CN114197484A - Excavation-following and protection-following deep foundation pit support structure and support method thereof - Google Patents
Excavation-following and protection-following deep foundation pit support structure and support method thereof Download PDFInfo
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- CN114197484A CN114197484A CN202111578202.0A CN202111578202A CN114197484A CN 114197484 A CN114197484 A CN 114197484A CN 202111578202 A CN202111578202 A CN 202111578202A CN 114197484 A CN114197484 A CN 114197484A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000008093 supporting effect Effects 0.000 claims abstract description 94
- 238000009412 basement excavation Methods 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 4
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- 238000012544 monitoring process Methods 0.000 abstract 1
- 101150054854 POU1F1 gene Proteins 0.000 description 36
- 230000001681 protective effect Effects 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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Abstract
The invention relates to a deep foundation pit support structure capable of being protected along with excavation and a support method thereof, and the support structure comprises two symmetrical support columns fixedly connected to the inner wall of the bottom of a foundation pit, wherein the inner wall of one side, away from each other, of the foundation pit is provided with a guard plate, the tops of the support columns are fixedly connected with a cross rod through bolts, the top of the cross rod is fixedly connected with a driving motor, the outer wall of a rotating shaft in the cross rod is fixedly sleeved with a first bevel gear, an output shaft of the driving motor extends into the cross rod and is fixedly connected with the top end of the rotating shaft, two groups of first support components for supporting the foundation pit are arranged in the cross rod, the top ends of the support columns are provided with rectangular through holes, the inner wall of the bottom of the cross rod is fixedly embedded with a circular ring, the bottom end of the rotating shaft penetrates through the circular ring and is fixedly connected with a straight gear, and the bottom of the cross rod is provided with two groups of second support components for supporting the foundation pit; the problem of envelope's recoverability among the prior art is poor, can't be based on the foundation ditch deformation and strut, can't real time monitoring foundation ditch's deformation degree is solved.
Description
Technical Field
The invention belongs to the technical field of foundation pit support, and relates to a support structure of a deep foundation pit capable of being supported along with excavation and a support method thereof.
Background
In urban centers with dense buildings, excavation of deep foundation pits becomes an important issue for geotechnical engineering. The foundation pit enclosure system is an organism with mutual combined action of soil and a supporting structure, and has higher requirements on the safety of the foundation pit enclosure system due to the restriction of factors such as surrounding buildings, underground pipelines and the like. The enclosure of the foundation pit not only ensures the stability of the foundation pit and the safety and convenience of operation in the pit, but also ensures that the displacement of the soil at the bottom of the pit and outside the pit is controlled within a certain range, thereby ensuring the normal use of adjacent buildings and municipal facilities.
In the prior art, the foundation pit enclosure usually needs to be formed by pouring an inclined support column and a special steel pipe for enclosing the inner wall of the foundation pit, and the poured foundation pit with the ultra-large area adopts an enclosure structure and inner support form, so that the foundation pit excavation is influenced, and the construction efficiency is low; the utility model discloses a construction method of bearing support, including bearing support, bearing support is used for the bearing support, and the foundation.
Disclosure of Invention
In view of the above, the invention provides an excavation-following protection-following foundation pit enclosure structure, which aims to solve the problems that in the prior art, the enclosure structure is poor in recoverability, cannot be supported according to foundation pit deformation, and cannot monitor the deformation degree of the foundation pit in real time.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a deep basal pit retaining structure is protected along with digging, two symmetrical support columns including fixed connection at foundation ditch bottom inner wall, one side inner wall that the foundation ditch kept away from each other all is equipped with the containment plate, bolt fixedly connected with horizontal pole is passed through at the top of support column, the top fixedly connected with driving motor of horizontal pole, it is connected with the pivot to be longitudinal rotation in the horizontal pole, the fixed cover of outer wall of pivot is equipped with first bevel gear, driving motor's output shaft extend to in the horizontal pole and with the top fixed connection of pivot, be equipped with two sets of first fender subassemblies that are used for carrying out the enclosure to the foundation ditch in the horizontal pole, the top of support column is equipped with the rectangle through-hole, the fixed ring that is inlayed and is equipped with of bottom inner wall of horizontal pole, the bottom of pivot is rotated and is run through ring and fixedly connected with straight-tooth gear, the bottom of horizontal pole is equipped with two sets of second fender subassemblies that are used for carrying out the enclosure to the foundation ditch.
Further, first enclosure subassembly includes the fixed block of fixed connection in the horizontal pole, the threaded rod runs through in the fixed block internal rotation, the threaded rod is close to the one end fixedly connected with second bevel gear of pivot, and second bevel gear meshes with first bevel gear mutually, sliding connection has the transverse support pole in the horizontal pole, a plurality of sliding trays have been arranged to the outer wall annular of horizontal pole, sliding connection has the slider in the sliding tray, and the top of slider rotates and is connected with the dwang, the one end that the slider was kept away from to the dwang rotates and is connected with the first fixed plate that touches mutually with the enclosure board, the equidistance is equipped with a plurality of first screw holes in the first fixed plate, the one end that the dwang was kept away from to the slider extends to in the horizontal pole and with transverse support pole fixed connection, and the one end that the pivot was kept away from to the threaded rod extends to in the transverse support pole.
Further, sliding connection has the nut piece with threaded rod threaded connection in the horizontal pole, a plurality of spouts of having arranged in one side annular that the nut piece is close to horizontal bracing piece, sliding connection has the pressure sensor who touches with horizontal bracing piece in the spout, the first spring of one end fixedly connected with of horizontal bracing piece is kept away from to pressure sensor, and one side inner wall fixed connection of horizontal bracing piece is kept away from to the other end of first spring and spout, one side that horizontal bracing piece is close to the nut piece is equipped with a plurality of circular slots, one side that the nut piece is close to horizontal bracing piece is equipped with a plurality of slide bars, and the other end of slide bar slides and extends to circular slot and fixedly connected with circular block, the top inner wall and the equal fixedly connected with stopper of bottom inner wall of circular slot.
Further, the second enclosure subassembly includes the base of sliding connection in the horizontal pole bottom, and the base internal rotation is connected with the down tube, and the bottom rotation of down tube is connected with the set-square, and the right-angle side of set-square touches mutually with the bottom inner wall of one side of enclosing the backplate and foundation ditch respectively, and one side fixedly connected with connecting block that the base is close to the support column, and the bottom sliding connection of horizontal pole has the rack that runs through the rectangle through-hole, and rack and straight-teeth gear mesh mutually, and one side and rack fixed connection of base are kept away from to the connecting block.
Further, the top fixedly connected with protection casing of horizontal pole, and driving motor are located the protection casing, can protect for driving motor through the protection casing, avoid driving motor to appear damaging in the work progress.
Further, the nut piece is close to a plurality of rubber blocks of one side fixedly connected with of horizontal bracing piece, and the rubber block touches with horizontal bracing piece mutually, when the nut piece promoted horizontal bracing piece and slided to the outside, can play the cushioning effect through the rubber block.
Furthermore, the one end fixedly connected with connecting plate of horizontal pole is kept away from to horizontal bracing piece, and the connecting plate is kept away from one side of horizontal bracing piece and is touched with the fender apron, and a plurality of second screw holes have been arranged to the equidistance in the connecting plate, can be connected fender apron and connecting plate through the second screw hole, and can increase the area of stress of horizontal bracing piece and fender apron through the connecting plate, avoid horizontal bracing piece will fender apron extrusion deformation.
Furthermore, the top fixedly connected with second fixed plate of set-square, and the top of second fixed plate and the first fixed plate fixed connection that is located the horizontal pole below are equipped with the second bolt in the second fixed plate, and the one end that the support column was kept away from to the second bolt is connected with fender apron threaded connection, is connected the set-square with the first fixed plate that is located the horizontal pole below through the second fixed plate, and then can increase the enclosure power to fender apron.
Furthermore, a hollow groove is arranged in the triangular plate, two symmetrical baffle plates are movably matched with the inner wall of one side of the triangular plate far away from the diagonal rod, two groups of symmetrical first bolts are arranged on one side of the triangular plate near the diagonal rod, one end of each first bolt far away from the diagonal rod is in threaded connection with the baffle plates, a hollow pipe which is in contact with the inner wall of the bottom of the foundation pit penetrates through the triangular plate, one side of the hollow pipe far away from the diagonal rod is in contact with the guard plate, a plurality of circular through holes which are positioned in the hollow groove are arranged in the hollow pipe, the hollow pipe is inserted into the triangular plate, concrete is poured into the hollow pipe through the top end of the hollow pipe, the concrete in the hollow pipe enters the hollow groove through the circular through holes, a certain supporting effect is achieved on the guard plate after the concrete is solidified, when the supporting structure needs to be dismounted, the first bolts are unscrewed, the connection between the triangular plate and the baffle plates is taken out from the hollow groove to two sides, and the triangular plate and the baffle plate can be recovered.
A supporting method of a following excavation and following protection deep foundation pit support structure comprises the following steps:
s1, fixing the cross rod at the top end of the support column through a bolt, starting a driving motor to drive the rotating shaft to rotate, enabling the first bevel gear to be meshed with the second bevel gear, enabling the second bevel gear to drive the threaded rod to rotate, enabling the threaded rod to be in threaded connection with the nut block, and enabling the nut block to push the transverse support rod and the sliding block to slide outwards until the connecting plate and the first fixing plate are both in contact with the enclosure plate;
s2, the connecting plates are respectively and fixedly connected with the containment plate through the first threaded hole and the second threaded hole, the threaded rod continues to rotate, the nut block continues to push the transverse supporting rod and the rotating rod outwards, at the moment, the pressure sensor enters the sliding groove under the reaction force of the transverse supporting rod, the first spring is compressed, the threaded rod stops rotating until the pressure applied to the pressure sensor reaches a set value, when the rotating shaft rotates to drive the threaded rod to rotate, the rotating shaft drives the rack to slide outwards through the straight gear due to the fact that the straight gear is meshed with the rack, and the rack simultaneously pushes the inclined rod and the triangular plate outwards through the connecting block;
s3, when the foundation pit is expanded and deformed, the pressure born by the pressure sensor begins to be reduced, when the pressure born by the pressure sensor is reduced to a certain threshold value, the driving motor is started to drive the rotating shaft to rotate, so that the transverse supporting rod, the sliding block, the rotating rod and the triangular plate can continue to move outwards until the pressure value born by the pressure sensor becomes an initial set value, and the inclined rod, the transverse supporting rod and the rotating rod can continue to support the deformed foundation pit;
s4, when the foundation pit is deformed by inward shrinkage, the pressure born by the pressure sensor begins to increase, when the pressure born by the pressure sensor increases to a certain threshold value, the driving motor is started to drive the rotating shaft to rotate, so that the transverse supporting rod, the sliding block, the rotating rod and the triangular plate can move inwards until the pressure value born by the pressure sensor becomes an initial set value again, the inclined rod, the transverse supporting rod and the rotating rod can continue to support the deformed foundation pit, and further the deformation and bending caused by overlarge bearing pressure of the rotating rod and the inclined rod are avoided, so that the safety risk of a foundation pit structure or the surrounding environment is caused, in addition, the pressure sensor timely transmits pressure change data to a foundation pit support personnel, and the foundation pit support personnel can conveniently obtain the foundation pit deformation data in time;
s5, when pressure values detected by a plurality of pressure sensors in the same nut block are different, the deformation strength of different positions of the inner wall of the foundation pit can be accurately detected through the pressure sensors, and therefore, later foundation pit support personnel can conveniently take corresponding measures;
s6, after the foundation pit construction is finished, the apron plates are removed through the first threaded holes and the second threaded holes to fix the first fixing plate and the connecting plate respectively, the driving motor is started to drive the rotating shaft to rotate, the nut block drives the sliding rod to move towards the middle, the round block is in contact with the limiting block, the transverse supporting rod can be driven to move towards the middle, the transverse supporting rod can be driven, the sliding block and the base can slide towards the middle, supporting of the foundation pit is removed, then the bolt is unscrewed, connection between the supporting column and the transverse rod is removed, and the supporting structure can be recovered.
The invention has the beneficial effects that:
1. according to the excavation-following deep foundation pit support structure disclosed by the invention, when the foundation pit deforms in an expanding mode, the pressure born by the pressure sensor begins to be reduced, when the pressure born by the pressure sensor is reduced to a certain threshold value, the driving motor is started to drive the rotating shaft to rotate, so that the transverse supporting rod, the sliding block, the rotating rod and the triangular plate can continue to move outwards until the pressure value born by the pressure sensor becomes an initial set value, and then the inclined rod, the transverse supporting rod and the rotating rod can continue to support the deformed foundation pit, so that the situation that a support structure is reselected after the traditional foundation pit deforms is avoided.
2. The invention discloses a following excavation and following protection deep foundation pit support structure, when the foundation pit is deformed by inward shrinkage, the pressure born by a pressure sensor begins to increase, when the pressure born by the pressure sensor is increased to a certain threshold value, the driving motor is started to drive the rotating shaft to rotate, further, the transverse supporting rod, the sliding block, the rotating rod and the triangular plate can move inwards until the pressure value born by the first pressure sensor becomes the initial set value again, the diagonal rods, the transverse supporting rods and the rotating rods can continue to support the deformed foundation pit, so that the deformation and bending caused by overlarge bearing pressure of the rotating rods and the diagonal rods are avoided, the safety risk of the foundation pit structure or the surrounding environment is avoided, in addition, the pressure sensor timely transmits the pressure change data to the foundation pit support personnel, so that the foundation pit support personnel can conveniently obtain the foundation pit deformation data in time.
3. According to the excavation-following protection-following deep foundation pit support structure disclosed by the invention, the pressure change data of the guard plate to the connecting block and the guard plate to the nut block can be transmitted to the foundation pit support personnel in time through the pressure sensor, so that the foundation pit support personnel can obtain the foundation pit deformation data in time, the foundation pit is supported in a limited manner, and the safety risk of the surrounding environment is avoided.
4. According to the excavation-following protection-following deep foundation pit enclosure structure, the first fixing plate and the connecting plate are respectively fixed by the enclosure plate through the first threaded hole and the second threaded hole, the driving motor is started to drive the rotating shaft to rotate, the transverse supporting rod, the sliding block and the base can slide towards the middle, the foundation pit is relieved from being supported, then the bolt is unscrewed, the connection between the supporting column and the transverse rod is relieved, the enclosure structure can be recovered, the green construction of the enclosure structure is achieved, and the recyclability is high.
5. According to the excavation-following protection-following deep foundation pit enclosure structure disclosed by the invention, the deformation data of the foundation pit is detected through the pressure sensor, the movement of the transverse supporting rod, the sliding block and the base is properly adjusted according to the numerical value change of the pressure sensor, so that the deformed foundation pit can be supported again, the situation that the foundation pit cannot be effectively supported after the foundation pit is deformed so as to cause the safety risk of the surrounding environment is prevented, the enclosure structure can be recovered after the support is finished, the green construction of the enclosure structure is realized, and the recoverability is higher.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is an overall three-dimensional view of the excavation-following and protection-following deep foundation pit support structure of the invention;
FIG. 2 is a three-dimensional connection diagram of a guard plate and a cross rod in the guard-following deep foundation pit support structure according to the invention;
FIG. 3 is a front sectional view of the support structure for the deep foundation pit with excavation;
FIG. 4 is an enlarged view taken at A of FIG. 2 according to the present invention;
FIG. 5 is an enlarged view of the invention at B of FIG. 2;
FIG. 6 is a three-dimensional view of a first building envelope and a second building envelope of the excavation-following and protection-following deep foundation pit building envelope of the invention;
FIG. 7 is a three-dimensional view of a second enclosure in the excavation-following deep foundation pit enclosure of the present invention;
FIG. 8 is a front sectional view of a triangular plate in the excavation-following and protection-following deep foundation pit support structure of the present invention;
fig. 9 is a cross-sectional view taken along line C-C of fig. 8 in accordance with the present invention.
Reference numerals: 1. a foundation pit; 2. a support pillar; 3. a containment plate; 4. a cross bar; 5. a drive motor; 6. a fixed block; 7. a rotating shaft; 8. a first bevel gear; 9. a spur gear; 10. a threaded rod; 11. a second bevel gear; 12. a transverse support bar; 13. a sliding groove; 14. a slider; 15. rotating the rod; 16. a first fixing plate; 17. a first threaded hole; 18. a nut block; 19. a chute; 20. a first spring; 21. a pressure sensor; 22. a base; 23. a diagonal bar; 24. a set square; 25. connecting blocks; 26. a rack; 27. a slide bar; 28. a circular groove; 29. a round block; 30. an empty groove; 31. a hollow tube; 32. a circular through hole; 33. a baffle plate; 34. a first bolt; 35. a connecting plate; 36. a second threaded hole; 37. a protective cover; 38. a rubber block; 39. a rectangular through hole; 40. a circular ring; 41. a second fixing plate; 42. a second bolt; 43. and a limiting block.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Example one
As shown in fig. 1-7, the support structure for the excavation-following and protection-following deep foundation pit comprises two symmetrical support columns 2 fixedly connected to the inner wall of the bottom of the foundation pit 1 through bolts, wherein the inner walls of the sides of the foundation pit 1 far away from each other are respectively provided with a guard plate 3, the tops of the support columns 2 are fixedly connected with a cross rod 4 through bolts, the top of the cross rod 4 is fixedly connected with a driving motor 5 through bolts, the top of the cross rod 4 is fixedly connected with a protection cover 37 through bolts, and the driving motor 5 is positioned in the protection cover 37, can protect for driving motor 5 through protection casing 37, avoid in the work progress driving motor 5 to appear damaging, be longitudinal rotation in the horizontal pole 4 and be connected with pivot 7, the fixed cover of outer wall of pivot 7 is equipped with first bevel gear 8, driving motor 5's output shaft extend to in the horizontal pole 4 and pass through shaft coupling fixed connection with the top of pivot 7, be equipped with two sets of first fender subassemblies that are used for carrying out the enclosure to foundation ditch 1 in the horizontal pole 4.
The top end of the supporting column 2 is provided with a rectangular through hole 39, the inner wall of the bottom of the cross rod 4 is fixedly embedded with a circular ring 40, the bottom end of the rotating shaft 7 rotatably penetrates through the circular ring 40 and is fixedly connected with a straight gear 9, the bottom of the cross rod 4 is provided with two groups of second enclosure components for enclosing the foundation pit 1, the cross rod 4 is internally and slidably connected with a nut block 18 in threaded connection with a threaded rod 10, a plurality of sliding grooves 19 are annularly arranged on one side of the nut block 18 close to the transverse supporting rod 12, a pressure sensor 21 in contact with the transverse supporting rod 12 is slidably connected in the sliding groove 19, one end of the pressure sensor 21 far away from the transverse supporting rod 12 is fixedly connected with a first spring 20, the other end of the first spring 20 is fixedly connected with the inner wall of one side of the sliding groove 19 far away from the transverse supporting rod 12, one side of the transverse supporting rod 12 close to the nut block 18 is provided with a plurality of circular grooves 28, one side of the nut block 18 close to the transverse supporting rod 12 is provided with a plurality of sliding rods 27, and the other end of the slide bar 27 slides and extends into the circular groove 28 and is fixedly connected with a circular block 29 through a bolt, the top inner wall and the bottom inner wall of the circular groove 28 are both fixedly connected with a limiting block 43 through a bolt, one side of the nut block 18 close to the transverse supporting rod 12 is fixedly connected with a plurality of rubber blocks 38, and the rubber blocks 38 are in contact with the transverse supporting rod 12, when the nut block 18 pushes the transverse supporting rod 12 to slide towards the outside, the rubber blocks 38 can play a role of buffering, the pressure change data of the apron plate 3 to the connecting block 25 and the apron plate 3 to the nut block 18 can be timely transmitted to an enclosure personnel of the foundation pit 1 through the pressure sensor 21, the enclosure personnel of the foundation pit 1 can conveniently obtain the deformation data of the foundation pit 1 in time, the limited support is carried out on the foundation pit 1, and the occurrence of the safety risk of the surrounding environment is avoided.
In the invention, the first enclosure component comprises a fixed block 6 fixedly connected in a cross rod 4 through a bolt, a threaded rod 10 is rotatably penetrated in the fixed block 6, one end of the threaded rod 10 close to a rotating shaft 7 is fixedly connected with a second bevel gear 11, and the second bevel gear 11 is engaged with the first bevel gear 8, the transverse support rod 12 is connected in the transverse rod 4 in a sliding way, a plurality of sliding grooves 13 are annularly arranged on the outer wall of the transverse rod 4, a sliding block 14 is connected in the sliding grooves 13 in a sliding way, and the top of slider 14 rotates and is connected with dwang 15, and the dwang 15 is kept away from the one end of slider 14 and is rotated and be connected with the first fixed plate 16 that collides with fender panel 3, and the equidistance is equipped with a plurality of first screw holes 17 in the first fixed plate 16, and the one end that dwang 15 was kept away from to slider 14 extends to in horizontal pole 4 and with horizontal bracing piece 12 fixed connection, and the one end that pivot 7 was kept away from to threaded rod 10 extends to in the horizontal bracing piece 12.
According to the invention, the second enclosure assembly comprises a base 22 which is slidably connected to the bottom of the cross rod 4, an inclined rod 23 is rotatably connected to the base 22, a triangular plate 24 is rotatably connected to the bottom end of the inclined rod 23, the right-angle side of the triangular plate 24 is respectively contacted with one side of the enclosure plate 3 and the inner wall of the bottom of the foundation pit 1, a connecting block 25 is fixedly connected to one side of the base 22 close to the supporting column 2 through a bolt, a rack 26 penetrating through a rectangular through hole 39 is slidably connected to the bottom of the cross rod 4, the rack 26 is meshed with the straight gear 9, and one side of the connecting block 25 far away from the base 22 is fixedly connected with the rack 26.
In the invention, after the foundation pit 1 is deformed in an expanding way, the pressure born by the pressure sensor 21 begins to be reduced, when the pressure born by the pressure sensor 21 is reduced to a certain threshold value, the driving motor 5 is started to drive the rotating shaft 7 to rotate, so that the transverse supporting rod 12, the sliding block 14, the rotating rod 15 and the triangular plate 24 can continuously move outwards until the pressure value born by the pressure sensor 21 becomes an initial set value, and then the inclined rod 23, the transverse supporting rod 12 and the rotating rod 15 can continuously support the deformed foundation pit 1, thereby avoiding reselecting a supporting structure after the conventional foundation pit 1 is deformed.
According to the invention, one end of the transverse support rod 12, which is far away from the cross rod 4, is fixedly connected with the connecting plate 35 through the bolt, one side of the connecting plate 35, which is far away from the transverse support rod 12, is contacted with the enclosure plate 3, a plurality of second threaded holes 36 are equidistantly arranged in the connecting plate 35, the enclosure plate 3 and the connecting plate 35 can be connected through the second threaded holes 36, the stress area of the transverse support rod 12 and the enclosure plate 3 can be increased through the connecting plate 35, and the enclosure plate 3 is prevented from being extruded and deformed by the transverse support rod 12.
According to the invention, the top of the triangular plate 24 is fixedly connected with the second fixing plate 41 through the bolt, the top end of the second fixing plate 41 is fixedly connected with the first fixing plate 16 positioned below the cross rod 4 through the bolt, the second bolt 42 is arranged in the second fixing plate 41, one end, far away from the supporting column 2, of the second bolt 42 is in threaded connection with the enclosure plate 3, the triangular plate 24 is connected with the first fixing plate 16 positioned below the cross rod 4 through the second fixing plate 41, and therefore the enclosure force of the enclosure plate 3 can be increased.
Example two
As a further improvement of the previous embodiment, as shown in fig. 1 to 9, the present embodiment is a deep foundation pit support structure with following excavation and following protection, which includes two symmetrical support pillars 2 fixedly connected to the inner wall of the bottom of a foundation pit 1 by bolts, the inner walls of the sides of the foundation pit 1 away from each other are both provided with a guard plate 3, the tops of the support pillars 2 are fixedly connected with a cross rod 4 by bolts, the top of the cross rod 4 is fixedly connected with a driving motor 5 by bolts, the top of the cross rod 4 is fixedly connected with a protective cover 37 by bolts, and the driving motor 5 is located in the protective cover 37, and can protect the driving motor 5 by the protective cover 37, so as to prevent the driving motor 5 from being damaged in the construction process, the cross rod 4 is longitudinally and rotatably connected with a rotating shaft 7, the outer wall of the rotating shaft 7 is fixedly sleeved with a first bevel gear 8, the output shaft of the driving motor 5 extends into the cross rod 4 and is fixedly connected with the top end of the rotating shaft 7 by a coupling, two groups of first enclosure assemblies for enclosing the foundation pit 1 are arranged in the cross rod 4.
The top end of the supporting column 2 is provided with a rectangular through hole 39, the inner wall of the bottom of the cross rod 4 is fixedly embedded with a circular ring 40, the bottom end of the rotating shaft 7 rotatably penetrates through the circular ring 40 and is fixedly connected with a straight gear 9, the bottom of the cross rod 4 is provided with two groups of second enclosure components for enclosing the foundation pit 1, the cross rod 4 is internally and slidably connected with a nut block 18 in threaded connection with a threaded rod 10, a plurality of sliding grooves 19 are annularly arranged on one side of the nut block 18 close to the transverse supporting rod 12, a pressure sensor 21 in contact with the transverse supporting rod 12 is slidably connected in the sliding groove 19, one end of the pressure sensor 21 far away from the transverse supporting rod 12 is fixedly connected with a first spring 20, the other end of the first spring 20 is fixedly connected with the inner wall of one side of the sliding groove 19 far away from the transverse supporting rod 12, one side of the transverse supporting rod 12 close to the nut block 18 is provided with a plurality of circular grooves 28, one side of the nut block 18 close to the transverse supporting rod 12 is provided with a plurality of sliding rods 27, and the other end of the slide bar 27 slides and extends into the circular groove 28 and is fixedly connected with a circular block 29 through a bolt, the top inner wall and the bottom inner wall of the circular groove 28 are both fixedly connected with a limiting block 43 through a bolt, one side of the nut block 18 close to the transverse supporting rod 12 is fixedly connected with a plurality of rubber blocks 38, and the rubber blocks 38 are in contact with the transverse supporting rod 12, when the nut block 18 pushes the transverse supporting rod 12 to slide towards the outside, the rubber blocks 38 can play a role of buffering, the pressure change data of the apron plate 3 to the connecting block 25 and the apron plate 3 to the nut block 18 can be timely transmitted to an enclosure personnel of the foundation pit 1 through the pressure sensor 21, the enclosure personnel of the foundation pit 1 can conveniently obtain the deformation data of the foundation pit 1 in time, the limited support is carried out on the foundation pit 1, and the occurrence of the safety risk of the surrounding environment is avoided.
In the invention, the first enclosure component comprises a fixed block 6 fixedly connected in a cross rod 4 through a bolt, a threaded rod 10 is rotatably penetrated in the fixed block 6, one end of the threaded rod 10 close to a rotating shaft 7 is fixedly connected with a second bevel gear 11, and the second bevel gear 11 is engaged with the first bevel gear 8, the transverse support rod 12 is connected in the transverse rod 4 in a sliding way, a plurality of sliding grooves 13 are annularly arranged on the outer wall of the transverse rod 4, a sliding block 14 is connected in the sliding grooves 13 in a sliding way, and the top of slider 14 rotates and is connected with dwang 15, and the dwang 15 is kept away from the one end of slider 14 and is rotated and be connected with the first fixed plate 16 that collides with fender panel 3, and the equidistance is equipped with a plurality of first screw holes 17 in the first fixed plate 16, and the one end that dwang 15 was kept away from to slider 14 extends to in horizontal pole 4 and with horizontal bracing piece 12 fixed connection, and the one end that pivot 7 was kept away from to threaded rod 10 extends to in the horizontal bracing piece 12.
According to the invention, the second enclosure assembly comprises a base 22 which is slidably connected to the bottom of the cross rod 4, an inclined rod 23 is rotatably connected to the base 22, a triangular plate 24 is rotatably connected to the bottom end of the inclined rod 23, the right-angle side of the triangular plate 24 is respectively contacted with one side of the enclosure plate 3 and the inner wall of the bottom of the foundation pit 1, a connecting block 25 is fixedly connected to one side of the base 22 close to the supporting column 2 through a bolt, a rack 26 penetrating through a rectangular through hole 39 is slidably connected to the bottom of the cross rod 4, the rack 26 is meshed with the straight gear 9, and one side of the connecting block 25 far away from the base 22 is fixedly connected with the rack 26.
In the invention, after the foundation pit 1 is deformed in an expanding way, the pressure born by the pressure sensor 21 begins to be reduced, when the pressure born by the pressure sensor 21 is reduced to a certain threshold value, the driving motor 5 is started to drive the rotating shaft 7 to rotate, so that the transverse supporting rod 12, the sliding block 14, the rotating rod 15 and the triangular plate 24 can continuously move outwards until the pressure value born by the pressure sensor 21 becomes an initial set value, and then the inclined rod 23, the transverse supporting rod 12 and the rotating rod 15 can continuously support the deformed foundation pit 1, thereby avoiding reselecting a supporting structure after the conventional foundation pit 1 is deformed.
According to the invention, one end of the transverse support rod 12, which is far away from the cross rod 4, is fixedly connected with the connecting plate 35 through the bolt, one side of the connecting plate 35, which is far away from the transverse support rod 12, is contacted with the enclosure plate 3, a plurality of second threaded holes 36 are equidistantly arranged in the connecting plate 35, the enclosure plate 3 and the connecting plate 35 can be connected through the second threaded holes 36, the stress area of the transverse support rod 12 and the enclosure plate 3 can be increased through the connecting plate 35, and the enclosure plate 3 is prevented from being extruded and deformed by the transverse support rod 12.
According to the invention, the top of the triangular plate 24 is fixedly connected with the second fixing plate 41 through the bolt, the top end of the second fixing plate 41 is fixedly connected with the first fixing plate 16 positioned below the cross rod 4 through the bolt, the second bolt 42 is arranged in the second fixing plate 41, one end, far away from the supporting column 2, of the second bolt 42 is in threaded connection with the enclosure plate 3, the triangular plate 24 is connected with the first fixing plate 16 positioned below the cross rod 4 through the second fixing plate 41, and therefore the enclosure force of the enclosure plate 3 can be increased.
In the invention, a hollow groove 30 is arranged in a triangular plate 24, two symmetrical baffle plates 33 are movably matched on the inner wall of one side of the triangular plate 24 far away from an inclined rod 23, two groups of symmetrical first bolts 34 are arranged on one side of the triangular plate 24 near the inclined rod 23, one end of each first bolt 34 far away from the inclined rod 23 is in threaded connection with the baffle plate 33, a hollow pipe 31 in contact with the inner wall of the bottom of a foundation pit 1 penetrates through the triangular plate 24, one side of the hollow pipe 31 far away from the inclined rod 23 is in contact with a surrounding protection plate 3, a plurality of circular through holes 32 in the hollow pipe 30 are arranged in the hollow pipe 31, the hollow pipe 31 is inserted into the triangular plate 24, concrete is poured into the hollow pipe 31 through the top end of the hollow pipe 31, the concrete in the hollow pipe 31 enters the hollow groove 30 through the circular through holes 32, after the concrete is solidified, a certain supporting effect is achieved on the surrounding protection plate 3, when the supporting structure needs to be dismantled, the first bolts 34 are unscrewed, the connection between the triangular plate 24 and the baffle 33 is released, and the baffle 33 is taken out from the empty groove 30 to both sides, so that the triangular plate 24 and the baffle 33 can be collected.
The advantages of the second embodiment over the first embodiment are: be equipped with dead slot 30 in the set-square 24, one side inner wall clearance fit that the down tube 23 was kept away from to the set-square 24 has two symmetrical baffles 33, one side that the set-square 24 is close to the down tube 23 is equipped with a plurality of first bolts 34 of two sets of symmetries, and the one end and the baffle 33 threaded connection of down tube 23 are kept away from to first bolt 34, it has the hollow tube 31 that touches with 1 bottom inner wall of foundation ditch mutually to run through in the set-square 24, and one side that the down tube 23 was kept away from to hollow tube 31 touches with apron plate 3, be equipped with a plurality of circular through-holes 32 that are located the dead slot 30 in the hollow tube 31.
A supporting method of a following excavation and following protection deep foundation pit support structure comprises the following steps:
s1, fixing the cross rod 4 at the top end of the support column 2 through a bolt, starting the driving motor 5 to drive the rotating shaft 7 to rotate, enabling the first bevel gear 8 to be meshed with the second bevel gear 11, enabling the second bevel gear 11 to drive the threaded rod 10 to rotate, enabling the threaded rod 10 to be in threaded connection with the nut block 18, and enabling the nut block 18 to push the transverse support rod 12 and the sliding block 14 to slide outwards until the connecting plate 35 and the first fixing plate 16 are both in contact with the containment plate 3;
s2, the connecting plate 35 is fixedly connected with the containment plate 3 through the first threaded hole 17 and the second threaded hole 36 respectively, the threaded rod 10 continues to rotate, the nut block 18 continues to push the transverse supporting rod 12 and the rotating rod 15 outwards, at the moment, the pressure sensor 21 enters the sliding groove 19 under the reaction force of the transverse supporting rod 12, the first spring 20 is compressed, the threaded rod 10 stops rotating after the pressure applied to the pressure sensor 21 reaches a set value, when the rotating shaft 7 rotates to drive the threaded rod 10 to rotate, the rotating shaft 7 drives the rack 26 to slide outwards through the straight gear 9 due to the fact that the straight gear 9 is meshed with the rack 26, and the rack 26 simultaneously pushes the inclined rod 23 and the triangular plate 24 outwards through the connecting block 25;
s3, when the foundation pit 1 is expanded and deformed, the pressure born by the pressure sensor 21 begins to be reduced, when the pressure born by the pressure sensor 21 is reduced to a certain threshold value, the driving motor 5 is started to drive the rotating shaft 7 to rotate, and further the transverse supporting rod 12, the sliding block 14, the rotating rod 15 and the triangular plate 24 can continuously move outwards until the pressure value born by the pressure sensor 21 becomes an initial set value, and the inclined rod 23, the transverse supporting rod 12 and the rotating rod 15 continuously support the deformed foundation pit 1;
s4, when the foundation pit 1 is inwardly shrunk and deformed, the pressure born by the pressure sensor 21 begins to increase, when the pressure born by the pressure sensor 21 increases to a certain threshold value, the driving motor 5 is started to drive the rotating shaft 7 to rotate, so that the transverse supporting rod 12, the sliding block 14, the rotating rod 15 and the triangular plate 24 can move inwards until the pressure value born by the pressure sensor 21 becomes an initial set value again, the inclined rod 23, the transverse supporting rod 12 and the rotating rod 15 can continue to support the deformed foundation pit 1, deformation and bending caused by overlarge pressure born by the rotating rod 15 and the inclined rod 23 are avoided, the safety risk of the structure of the foundation pit 1 or the surrounding environment is caused, in addition, the pressure sensor 21 timely transmits pressure change data to an enclosure person of the foundation pit 1, and the enclosure person of the foundation pit 1 can conveniently obtain the deformation data of the foundation pit 1 in time;
s5, when pressure values detected by a plurality of pressure sensors 21 in the same nut block 18 are different, the deformation strength of different positions of the inner wall of the foundation pit 1 can be accurately detected through the pressure sensors 21, and accordingly, a later foundation pit 1 enclosure worker can conveniently take corresponding measures;
s6, after the construction of the foundation pit 1 is finished, the first fixing plate 16 and the connecting plate 35 are respectively fixed by the apron boards 3 through the first threaded holes 17 and the second threaded holes 36, the driving motor 5 is started to drive the rotating shaft 7 to rotate, the nut block 18 drives the sliding rod 27 to move towards the middle, the round block 29 is in contact with the limiting block 43, the transverse supporting rod 12 can be driven to move towards the middle, the transverse supporting rod 12, the sliding block 14 and the base 22 can slide towards the middle, the supporting of the foundation pit 1 is released, then the bolts are unscrewed, the connection between the supporting columns 2 and the cross rods 4 is released, and the supporting structure can be recovered.
However, as is well known to those skilled in the art, the working principle and wiring method of the driving motor 5 and the pressure sensor 21 are conventional in the art and will not be described herein, and those skilled in the art can make any choice according to their needs or convenience.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a deep foundation pit retaining structure is protected along with digging, includes two symmetrical support columns (2) of fixed connection at foundation pit (1) bottom inner wall, its characterized in that, one side inner wall that foundation pit (1) kept away from each other all is equipped with apron board (3), the top of support column (2) is through bolt fixedly connected with horizontal pole (4), the top fixedly connected with driving motor (5) of horizontal pole (4), it is connected with pivot (7) to be vertical rotation in horizontal pole (4), the outer wall fixed cover of pivot (7) is equipped with first bevel gear (8), the output shaft of driving motor (5) extends to in horizontal pole (4) and with the top fixed connection of pivot (7), be equipped with two sets of first enclosure subassemblies that are used for enclosing foundation pit (1) in horizontal pole (4), the top of support column (2) is equipped with rectangle through-hole (39), the bottom inner wall of horizontal pole (4) is fixed to be inlayed and is equipped with ring (40), the bottom of pivot (7) is rotated and is run through ring (40) and fixedly connected with spur gear (9), the bottom of horizontal pole (4) is equipped with two sets of second enclosure subassemblies that are used for carrying out the enclosure to foundation ditch (1).
2. The support structure for the deep foundation pit along with excavation according to claim 1, wherein the first support component comprises a fixed block (6) fixedly connected in a cross rod (4), a threaded rod (10) is rotatably penetrated in the fixed block (6), one end of the threaded rod (10) close to a rotating shaft (7) is fixedly connected with a second bevel gear (11), the second bevel gear (11) is meshed with a first bevel gear (8), a transverse supporting rod (12) is slidably connected in the cross rod (4), a plurality of sliding grooves (13) are annularly arranged on the outer wall of the cross rod (4), a sliding block (14) is slidably connected in the sliding grooves (13), a rotating rod (15) is rotatably connected at the top end of the sliding block (14), one end of the rotating rod (15) far away from the sliding block (14) is rotatably connected with a first fixed plate (16) which is contacted with the support plate (3), the equidistance is equipped with a plurality of first screw holes (17) in first fixed plate (16), the one end that dwang (15) were kept away from in slider (14) extends to horizontal pole (4) and with horizontal bracing piece (12) fixed connection, and threaded rod (10) keep away from the one end of pivot (7) and extend to in horizontal bracing piece (12).
3. The excavation-following deep foundation pit support structure according to claim 2, wherein the cross rod (4) is slidably connected with a nut block (18) in threaded connection with the threaded rod (10), a plurality of sliding grooves (19) are annularly arranged on one side of the nut block (18) close to the transverse supporting rod (12), a pressure sensor (21) in contact with the transverse supporting rod (12) is slidably connected with the sliding grooves (19), one end of the pressure sensor (21) far away from the transverse supporting rod (12) is fixedly connected with a first spring (20), the other end of the first spring (20) is fixedly connected with the inner wall of one side of the sliding grooves (19) far away from the transverse supporting rod (12), a plurality of circular grooves (28) are arranged on one side of the transverse supporting rod (12) close to the nut block (18), a plurality of sliding rods (27) are arranged on one side of the nut block (18) close to the transverse supporting rod (12), and the other end of the sliding rod (27) slides and extends into the circular groove (28) and is fixedly connected with a circular block (29), and the top inner wall and the bottom inner wall of the circular groove (28) are fixedly connected with a limiting block (43).
4. The deep foundation pit support structure along with digging of claim 3, wherein the second support assembly comprises a base (22) slidably connected to the bottom of a cross rod (4), an inclined rod (23) is rotatably connected to the base (22), a triangular plate (24) is rotatably connected to the bottom end of the inclined rod (23), the right-angle side of the triangular plate (24) is in contact with one side of the support plate (3) and the inner wall of the bottom of the foundation pit (1) respectively, a connecting block (25) is fixedly connected to one side of the base (22) close to the supporting column (2), a rack (26) penetrating through a rectangular through hole (39) is slidably connected to the bottom of the cross rod (4), the rack (26) is meshed with a straight gear (9), and one side of the connecting block (25) far away from the base (22) is fixedly connected with the rack (26).
5. A deep foundation pit support structure with excavation as required according to claim 1, wherein a protection cover (37) is fixedly connected to the top of the cross rod (4), and the driving motor (5) is located in the protection cover (37).
6. The excavation-following deep foundation pit support structure according to claim 3, wherein a plurality of rubber blocks (38) are fixedly connected to one side of the nut block (18) close to the transverse supporting rod (12), and the rubber blocks (38) collide with the transverse supporting rod (12).
7. The deep foundation pit support structure with excavation being carried out according to claim 2, wherein one end of the transverse supporting rod (12) far away from the cross rod (4) is fixedly connected with a connecting plate (35), one side of the connecting plate (35) far away from the transverse supporting rod (12) is in contact with the guard plate (3), and a plurality of second threaded holes (36) are arranged in the connecting plate (35) at equal intervals.
8. The excavation-following deep foundation pit support structure according to claim 4, wherein a second fixing plate (41) is fixedly connected to the top of the triangular plate (24), the top end of the second fixing plate (41) is fixedly connected to the first fixing plate (16) located below the cross rod (4), a second bolt (42) is arranged in the second fixing plate (41), and one end, far away from the support column (2), of the second bolt (42) is in threaded connection with the apron plate (3).
9. The support structure for the deep foundation pit along with excavation according to claim 4, wherein a hollow groove (30) is formed in the triangular plate (24), two symmetrical baffle plates (33) are movably matched with the inner wall of one side, away from the diagonal rod (23), of the triangular plate (24), two groups of symmetrical first bolts (34) are arranged on one side, close to the diagonal rod (23), of the triangular plate (24), one end, away from the diagonal rod (23), of each first bolt (34) is in threaded connection with the corresponding baffle plate (33), a hollow pipe (31) which is in contact with the inner wall of the bottom of the foundation pit (1) penetrates through the triangular plate (24), one side, away from the diagonal rod (23), of the hollow pipe (31) is in contact with the guard plate (3), and a plurality of circular through holes (32) which are formed in the hollow groove (30) are formed in the hollow pipe (31).
10. A supporting method of a following excavation and following protection deep foundation pit support structure is characterized by comprising the following steps:
s1, fixing the cross rod (4) at the top end of the supporting column (2) through a bolt, starting a driving motor (5) to drive a rotating shaft (7) to rotate, enabling a first bevel gear (8) and a second bevel gear (11) to be meshed with each other, enabling the second bevel gear (11) to drive a threaded rod (10) to rotate, enabling the threaded rod (10) to be in threaded connection with a nut block (18), and enabling the nut block (18) to push a transverse supporting rod (12) and a sliding block (14) to slide outwards until a connecting plate (35) and a first fixing plate (16) are in contact with the containment plate (3);
s2, the connecting plate (35) is respectively and fixedly connected with the enclosure plate (3) through the first threaded hole (17) and the second threaded hole (36), the threaded rod (10) continues to be rotated, the nut block (18) continues to push the transverse supporting rod (12) and the rotating rod (15) outwards, at the moment, the pressure sensor (21) enters the sliding groove (19) under the reaction force of the transverse supporting rod (12), the first spring (20) is compressed until the pressure on the pressure sensor (21) reaches a set value, the threaded rod (10) stops rotating, when the rotating shaft (7) rotates to drive the threaded rod (10) to rotate, the straight gear (9) is meshed with the rack (26), the rotating shaft (7) drives the rack (26) to slide outwards through the straight gear (9), and the rack (26) simultaneously pushes the inclined rod (23) and the triangular plate (24) outwards through the connecting block (25);
s3, when the foundation pit (1) is expanded and deformed, the pressure born by the pressure sensor (21) begins to be reduced, when the pressure born by the pressure sensor (21) is reduced to a certain threshold value, the driving motor (5) is started to drive the rotating shaft (7) to rotate, and then the transverse supporting rod (12), the sliding block (14), the rotating rod (15) and the triangular plate (24) can continue to move outwards until the pressure value born by the pressure sensor (21) becomes an initial set value, and the inclined rod (23), the transverse supporting rod (12) and the rotating rod (15) can continue to support the deformed foundation pit (1);
s4, when the foundation pit (1) is inwardly shrunk and deformed, the pressure born by the pressure sensor (21) begins to increase, when the pressure born by the pressure sensor (21) increases to a certain threshold value, the driving motor (5) is started to drive the rotating shaft (7) to rotate, so that the transverse supporting rod (12), the sliding block (14), the rotating rod (15) and the triangular plate (24) can move inwards until the pressure value born by the pressure sensor (21) becomes an initial set value again, the inclined rod (23), the transverse supporting rod (12) and the rotating rod (15) can continue to support the deformed foundation pit (1), the deformation and bending caused by overlarge bearing pressure of the rotating rod (15) and the inclined rod (23) are avoided, the safety envelope risk of the structure of the foundation pit (1) or the surrounding environment is caused, and the pressure change data can be timely transmitted to the personnel in the foundation pit (1) by the pressure sensor (21), the enclosure personnel of the foundation pit (1) can obtain deformation data of the foundation pit (1) in time conveniently;
s5, when pressure values detected by a plurality of pressure sensors (21) in the same nut block (18) are different, the deformation strength of different positions of the inner wall of the foundation pit (1) can be accurately detected through the pressure sensors (21), and accordingly, enclosure personnel of the foundation pit (1) can conveniently take corresponding measures in the later period;
s6, after the construction of the foundation pit (1) is finished, the first fixing plate (16) and the connecting plate (35) are respectively fixed by the apron plate (3) through the first threaded hole (17) and the second threaded hole (36), the driving motor (5) is started to drive the rotating shaft (7) to rotate, the nut block (18) drives the sliding rod (27) to move towards the middle, the round block (29) is in contact with the limiting block (43) to drive the transverse supporting rod (12) to move towards the middle, the transverse supporting rod (12), the sliding block (14) and the base (22) slide towards the middle, the supporting of the foundation pit (1) is released, the bolt is unscrewed, the connection between the supporting column (2) and the cross rod (4) is released, and the supporting structure is recovered.
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| CN202111578202.0A CN114197484A (en) | 2021-12-22 | 2021-12-22 | Excavation-following and protection-following deep foundation pit support structure and support method thereof |
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