CN219604368U - Deep foundation pit supporting structure capable of preventing deformation - Google Patents

Abstract

The utility model relates to a deep foundation pit supporting structure capable of preventing deformation, which comprises a plurality of supporting frames, wherein the supporting frames are arranged in parallel, two ends of each supporting frame are respectively provided with a supporting part, each supporting part comprises a supporting plate and at least three supporting rods, each supporting plate is arranged at the end part of each supporting frame, each supporting rod is detachably connected with each supporting frame and each supporting plate, at least three supporting rods are arranged around each supporting frame, and at least three supporting rods are obliquely arranged towards each supporting frame. The utility model has the effect of reducing the interference of the supporting structure to the construction in the foundation pit while controlling the deformation of the deep foundation pit.

Description

Deep foundation pit supporting structure capable of preventing deformation

Technical Field

The utility model relates to the technical field of deep foundation pit supporting, in particular to a deep foundation pit supporting structure capable of preventing deformation.

Background

The vast majority of subway deep foundation pit construction is located in dense urban centers, various built structures, pipelines, roads and underground tunnels are densely distributed around the foundation pit, and the surrounding environment is complex. In the excavation engineering of the subway deep foundation pit, the balance of the original soil body can be caused along with the unloading of the soil body, the foundation pit can be subjected to the soil pressure in all aspects after the balance of the soil body is broken, the side slope of the deep foundation pit can be deformed, and certain hidden danger can be generated in the foundation pit and the safety around the foundation pit if the deformation is not prevented and controlled, so that the deformation of the subway foundation pit must be strictly controlled, and the safety of the surrounding environment is ensured.

At present, the deep foundation pit is usually supported through an inner supporting type supporting structure, the inner supporting type supporting structure comprises a plurality of supporting steel frames, the supporting steel frames are arranged in parallel, supporting seats are fixedly connected to two ends of each supporting steel frame respectively, and the supporting seats at two ends of each supporting steel frame are respectively abutted to two opposite side walls of the deep foundation pit so as to support the side slope of the deep foundation pit, and therefore deformation of the subway foundation pit is controlled.

In order to stably support the side slope of the deep foundation pit, a large number of support steel frames are arranged. However, more supporting steel frames occupy more space in the deep foundation pit, and interfere with the continuous deep excavation after the deep foundation pit, the bottom plate manufacture and other constructions, so that the construction efficiency is reduced.

Disclosure of Invention

In order to control deformation of a deep foundation pit and reduce interference of a supporting structure to construction in the foundation pit, the utility model provides a deep foundation pit supporting structure capable of preventing deformation.

The utility model provides a deep foundation pit supporting structure capable of preventing deformation, which adopts the following technical scheme:

the utility model provides a prevent deep basal pit supporting construction of deformation, includes a plurality of support frames, a plurality of support frames mutual parallel arrangement, the both ends of support frame are provided with the butt piece respectively, the butt piece includes butt board and at least three butt pole, the butt board sets up in the tip of support frame, the butt pole can be dismantled simultaneously and connect in support frame and butt board, at least three the butt pole encircles the support frame setting, at least three the butt pole all inclines towards the support frame setting.

Through adopting above-mentioned technical scheme, carry out the bracing through at least three butt pole to the support frame to strengthen the connection of support frame and butt board, reduce the torque that the support frame receives when butt board and foundation ditch soil body carry out the butt and support, make a support frame support the foundation ditch soil body of bigger area, make the support frame number in the foundation ditch can reduce, bearing structure occupies less to the space in the foundation ditch, make the construction space grow in the deep basal ditch, with the interference that reduces bearing structure to construction in the deep basal ditch, with promotion efficiency of construction.

Optionally, the support frame includes the intermediate lever and sets up in a plurality of connecting rods at intermediate lever both ends, the cross-sectional profile of intermediate lever is the round platform form that two symmetries set up, just two tip looks of intermediate lever keep away from the setting, and is a plurality of the cross-sectional profile of connecting rod all is the round platform form, the diameter of the connecting rod cross-sectional circle of one side of intermediate lever reduces in proper order, and cross-sectional circle diameter is biggest the connecting rod can be dismantled and be connected in the intermediate lever, a plurality of can dismantle between the connecting rod and be connected.

Through adopting above-mentioned technical scheme, the diameter of the middle part of middle pole is biggest, and the diameter of the both ends of middle pole and connecting rod diminishes gradually for the support frame receives the biggest middle part of moment's bending resistance reinforcing, makes the support frame support to the foundation ditch soil body more steadily.

Optionally, the both ends fixedly connected with solid fixed ring of intermediate lever, a plurality of the both ends fixedly connected with solid fixed ring of connecting rod also, intermediate lever and the solid fixed ring bolted connection of connecting rod, adjacent two gu fixed ring bolted connection of connecting rod.

Through adopting above-mentioned technical scheme, through passing through bolted connection with intermediate lever and connecting rod, the solid fixed ring of two connecting rods for intermediate lever and a plurality of connecting rods can be connected steadily, can support the foundation ditch soil body simultaneously steadily.

Optionally, hydraulic cylinders are respectively arranged at two ends of the support frame, and the abutting plates are vertically arranged at telescopic ends of the hydraulic cylinders; the supporting rod comprises a large rod and a small rod, the large rod is rotationally connected and detachably connected to the supporting plate, the small rod is rotationally connected and detachably connected to the supporting frame, the large rod is sleeved with and glidingly connected to the small rod, a locking piece is arranged between the large rod and the small rod, and the locking piece is used for locking the sliding of the large rod and the small rod.

Through adopting above-mentioned technical scheme, the flexible interval that makes the support frame can adapt to the relative both sides wall of deep basal pit through the flexible end of pneumatic cylinder for the butt joint board can support tightly in the basal pit soil body, in order to support the basal pit soil body steadily. Simultaneously, big pole and little pole are through sliding in order to adapt to the interval of support frame to butt board, and rethread locking piece locks the slip of big pole and little pole for big pole and little pole can strengthen the connection of support frame and butt board.

Optionally, the locking piece includes big cover, little cover and connects in big cover and little cover's transition cover simultaneously, big cover overcoat and threaded connection are in big pole, little cover overcoat and threaded connection are in little pole.

Through adopting above-mentioned technical scheme, with the direction swivelling movement of little cover orientation keep away from the big pole, the big pole can slide relative little pole to adapt to the interval change of butt board and support frame. After the sliding is completed, the small sleeve is rotated and moved towards the direction close to the large rod, and meanwhile, the large sleeve can be sleeved outside and connected with the large rod in a threaded mode, so that the large rod is locked against the sliding of the small rod.

Optionally, a plurality of the holding tank has all been seted up to the both ends terminal surface of support frame, the pneumatic cylinder is located the holding tank, just the pneumatic cylinder can dismantle and connect in the support frame.

Through adopting above-mentioned technical scheme, the pneumatic cylinder is located the holding tank for the pneumatic cylinder is more stable with being connected of support frame, in order to reduce the relative bracing piece of pneumatic cylinder and take place to rotate the possibility, in order to make the pneumatic cylinder can make the butt board support tightly in foundation ditch soil body more steadily.

Optionally, the cell wall of holding tank inserts establishes and threaded connection has fixing bolt, fixing bolt butt in the pneumatic cylinder.

Through adopting above-mentioned technical scheme, screw up fixing bolt through relative support frame for fixing bolt supports tightly in the pneumatic cylinder, so that the pneumatic cylinder is located the holding tank steadily.

Optionally, the butt board is waterproof material and makes, butt board fixedly connected with keeps somewhere the pole, keep somewhere the pole and can dismantle the flexible end of connecting in the pneumatic cylinder.

Through adopting above-mentioned technical scheme, because excavation and bottom plate preparation are accomplished the back in to the foundation ditch, need pour the retaining wall and fix the foundation ditch soil body, the butt board can be regarded as the waterproof board, hinders groundwater to ooze to retaining wall department, reduces the degree that groundwater erodees the concrete of retaining wall to reduce the possibility that the retaining wall takes place to split. When the steel reinforcement framework is erected, the retaining rod is arranged between the steel frame frameworks in a penetrating mode, and the supporting frame and the hydraulic cylinder still support the abutting plate. After concrete is poured and cured, the hydraulic cylinder and the supporting frame are detached relative to the retaining rod, and the retaining rod is embedded in the retaining wall, so that the abutting plate can be abutted against the foundation pit soil body all the time.

Optionally, the adjacent both sides border of butt board has seted up the grafting groove, same butt board adjacent both sides border fixedly connected with plugboard, the plugboard of butt board is inserted and is located in the grafting groove of adjacent butt board.

Through adopting above-mentioned technical scheme, the pinboard is inserted and is located the spliced groove, has increased the infiltration route that groundwater oozes to the retaining wall through the clearance between two butt boards to further reduce the groundwater and erode the possibility of retaining wall.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. the support frames are subjected to inclined bracing through the at least three supporting rods so as to strengthen the connection between the support frames and the supporting plates, so that one support frame can support foundation pit soil with larger area, the number of the support frames in the foundation pit can be reduced, the space occupation of the support structure in the foundation pit is smaller, the interference of the support structure on construction in the deep foundation pit is reduced, and the construction efficiency is improved;

2. the diameter of the middle part of the middle rod is maximum, and the diameters of the two ends of the middle rod and the connecting rod are gradually reduced, so that the bending resistance of the middle part with the maximum torque of the support frame is enhanced, and the support frame can more stably support the foundation pit soil body;

3. the support frame can adapt to the distance between two opposite side walls of the deep foundation pit through the extension and contraction of the extension and contraction ends of the hydraulic cylinder, so that the abutting plate can abut against a foundation pit soil body to stably support the foundation pit soil body.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

Fig. 2 is a schematic structural view of an abutment according to an embodiment of the utility model.

Reference numerals: 1. a support frame; 11. an intermediate lever; 12. a connecting rod; 13. a fixing ring; 2. an abutment; 21. an abutting plate; 211. a plug-in groove; 212. a plug board; 22. a butt joint rod; 221. a large rod; 222. a small rod; 3. a hydraulic cylinder; 4. a locking member; 41. a large sleeve; 42. a small sleeve; 43. a transition sleeve; 5. a receiving groove; 51. a fixing bolt; 6. a retention rod; 7. a fixing seat; 8. a connecting disc; 9. foundation pit soil.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-2.

The embodiment of the utility model discloses a deep foundation pit supporting structure capable of preventing deformation. Referring to fig. 1, the deformation preventing deep foundation pit supporting structure includes a plurality of supporting frames 1, and the plurality of supporting frames 1 are disposed parallel to each other. The support frame 1 includes middle pole 11 and sets up in a plurality of connecting rods 12 at middle pole 11 both ends, and the cross-sectional profile of middle pole 11 is the round platform form that two symmetries set up, and the setting is kept away from mutually to two tip of middle pole 11. The cross-sectional profiles of the plurality of connecting rods 12 are all in a truncated cone shape, and the diameters of the cross-sectional circles of the connecting rods 12 at the two sides of the middle rod 11 are sequentially reduced. The intermediate lever 11 and the plurality of connecting levers 12 are each disposed with the central axis.

Referring to fig. 1 and 2, fixing rings 13 are fixedly connected to both ends of the intermediate rod 11, and the fixing rings 13 and the intermediate rod 11 are arranged with the same central axis; the two ends of the connecting rods 12 are fixedly connected with fixing rings 13, and the fixing rings 13 and the connecting rods 12 are arranged with the same central axis. The connecting rods 12 with the largest cross-sectional diameters are connected with the fixing rings 13 of the middle rod 11 through bolts, and the fixing rings 13 of two adjacent connecting rods 12 are connected with each other through bolts. Through passing through bolted connection with intermediate lever 11 and connecting rod 12, the solid fixed ring 13 of two connecting rods 12 for intermediate lever 11 and a plurality of connecting rods 12 can stably connect, can stably support foundation ditch soil body 9 simultaneously.

Referring to fig. 1 and 2, two connecting rods 12 that are far away from each other are respectively provided with an abutting piece 2, the abutting piece 2 includes an abutting plate 21 and three abutting rods 22, and the abutting plate 21 is provided to the connecting rods 12. One end of the abutting rod 22 is connected to the abutting plate 21 through bolts, and the other end of the abutting rod 22 is connected to the fixing ring 13 of the connecting rod 12 through bolts. Three abutting rods 22 are arranged around the connecting rod 12, and all three abutting rods 22 are obliquely arranged towards the connecting rod 12.

The connecting rod 12 is subjected to diagonal bracing through the three supporting rods 22 so as to strengthen the connection between the connecting rod 12 and the supporting plate 21, the torque born by the supporting frame 1 when the supporting plate 21 and the foundation pit soil body 9 are in supporting connection is reduced, one supporting frame 1 can support the foundation pit soil body 9 with a larger area, the number of the supporting frames 1 in the foundation pit can be reduced, the space occupied by the supporting structure in the foundation pit is smaller, the construction space in the deep foundation pit is enlarged, the interference of the supporting structure on construction in the deep foundation pit is reduced, and the construction efficiency is improved.

The diameter of the middle part of the middle rod 11 is maximum, and the diameters of the two ends of the middle rod 11 and the connecting rod 12 are gradually reduced, so that the bending resistance of the middle part with the maximum torque of the support frame 1 is enhanced, and the support frame 1 can more stably support the foundation pit soil body 9.

Referring to fig. 1 and 2, due to different excavation calibers of different deep foundation pits, the distances between two opposite side walls of the deep foundation pit are also different, and the support frame 1 is difficult to completely adapt to the distances between two opposite side walls of the deep foundation pit by assembling the connecting rods 12, so that the support frame 1 can adapt to the deep foundation pits with different excavation calibers, the end faces of two connecting rods 12 which are far away from each other are respectively provided with a containing groove 5, and the hydraulic cylinders 3 are all placed in the two containing grooves 5. The telescopic directions of the telescopic ends of the two hydraulic cylinders 3 are all located on the central axis of the connecting rod 12, and the telescopic directions of the telescopic ends of the two hydraulic cylinders 3 are far away from each other. The abutment plate 21 is perpendicular to the telescopic end of the hydraulic cylinder 3, and the abutment plate 21 is connected to the telescopic end of the hydraulic cylinder 3.

Referring to fig. 2, two fixing bolts 51 are inserted into and screwed to the groove wall of the accommodation groove 5, the insertion directions of the two fixing bolts 51 are set opposite to each other, and both the fixing bolts 51 are abutted against the hydraulic cylinder 3. The pneumatic cylinder 3 is located the holding tank 5 for the pneumatic cylinder 3 is more stable with the connection of support frame 1, makes the pneumatic cylinder 3 can make the butt plate 21 can support in foundation ditch soil body 9 more stably. And by screwing the fixing bolt 51 so that the fixing bolt 51 abuts against the hydraulic cylinder 3, the hydraulic cylinder 3 can be stably positioned in the accommodation groove 5.

Referring to fig. 1 and 2, in order to accommodate the change of the distance between the connecting rod 12 and the abutting plate 21, the abutting plate 21 and the fixing ring 13 of the connecting rod 12 with the smallest cross-sectional circle diameter are both connected with the fixing seat 7 by bolts. The abutting rod 22 comprises a large rod 221 and a small rod 222, the large rod 221 is sleeved and slidingly connected with the small rod 222, the large rod 221 is rotatably connected with the fixed seat 7 of the abutting plate 21, and the small rod 222 is rotatably connected with the fixed seat 7 of the connecting rod 12.

Referring to fig. 1 and 2, a locking member 4 is provided between a large rod 221 and a small rod 222, the locking member 4 includes a large sleeve 41, a small sleeve 42 and a transition sleeve 43, the large sleeve 41 and the small sleeve 42 are cylindrical, and the diameter of the large sleeve 41 is larger than that of the small sleeve 42. The cross-sectional profile of the transition sleeve 43 is in the shape of a truncated cone, and the transition sleeve 43 is connected to both the large sleeve 41 and the small sleeve 42. The large sleeve 41 is externally sleeved and screwed on the large rod 221, and the small sleeve 42 is externally sleeved and screwed on the small rod 222.

The support frame 1 can adapt to the distance between two opposite side walls of the deep foundation pit through the extension and contraction of the extension and contraction ends of the hydraulic cylinder 3, so that the abutting plate 21 can abut against the foundation pit soil body 9 to stably support the foundation pit soil body 9. Meanwhile, the small sleeve 42 is rotationally moved in a direction away from the large rod 221, and the large rod 221 can slide relative to the small rod 222 so as to adapt to the change of the distance between the abutting plate 21 and the support frame 1. After the sliding is completed, the small sleeve 42 is rotationally moved towards the direction close to the large rod 221, and meanwhile the large sleeve 41 can be sleeved on the large rod 221 in a threaded connection mode, so that sliding of the large rod 221 relative to the small rod 222 is locked, and connection between the large rod 221 and the small rod 222 can be reinforced through the supporting frame 1 and the abutting plate 21.

Referring to fig. 1 and 2, after the excavation in the foundation pit and the fabrication of the bottom plate are completed, a retaining wall needs to be poured to fix the soil body 9 of the foundation pit. The abutting plate 21 is made of waterproof materials, the abutting plate 21 is fixedly connected with the retaining rod 6, the retaining rod 6 is perpendicular to the abutting plate 21, and the retaining rod 6 and the telescopic end of the hydraulic cylinder 3 are arranged with the central axis. The retaining rod 6 is fixedly connected with a connecting disc 8, the telescopic end of the hydraulic cylinder 3 is also fixedly connected with the connecting disc 8, and the two connecting discs 8 are connected with each other through bolts.

The abutting plate 21 can serve as a waterproof plate to prevent groundwater from seeping into the retaining wall, and reduce the erosion degree of the concrete of the retaining wall by the groundwater so as to reduce the possibility of cracking of the retaining wall. When the steel reinforcement framework is erected, the retaining rod 6 is arranged between the steel frame frameworks in a penetrating mode, and the supporting frame 1 and the hydraulic cylinder 3 still abut against the abutting plate 21. After concrete is poured and cured, the hydraulic cylinder 3 and the support frame 1 are detached relative to the retaining rod 6, and the retaining rod 6 is embedded in the retaining wall, so that the abutting plate 21 can be abutted against the foundation pit soil body 9 all the time in the process of removing the support frame 1.

Referring to fig. 1 and 2, insertion grooves 211 are formed in edges of two adjacent sides of the abutting plate 21, insertion plates 212 are fixedly connected to edges of two adjacent sides of the same abutting plate 21, the insertion plates 212 of the abutting plate 21 are inserted into the insertion grooves 211 of the adjacent abutting plates 21, and the infiltration path of groundwater to the retaining wall through a gap between the two abutting plates 21 is increased, so that the possibility that the groundwater erodes the retaining wall is further reduced.

The implementation principle of the deep foundation pit supporting structure for preventing deformation provided by the embodiment of the utility model is as follows: the connecting rod 12 is subjected to diagonal bracing through the three supporting rods 22 so as to strengthen the connection of the connecting rod 12 and the supporting plate 21, the torque born by the supporting frame 1 when the supporting plate 21 and the foundation pit soil body 9 are in supporting connection is reduced, one supporting frame 1 can support the foundation pit soil body 9 slope with a larger area, the number of the supporting frames 1 in the foundation pit can be reduced, the space occupied by the supporting structure in the foundation pit is smaller, the construction space in the deep foundation pit is enlarged, the interference of the supporting structure on the construction in the deep foundation pit is reduced, and the construction efficiency is improved.

The support frame 1 can adapt to the distance between the two opposite side walls of the deep foundation pit through the expansion and contraction of the expansion and contraction ends of the hydraulic cylinder 3, and meanwhile, the large rod 221 can slide relative to the small rod 222 so as to adapt to the distance change between the abutting plate 21 and the support frame 1. After the sliding is completed, the small sleeve 42 is rotationally moved towards the direction close to the large rod 221, so that the large sleeve 41 can be sleeved on the large rod 221 in a threaded connection mode, the sliding of the large rod 221 relative to the small rod 222 is locked, the large rod 221 and the small rod 222 adapt to the change of the distance between the connecting rod 12 and the abutting plate 21, and meanwhile the connection between the supporting frame 1 and the abutting plate 21 can be reinforced.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (9)

1. A prevent deep basal pit supporting construction of deformation, its characterized in that: including a plurality of support frames (1), a plurality of support frames (1) each other parallel arrangement, the both ends of support frame (1) are provided with butt spare (2) respectively, butt spare (2) are including butt board (21) and at least three butt pole (22), butt board (21) set up in the tip of support frame (1), butt pole (22) can dismantle simultaneously and connect in support frame (1) and butt board (21), at least three butt pole (22) encircle support frame (1) setting, at least three butt pole (22) all set up towards support frame (1) slope.

2. The deformation-preventing deep foundation pit supporting structure according to claim 1, wherein: the support frame (1) includes intermediate lever (11) and sets up in a plurality of connecting rods (12) at intermediate lever (11) both ends, the cross section profile of intermediate lever (11) is the round platform form that two symmetries set up, just two tip looks of intermediate lever (11) keep away from the setting, and is a plurality of the cross section profile of connecting rod (12) all is the round platform form, the diameter of connecting rod (12) cross section circle of one side of intermediate lever (11) reduces in proper order, and cross section circle diameter is biggest connecting rod (12) can dismantle and connect in intermediate lever (11), a plurality of can dismantle between connecting rod (12).

3. The deformation-preventing deep foundation pit supporting structure of claim 2, wherein: the two ends of the middle rod (11) are fixedly connected with fixing rings (13), the two ends of the connecting rods (12) are fixedly connected with fixing rings (13), the middle rod (11) is connected with the fixing rings (13) of the connecting rods (12) through bolts, and the fixing rings (13) of two adjacent connecting rods (12) are connected through bolts.

4. The deformation-preventing deep foundation pit supporting structure according to claim 1, wherein: the two ends of the supporting frame (1) are respectively provided with a hydraulic cylinder (3), and the abutting plates (21) are vertically arranged at the telescopic ends of the hydraulic cylinders (3); the supporting rod (22) comprises a large rod (221) and a small rod (222), the large rod (221) is rotationally connected and detachably connected to the supporting plate (21), the small rod (222) is rotationally connected and detachably connected to the supporting frame (1), the large rod (221) is sleeved and slidingly connected to the small rod (222), a locking piece (4) is arranged between the large rod (221) and the small rod (222), and the locking piece (4) is used for locking the sliding of the large rod (221) and the small rod (222).

5. The deformation-preventing deep foundation pit supporting structure of claim 4, wherein: the locking piece (4) comprises a large sleeve (41), a small sleeve (42) and a transition sleeve (43) connected with the large sleeve (41) and the small sleeve (42) simultaneously, wherein the large sleeve (41) is sleeved outside and connected with the large rod (221) in a threaded manner, and the small sleeve (42) is sleeved outside and connected with the small rod (222) in a threaded manner.

6. The deformation-preventing deep foundation pit supporting structure of claim 4, wherein: the two end faces of the supporting frames (1) are provided with accommodating grooves (5), the hydraulic cylinders (3) are located in the accommodating grooves (5), and the hydraulic cylinders (3) are detachably connected to the supporting frames (1).

7. The deformation-preventing deep foundation pit supporting structure of claim 6, wherein: the groove wall of the accommodating groove (5) is inserted and connected with a fixing bolt (51) in a threaded mode, and the fixing bolt (51) is abutted to the hydraulic cylinder (3).

8. The deformation-preventing deep foundation pit supporting structure of claim 4, wherein: the abutting plate (21) is made of waterproof materials, the abutting plate (21) is fixedly connected with an indwelling rod (6), and the indwelling rod (6) is detachably connected to the telescopic end of the hydraulic cylinder (3).

9. The deformation-preventing deep foundation pit supporting structure of claim 8, wherein: the plug-in grooves (211) are formed in the edges of two adjacent sides of the abutting plate (21), the plug-in plates (212) are fixedly connected with the edges of two adjacent sides of the abutting plate (21), and the plug-in plates (212) of the abutting plate (21) are inserted into the plug-in grooves (211) of the adjacent abutting plates (21).