axis of rotation, and when the staff rotated through rotating a piece drive axis of rotation, the axis of rotation drove the drive bevel gear and rotates, and drive bevel gear drove driven bevel gear and rotates, and driven bevel gear drove the rotation of rotating cylinder, and then is favorable to improving the stability of rotating cylinder pivoted.
Optionally, the control assembly includes a fixed cylinder, a ratchet and a pawl, the both ends of axis of rotation are passed fixed case and are extended to outside the fixed case lateral wall, the ratchet cup joint in the axis of rotation extends to outside the fixed case lateral wall wherein one end, one side of fixed case is provided with the connecting rod, the fixed cylinder with the connecting rod deviates from the one end of fixed case is connected, the internal sliding of fixed cylinder is provided with the carriage release lever, the both ends of carriage release lever are passed fixed cylinder and are extended to outside the fixed case lateral wall, the pawl with the carriage release lever extends to the outside one end of fixed cylinder lateral wall is connected, the ratchet with pawl intermeshing, fixed cylinder drives through an adjusting part the carriage release lever removes towards the direction that is close to the ratchet.
Through adopting above-mentioned technical scheme, the pawl is connected with the one end that the carriage release lever extends to the outer of solid fixed cylinder lateral wall, ratchet and pawl intermeshing, gu fixed cylinder moves towards the direction that is close to the ratchet through an adjusting part cooperation drive carriage release lever, when rotating a drive axis of rotation and rotating, the axis of rotation drives the ratchet and rotates, under the effect of adjusting part, the pawl butt engages in the surface of ratchet this moment, because there is the unidirectionality ratchet and pawl each other, and then is favorable to improving axis of rotation pivoted stability.
Optionally, the adjusting member is an adjusting spring, a moving block is annularly arranged on a side wall of the moving rod, the moving block is slidably arranged in the fixed cylinder, the adjusting spring is sleeved on the moving rod and arranged in the fixed cylinder, one end of the adjusting spring is connected with one side of the moving block, the other end of the adjusting spring is connected with one inner side of the fixed cylinder, when the adjusting spring is in a natural state, the pawl moves towards a direction close to the ratchet wheel, and the pawl is meshed with the surface of the ratchet wheel.
By adopting the technical scheme, one end of the adjusting spring is connected with one side of the moving block, the other end of the adjusting spring is connected with one inner side of the fixed cylinder, when the pawl is required to be separated from the surface of the ratchet wheel, a worker moves the moving rod in the direction away from the ratchet wheel, the moving rod drives the moving block and the pawl to move in the direction away from the ratchet wheel, the moving block compresses the adjusting spring at the moment, the ratchet wheel is separated from the ratchet wheel, when the worker releases the moving rod, the adjusting spring recovers the natural state at the moment, the adjusting spring drives the moving block to move in the direction close to the ratchet wheel, the moving block finally drives the pawl to move in the direction close to the ratchet wheel, the pawl is meshed with the ratchet wheel at the moment.
Optionally, the rotating part is a hand wheel, the hand wheel is arranged outside the fixed box side wall, and the hand wheel is coaxially connected with one end, extending to the outside of the fixed box side wall, of the rotating shaft.
Through adopting above-mentioned technical scheme, hand wheel and the one end coaxial coupling that the axis of rotation extends to outside the fixed case lateral wall, and when the staff rotated the hand wheel, hand wheel drive axis of rotation rotated, and then was favorable to improving axis of rotation pivoted stability.
Optionally, the guiding assembly comprises a first sliding block, a second sliding block and a plurality of folding rods, a first sliding groove is formed in one side of the fixed box along the length direction of the fixed box, the first sliding block is arranged in the first sliding groove in a sliding manner, one side of the first sliding block penetrates through the first sliding groove and extends out of the side wall of the fixed box, one side of the supporting and protecting plate is provided with a fixed plate, one side of the fixed plate is provided with a second sliding chute along the length direction of the fixed plate, the second sliding block is arranged in the second sliding chute in a sliding manner, one side of the second sliding block penetrates through the second sliding chute and extends to the outside of the side wall of the fixed plate, the folding rods are mutually and rotatably connected, and one end of the folding rod is rotatably connected with one end of the first sliding block extending out of the side wall of the fixed box, the other end of the folding rod is rotatably connected with one end of the second sliding block, which extends out of the side wall of the fixed plate.
Through adopting above-mentioned technical scheme, many folding rod rotates each other and connects, the one end of folding rod and the one end rotation connection outside first slider extends to the fixed block lateral wall, the other end and the second slider of folding rod extend to the fixed plate lateral wall outside one end rotation connection, when the direction that removes fixed case towards keeping away from of removal screw rod, it drives the fixed plate and removes towards the direction of keeping away from fixed case to remove the screw rod, the fixed plate drives many folding rod interfolding swings this moment, the one end of folding rod drives first slider and slides in first spout, the other end of folding rod drives the second slider and slides in the second spout, and then be favorable to improving the stability that a backplate removed towards the direction of keeping away from fixed case.
Optionally, the support includes bottom plate, a telescopic cylinder and telescopic link, a telescopic cylinder set up in the bottom plate top, the telescopic link slide set up in the telescopic cylinder, the one end of telescopic link is passed the top of telescopic cylinder extends to outside the telescopic cylinder top, the telescopic link is fixed in through a retaining member in the telescopic cylinder.
Through adopting above-mentioned technical scheme, the one end of telescopic link passes the top of a telescopic section of thick bamboo and extends to outside the telescopic section of thick bamboo top, and in the telescopic link was fixed in a telescopic section of thick bamboo through a retaining member, when needs drive fixed case and remove towards the direction of keeping away from the bottom plate, the staff removed the telescopic link towards the direction of keeping away from the bottom plate, then the staff readjusts the retaining member, and the telescopic link was fixed in a telescopic section of thick bamboo this moment, and then was favorable to improving foundation pit envelope's suitability.
Optionally, the retaining member is locking bolt and lock nut, the lateral wall of telescopic link runs through and is provided with a plurality of perforation, and is a plurality of the perforation is followed the vertical direction of telescopic link is interval distribution, the lateral wall correspondence of a telescopic cylinder runs through and is provided with the lockhole, the lockhole with the perforation is linked together, locking bolt passes in proper order the lockhole and the perforation extends to outside the telescopic cylinder lateral wall, lock nut with locking bolt extends to the outer one end threaded connection of telescopic cylinder lateral wall.
Through adopting above-mentioned technical scheme, locking bolt passes lockhole and perforation in proper order and extends to outside the telescopic cylinder lateral wall, and lock nut and locking bolt extend to the outer one end threaded connection of telescopic cylinder lateral wall, and when the telescopic link is fixed to needs, the staff pegs graft in lockhole and perforation earlier with locking bolt, then screws up lock nut again, and then is favorable to improving the stability that the carriage release lever is fixed in the telescopic cylinder.
Optionally, foundation ditch envelope is provided with a plurality ofly, and adjacent foundation ditch envelope is connected through a connecting assembly looks transmission, coupling assembling includes first connecting plate, connecting bolt and coupling nut, first connecting plate set up in the axis of rotation deviates from the one end of hand wheel, it is adjacent the one end correspondence of axis of rotation is provided with the second connecting plate, connecting bolt passes in proper order outside first connecting plate and the second connecting plate extended to the second connecting plate lateral wall, coupling nut with connecting bolt extends to the outer one end threaded connection of second connecting plate lateral wall.
By adopting the technical scheme, connecting bolt passes first connecting plate and second connecting plate in proper order and extends to outside the second connecting plate lateral wall, coupling nut extends to the outer one end threaded connection of second connecting plate lateral wall with connecting bolt, when needs drive the axis of rotation in the adjacent foundation ditch enclosure structure and rotate, the staff sets up the second connecting plate in one side of first connecting plate, then it is fixed with first connecting plate and second connecting plate through connecting bolt and coupling nut, when the hand wheel drives the axis of rotation and rotates, the axis of rotation drives the rotation of adjacent axis of rotation, a plurality of foundation ditch enclosure structure's supporting plate is simultaneously enclosed the foundation ditch, and then be favorable to improving foundation ditch enclosure structure's suitability.
The application provides a shield area foundation pit enclosure construction process, which comprises the following steps:
s1: fixing the bottom plate in a shield area foundation pit, adjusting the height of the telescopic rod in the telescopic cylinder to adjust the height position of the fixing box, and then locking and fixing the locking bolt and the locking nut;
s2: then connecting a plurality of foundation pit support structures in parallel through the connecting assembly;
s3: then, the rotating shaft is rotated through the hand wheel, under the action of the driving assembly, the rotating shaft finally drives the rotating cylinder to rotate, and meanwhile, under the action of the guide assembly, the movable screw rod drives the supporting plate to move towards the direction close to the inner wall of the foundation pit, and the supporting plate is used for enclosing the inner wall of the foundation pit;
s4: after the foundation pit supporting is completed, the supporting plate can be reset through the control assembly and the hand wheel.
To sum up, the application comprises the following beneficial technical effects:
when foundation pit enclosure is needed, a worker drives the rotating cylinder to rotate through the driving assembly, under the action of the guiding assembly, the rotating cylinder drives the movable screw to move towards the direction away from the fixed box, the movable screw drives the supporting plate to move towards the direction away from the fixed box, meanwhile, under the action of the control assembly, the supporting plate is fixed at the current position, and the supporting plate abuts against the inner wall of the foundation pit at the moment, so that enclosure of the foundation pit in the shield area is facilitated.
Drawings
Fig. 1 is an overall structure schematic diagram of a shield area foundation pit enclosure structure of the present application.
Fig. 2 is a partial structural sectional view of the stationary box and the stationary barrel of the present application.
Fig. 3 is an enlarged view of a portion a of fig. 2.
Fig. 4 is an enlarged view of a portion B of fig. 2.
Fig. 5 is a schematic view of an assembly relationship of the adjacent shield area foundation pit support structures according to the present application.
Description of reference numerals: 1. a support; 11. a base plate; 12. a telescopic cylinder; 121. a lock hole; 13. a telescopic rod; 131. perforating; 14. locking the bolt; 15. locking the nut; 2. a fixed box; 21. a rotating cylinder; 22. moving the screw; 23. a fixing plate; 24. supporting the guard plate; 25. a rotating seat; 26. a first chute; 27. a second chute; 3. a rotating shaft; 31. a drive bevel gear; 32. a driven bevel gear; 4. a folding bar; 41. a first slider; 42. a second slider; 43. a connecting shaft; 5. a fixed cylinder; 51. a ratchet wheel; 52. a pawl; 53. a travel bar; 54. a lifting block; 55. a moving block; 56. adjusting the spring; 57. a connecting rod; 6. a hand wheel; 7. a first connecting plate; 71. a second connecting plate; 72. a connecting bolt; 73. and connecting a nut.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
Example (b):
referring to fig. 1 and 2, the shield area foundation pit support structure comprises a support 1 arranged on the ground, wherein the support 1 is vertically arranged, and a fixing box 2 is fixedly arranged at the top of the support 1. The fixing box 2 is in a cuboid shape, and the fixing box 2 is arranged in an inner vacuum mode. The fixed box 2 is provided with a rotating cylinder 21 in a rotating manner, the number of the rotating cylinders 21 is three, the three rotating cylinders 21 are distributed in an annular array manner along the center axis of the fixed box 2 respectively, the three rotating cylinders 21 are perpendicular to three inner side surfaces of the fixed box 2 respectively, and the fixed box 2 drives the rotating cylinders 21 to rotate through a driving assembly.
The three rotating cylinders 21 are internally provided with moving screws 22 in a sliding manner, internal threads are arranged in the rotating cylinders 21, the moving screws 22 are in threaded connection with the rotating cylinders 21, and one ends of the moving screws 22 penetrate through the rotating cylinders 21 and the fixed box 2 and extend out of the side wall of the fixed box 2. One end of the movable screw 22 extending to the outside of the side wall of the fixed box 2 is fixedly provided with a fixed plate 23, the fixed plate 23 is perpendicular to the movable screw 22, and one side of the fixed plate 23 departing from the movable screw 22 is fixedly provided with a support plate 24. The supporting plate 24 is used for enclosing the inner wall of the foundation pit, and the cross section of the supporting plate 24 is arc-shaped, so that the supporting plate is favorably adaptive to the inner wall of the foundation pit in the shield area. The support plate 24 is moved toward or away from the stationary box 2 by a guide assembly.
Specifically, referring to fig. 2 and 3, in order to improve the stability of the rotation of the driving rotary cylinder 21, the driving assembly includes a rotating shaft 3, a driving bevel gear 31, and a driven bevel gear 32. The axis of rotation 3 is the level setting, and axis of rotation 3 rotates and sets up in fixed case 2, and axis of rotation 3 and three rotating cylinder 21 dislocation distribution, and the both ends of axis of rotation 3 pass fixed case 2's inside wall respectively and extend to outside fixed case 2 lateral wall. The drive bevel gear 31 is rotatably disposed in the fixed case 2, and the drive bevel gear 31 is fixedly sleeved on the rotating shaft 3. The number of the driven bevel gears 32 is correspondingly set to three, the three driven bevel gears 32 are all rotatably arranged in the fixed box 2, the three driven bevel gears 32 are respectively fixedly sleeved on the three rotating cylinders 21, and the three driven bevel gears 32 are all meshed with the driving bevel gear 31.
It should be noted that, referring to fig. 2, in order to further improve the stability of the rotation of the rotary drum 21 in the fixed box 2, three rotary seats 25 are fixedly arranged in the fixed box 2, and the three rotary drums 21 respectively pass through the three rotary seats 25 and are rotatably connected with the rotary seats 25. When the rotating shaft 3 rotates, the rotating shaft 3 drives the drive bevel gear 31 to rotate, the drive bevel gear 31 simultaneously drives the three driven bevel gears 32 to rotate, and the driven bevel gears 32 further drive the rotating cylinder 21 to rotate.
Specifically, referring to fig. 1 and 2, in order to improve the stability of the movement of the support plate 24 in the direction away from the fixed box 2, the guide assembly includes a folding bar 4, a first slider 41, and a second slider 42. The quantity correspondence of folding rod 4 is established to three groups, and every folding rod 4 of group is equipped with two pairs of folding rods 4, and two pairs of folding rods 4 set up respectively in one side of fixed case 2 towards fixed plate 23, and two pairs of folding rods 4 are the symmetry setting along the vertical axis of fixed plate 23 respectively. Each pair of folding bars 4 is rotatably connected to each other by a connecting shaft 43. Fixed case 2 has seted up first spout 26 towards one side of fixed plate 23 along the length direction of fixed case 2, and first slider 41 slides and sets up in first spout 26, and first spout 26 is passed and outside the lateral wall of fixed case 2 is extended to one side of first slider 41.
The fixed plate 23 is provided with a second sliding groove 27 along the length direction of the fixed plate 23 towards one side of the fixed box 2, the second sliding block 42 is slidably arranged in the second sliding groove 27, and one side of the second sliding block 42 passes through the second sliding groove 27 and extends out of the bottom of the fixed plate 23. One end of the folding rod 4 is rotatably connected with one end of the first sliding block 41 extending to the outside of the side wall of the fixed box 2, and the other end of the folding rod 4 is rotatably connected with one end of the second sliding block 42 extending to the outside of the bottom of the fixed plate 23.
When the rotating cylinder 21 rotates, under the guiding action of the folding rods 4, the rotating cylinder 21 drives the moving screw 22 to move towards the direction away from the fixed box 2, the moving screw 22 drives the fixed plate 23 to move towards the direction away from the fixed box 2, at this time, each pair of folding rods 4 are folded with each other, one end of each folding rod 4 drives the first sliding block 41 to slide in the first sliding groove 26, and the other end of each folding rod 4 drives the second sliding block 42 to slide in the second sliding groove 27.
Specifically, referring to fig. 2 and 4, in order to control the rotation direction of the rotation shaft 3 and improve the stability of the rotation shaft 3, the stationary box 2 is provided with a control assembly. The control assembly includes a fixed barrel 5, a ratchet 51 and a pawl 52. The fixed connecting rod 57 that is provided with of lateral wall of fixed box 2, a solid fixed cylinder 5 is vertical setting, and a solid fixed cylinder 5 deviates from the outer one end fixed connection of fixed box 2 lateral wall with connecting rod 57. The fixed cylinder 5 is provided with a moving rod 53 in a sliding manner, and two ends of the moving rod 53 respectively penetrate through the top and the bottom of the fixed cylinder 5 and respectively extend out of the top and the bottom of the fixed cylinder 5. The lifting block 54 is fixedly arranged at one end of the moving rod 53 extending out of the top of the fixed cylinder 5. The pawl 52 is fixedly connected with one end of the moving rod 53 extending out of the bottom of the fixed cylinder 5. The ratchet wheel 51 is vertically arranged, the ratchet wheel 51 is fixedly sleeved at one end of the rotating shaft 3 extending to the outside of the side wall of the fixed box 2, and the pawl 52 is meshed with the ratchet wheel 51.
Referring to fig. 4, to improve the stability of the pawl 52 engaging the surface of the ratchet wheel 51, the fixed cylinder 5 drives the pawl 52 to move toward the ratchet wheel 51 through an adjusting member, which is an adjusting spring 56. A moving block 55 is provided around the side wall of the moving rod 53, and the moving block 55 is slidably provided in the fixed cylinder 5. The adjusting spring 56 is vertically arranged, the adjusting spring 56 is arranged in the fixed cylinder 5, and the adjusting spring 56 is sleeved on the moving rod 53. One end of the adjusting spring 56 is fixedly connected with the top of the moving block 55, and the other end of the adjusting spring 56 is fixedly connected with the inner side of the top of the fixed cylinder 5.
When the worker pulls the lifting block 54 in a direction away from the ratchet wheel 51, the lifting block 54 drives the moving rod 53 to move in a direction away from the ratchet wheel 51, the moving rod 53 drives the moving block 55 and the pawl 52 to move in a direction away from the ratchet wheel 51, at this time, the moving block 55 presses the adjusting spring 56, and the pawl 52 is separated from the surface of the ratchet wheel 51. When the worker releases the lifting block 54, the adjusting spring 56 returns to the natural state, the adjusting spring 56 drives the moving block 55 to move towards the direction close to the ratchet wheel 51, the moving block 55 drives the moving rod 53 and the pawl 52 to move towards the direction close to the ratchet wheel 51, and the pawl 52 is meshed with the surface of the ratchet wheel 51.
Specifically, referring to fig. 1 and 2, in order to improve the convenience of the worker for rotating the rotating shaft 3, the worker drives the rotating shaft 3 to rotate through a rotating part, the rotating part is a hand wheel 6, the hand wheel 6 is rotatably disposed on one side of the fixed box 2, and the hand wheel 6 and the rotating shaft 3 are coaxially and fixedly connected with each other at one end extending out of the side wall of the fixed box 2. When the worker rotates the hand wheel 6, the hand wheel 6 drives the rotation shaft 3 to rotate.
Specifically, referring to fig. 1 and 2, in order to improve the application range of the foundation pit support structure and facilitate the support plate 24 to support the inner wall of the foundation pit, the support 1 includes a bottom plate 11, a telescopic cylinder 12 and a telescopic rod 13. The number of the bottom plates 11 is two, the bottom plates 11 are arranged horizontally, and the bottom plates 11 are fixedly arranged on the ground. The telescopic cylinder 12 is vertically arranged, and the telescopic cylinder 12 is fixedly arranged at the top of the bottom plate 11. The telescopic rod 13 is vertical setting, and the telescopic rod 13 slides and sets up in the telescopic cylinder 12, and the upper end of telescopic rod 13 passes the top of a fixed section of thick bamboo 5 and extends outside the top of a fixed section of thick bamboo 5.
Referring to fig. 1 and 2, in order to improve the stability of the telescopic rod 13 fixed in the telescopic cylinder 12, a worker fixes the telescopic rod 13 in the telescopic cylinder 12 through a locking member, which is a locking bolt 14 and a locking nut 15. The side wall of telescopic link 13 runs through along telescopic link 13's thickness direction and is provided with a plurality of perforation 131, and a plurality of perforation 131 are interval distribution respectively along telescopic link 13's vertical direction. The side wall of the telescopic cylinder 12 is correspondingly provided with a lock hole 121 in a penetrating manner, and the lock hole 121 is communicated with the through hole 131. The number of the locking bolts 14 and the locking nuts 15 is two, and the locking bolts 14 pass through the locking holes 121 and the through holes 131 and extend out of the side wall of the telescopic cylinder 12. The locking nut 15 is arranged on one side of the telescopic cylinder 12, and the locking nut 15 and the locking bolt 14 are in threaded connection with one end outside the side wall of the telescopic cylinder 12. When the staff need adjust the height of fixed case 2, the staff removes the high position of telescopic link 13 earlier, then screws up lock nut 15 again, under lock bolt 14 and lock nut 15's effect, telescopic link 13 is fixed in telescopic cylinder 12 this moment, and fixed case 2 is fixed in the current position.
Specifically, referring to fig. 5, in order to improve the application range of the use of the foundation pit support structures, a plurality of foundation pit support structures are provided, two adjacent foundation pit support structures are in transmission connection with each other through a connection assembly, and the connection assembly includes a first connection plate 7, a connection bolt 72 and a connection nut 73. The first connecting plate 7 is fixedly arranged at one end of the rotating shaft 3, which is far away from the hand wheel 6. The second connecting plate 71 is fixedly arranged at one end, facing the first connecting plate 7, of the rotating shaft 3 of the adjacent foundation pit support structure, four connecting bolts 72 and four connecting nuts 73 are arranged, the four connecting bolts 72 penetrate through the first connecting plate 7 and the second connecting plate 71 respectively and extend to the outer side wall of the first connecting plate 7, and the connecting nuts 73 and the connecting bolts 72 are connected through threads at one end extending to the outer side wall of the second connecting plate 71. When the staff screws up the connecting nuts 73, at the moment, the foundation pit support structures are sequentially connected, and when one of the rotating shafts 3 rotates, one of the rotating shafts 3 drives the adjacent rotating shaft 3 to rotate through the first connecting plate 7 and the second connecting plate 71, so that the supporting plates 24 of the foundation pit support structures support the inner wall of the foundation pit.
The application provides a shield area foundation pit support structure construction process, which comprises the following steps:
s1: the working personnel fix the bottom plate 11 in the shield area foundation pit firstly, then the working personnel move the telescopic rod 13 towards the direction far away from the bottom plate 11, the telescopic rod 13 drives the fixed box 2 to move towards the direction far away from the ground, and after the fixed box 2 moves to a proper position, the working personnel tighten the locking nut 15 again, under the matching action of the locking bolt 14 and the locking nut 15, the telescopic rod 13 is fixed in the telescopic cylinder 12 at the moment, and the fixed box 2 is fixed at the current position;
s2: then, the worker repeats the first step to fix the bottom plates 11 of the plurality of foundation pit support structures, at the moment, the plurality of foundation pit support structures are distributed at intervals along the length direction of the shield area, the worker tightens the connecting nut 73, and at the moment, the adjacent foundation pit support structures are fixedly connected with each other;
s3: then, the worker rotates the hand wheel 6, the hand wheel 6 drives the rotating shaft 3 to rotate, the rotating shaft 3 drives the ratchet wheel 51 and the driving bevel gear 31 to rotate, the driving bevel gear 31 drives the three driven bevel gears 32 to rotate simultaneously, the driven bevel gears 32 drive the rotating cylinder 21 to rotate, under the guiding action of the folding rod 4, the rotating cylinder 21 drives the moving screw 22 to move towards the direction far away from the fixed box 2, the moving screw 22 finally drives the supporting plate 24 to move towards the direction far away from the fixed box 2, and at the moment, the supporting plate 24 abuts against the inner wall of the foundation pit in the shield area;
s4: when the foundation pit supporting is completed and the supporting plate 24 needs to be reset, a worker pulls the lifting block 54 in the direction away from the ratchet wheel 51, the lifting block 54 drives the moving rod 53 to move in the direction away from the ratchet wheel 51, the moving rod 53 drives the moving block 55 and the pawl 52 to move in the direction away from the ratchet wheel 51, the moving block 55 compresses the adjusting spring 56 at the moment, the pawl 52 is separated from the surface of the ratchet wheel 51, then the worker rotates the hand wheel 6 in the reverse direction, the hand wheel 6 drives the rotating shaft 3 to rotate in the reverse direction at the moment, and the rotating shaft 3 finally drives the supporting plate 24 to move in the direction close to the fixed box 2.
In summary, the shield area foundation pit is advantageously enclosed by driving the support plate 24 to move towards the direction close to the inner wall of the shield area foundation pit.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a shield district foundation ditch retaining structure which characterized in that: comprises a bracket (1), a fixed box (2) is arranged at the top of the bracket (1), a rotating cylinder (21) is arranged in the fixed box (2), the rotating cylinder (21) is rotatably arranged in the fixed box (2) through a rotating seat (25), a movable screw rod (22) is arranged in the rotating cylinder (21) in a sliding manner, the movable screw rod (22) is in threaded connection with the rotating cylinder (21), one end of the movable screw rod (22) penetrates through the rotating cylinder (21) and the fixed box (2) and extends out of the side wall of the fixed box (2), one end of the movable screw rod (22) extending to the outside of the side wall of the fixed box (2) is provided with a supporting plate (24) for enclosing the inner wall of the foundation pit, a driving component for driving the rotating cylinder (21) to rotate is arranged in the fixed box (2), the supporting plate (24) is moved toward or away from the fixed box (2) by a guide assembly.
2. The shield area foundation pit enclosure structure of claim 1, wherein: the drive assembly comprises a rotating shaft (3), a driving bevel gear (31) and a driven bevel gear (32), the rotating shaft (3) is rotatably arranged in the fixed box (2), the driving bevel gear (31) is sleeved on the rotating shaft (3), the driven bevel gear (32) is sleeved on the rotating barrel (21), the driving bevel gear (31) is meshed with the driven bevel gear (32), the fixed box (2) is driven by a rotating piece, the rotating shaft (3) rotates, and the fixed box (2) is provided with a control assembly for controlling the rotating direction of the rotating shaft (3).
3. The shield area foundation pit enclosure structure of claim 2, wherein: the control assembly comprises a fixed cylinder (5), a ratchet wheel (51) and a pawl (52), two ends of the rotating shaft (3) penetrate through the fixed box (2) and extend to the outside of the side wall of the fixed box (2), the ratchet wheel (51) is sleeved on one end of the rotating shaft (3) extending to the outside of the side wall of the fixed box (2), a connecting rod (57) is arranged on one side of the fixed box (2), the fixed cylinder (5) is connected with one end, deviating from the fixed box (2), of the connecting rod (57), a moving rod (53) is arranged in the fixed cylinder (5) in a sliding mode, two ends of the moving rod (53) penetrate through the fixed cylinder (5) and extend to the outside of the side wall of the fixed cylinder (5), the pawl (52) is connected with one end, extending to the outside of the side wall of the fixed cylinder (5), of the ratchet wheel (51) and the pawl (52) are meshed with each other, the fixed cylinder (5) drives the moving rod (53) to move towards the direction close to the ratchet wheel (51) through the matching of an adjusting piece.
4. The shield area foundation pit enclosure structure of claim 3, wherein: the adjusting piece is an adjusting spring (56), a moving block (55) is annularly arranged on the side wall of the moving rod (53), the moving block (55) is arranged in the fixed cylinder (5) in a sliding mode, the adjusting spring (56) is sleeved on the moving rod (53), the adjusting spring (56) is arranged in the fixed cylinder (5), one end of the adjusting spring (56) is connected with one side of the moving block (55), the other end of the adjusting spring (56) is connected with one inner side of the fixed cylinder (5), when the adjusting spring (56) is in a natural state, the pawl (52) moves towards a direction close to the ratchet wheel (51), and the pawl (52) is meshed with the surface of the ratchet wheel (51).
5. The shield area foundation pit enclosure structure of claim 3, wherein: the rotation piece is a hand wheel (6), the hand wheel (6) is arranged outside the side wall of the fixed box (2), and the hand wheel (6) is coaxially connected with one end of the rotation shaft (3) extending to the outside of the side wall of the fixed box (2).
6. The shield area foundation pit enclosure structure of claim 5, wherein: the guide assembly comprises a first sliding block (41), a second sliding block (42) and a plurality of folding rods (4), a first sliding groove (26) is formed in one side of the fixed box (2) along the length direction of the fixed box (2), the first sliding block (41) is arranged in the first sliding groove (26) in a sliding mode, one side of the first sliding block (41) penetrates through the first sliding groove (26) and extends out of the side wall of the fixed box (2), a fixed plate (23) is arranged on one side of the supporting plate (24), a second sliding groove (27) is formed in one side of the fixed plate (23) along the length direction of the fixed plate (23), the second sliding block (42) is arranged in the second sliding groove (27) in a sliding mode, one side of the second sliding block (42) penetrates through the second sliding groove (27) and extends out of the side wall of the fixed plate (23), and the folding rods (4) are connected in a rotating mode, and one end of the folding rod (4) is rotatably connected with one end of the first sliding block (41) extending to the outer side wall of the fixed box (2), and the other end of the folding rod (4) is rotatably connected with one end of the second sliding block (42) extending to the outer side wall of the fixed plate (23).
7. The shield area foundation pit enclosure structure of claim 1, wherein: support (1) includes bottom plate (11), a flexible section of thick bamboo (12) and telescopic link (13), a flexible section of thick bamboo (12) set up in bottom plate (11) top, telescopic link (13) slide set up in a flexible section of thick bamboo (12), the one end of telescopic link (13) is passed the top of a flexible section of thick bamboo (12) extends to outside flexible section of thick bamboo (12) top, telescopic link (13) are fixed in through a retaining member in a flexible section of thick bamboo (12).
8. The shield area foundation pit enclosure structure of claim 7, wherein: the retaining member is locking bolt (14) and lock nut (15), the lateral wall of telescopic link (13) runs through and is provided with a plurality of perforation (131), and is a plurality of perforation (131) are followed the vertical direction of telescopic link (13) is interval distribution, the lateral wall correspondence of telescopic cylinder (12) runs through and is provided with lockhole (121), lockhole (121) with perforation (131) are linked together, locking bolt (14) pass in proper order lockhole (121) and perforation (131) extend to outside telescopic cylinder (12) lateral wall, lock nut (15) with locking bolt (14) extend to the outer one end threaded connection of telescopic cylinder (12) lateral wall.
9. The shield area foundation pit enclosure structure of claim 5, wherein: foundation pit retaining structure is provided with a plurality ofly, and adjacent foundation pit retaining structure is connected through a connecting assembly looks transmission, coupling assembling includes first connecting plate (7), connecting bolt (72) and coupling nut (73), first connecting plate (7) set up in axis of rotation (3) deviates from the one end of hand wheel (6), and is adjacent the one end correspondence of axis of rotation (3) is provided with second connecting plate (71), connecting bolt (72) pass in proper order outside first connecting plate (7) and second connecting plate (71) extend to first connecting plate (71) lateral wall, coupling nut (73) with connecting bolt (72) extend to the outer one end threaded connection of first connecting plate (71) lateral wall.
10. A shield area foundation pit enclosure construction process, which is characterized in that the shield area foundation pit enclosure construction process is based on any one of claims 1 to 9, and comprises the following steps:
s1: the method comprises the steps that a bottom plate (11) is fixed in a shield area foundation pit, then the height position of a fixing box (2) is adjusted by adjusting the height of an expansion rod (13) in an expansion cylinder (12), and then a locking bolt (14) and a locking nut (15) are locked and fixed;
s2: then connecting a plurality of foundation pit support structures in parallel through the connecting assembly;
s3: then, the rotating shaft (3) is rotated through the hand wheel (6), under the action of the driving assembly, the rotating shaft (3) finally drives the rotating cylinder (21) to rotate, meanwhile, under the action of the guiding assembly, the movable screw (22) drives the supporting and protecting plate (24) to move towards the direction close to the inner wall of the foundation pit, and the supporting and protecting plate (24) is used for enclosing the inner wall of the foundation pit;
s4: after the foundation pit supporting is finished, the supporting and protecting plate (24) can be reset through the control assembly and the hand wheel (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110009978.4A CN112814700B (en) | 2021-01-05 | 2021-01-05 | Shield area foundation pit support structure and construction process |
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| CN202110009978.4A CN112814700B (en) | 2021-01-05 | 2021-01-05 | Shield area foundation pit support structure and construction process |
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| CN116398199A (en) * | 2023-05-29 | 2023-07-07 | 中信建设有限责任公司 | Tunnel portal supporting device |
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| CN112814700B (en) | 2023-03-31 |
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