CN113279413A

CN113279413A - Deep foundation pit supporting system

Info

Publication number: CN113279413A
Application number: CN202110713472.1A
Authority: CN
Inventors: 任君; 齐俊发; 孙国松; 朱利平; 任伟龙
Original assignee: Hangzhou Junhui Construction Co ltd
Current assignee: Hangzhou Junhui Construction Co ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2021-08-20

Abstract

The invention discloses a deep foundation pit supporting system which comprises a plurality of supporting walls surrounding the periphery of a deep foundation pit and a plurality of supporting units, wherein each supporting unit comprises a supporting component and a fixing component, a plurality of jacks are formed in each supporting wall, each group of supporting components comprises two abutting pipes with one ends respectively inserted into the jacks on different supporting walls and a connecting cylinder for communicating the two abutting pipes, an external thread is formed on the outer side surface of one abutting pipe close to one end of the connecting piece, one end of each connecting cylinder is screwed with the external thread on the corresponding abutting pipe, the other end of each connecting cylinder is turned inwards to form a flange, the flange abuts against the pipe orifice of the other abutting pipe, each fixing component comprises a fixing ball which is respectively sleeved and fixed on the outer side of the end, far away from each other, of the corresponding abutting pipes, the ball diameter of the fixing balls is larger than the aperture of the jacks, and the outer side surface of each fixing ball abuts against the aperture of the jacks. The invention has the advantages of repeated use, convenient installation and disassembly.

Description

Deep foundation pit supporting system

Technical Field

The invention relates to the technical field of constructional engineering, in particular to a deep foundation pit supporting system.

Background

The deep foundation pit refers to a project with excavation depth of more than or equal to 5 meters, or with excavation depth of less than 5 meters, but with particularly complicated geological conditions, surrounding environment and underground pipelines. In field construction, in order to ensure the safety of the underground structure construction and the surrounding environment of the deep foundation pit, a support, reinforcement and protection measure is usually taken for the side wall of the deep foundation pit and the surrounding environment.

Through retrieval, the Chinese patent No. CN105089061B discloses an ultra-deep foundation pit supporting method: comprises a single-row triaxial deep-mixing pile waterproof curtain, the single-row three-axis deep-stirring pile water-stopping curtain is arranged along the periphery of a foundation pit and is lower than the natural ground, a plurality of the cast-in-situ piles are arranged in the foundation pit on the inner side of the single-row three-axis deep-stirring pile water-stopping curtain at intervals in sequence, a plurality of the steel stand columns are arranged in the foundation pit on the inner side of the cast-in-situ piles, the tops of the cast-in-situ piles are sequentially connected through reinforced concrete crown beams in a pulling mode, reinforced concrete purlins are arranged on the inner sides of the height positions of non-underground floor slabs of the plurality of the cast-in-situ piles along the periphery of the foundation pit, the inner periphery of each reinforced concrete purlin is connected through a plurality of reinforced concrete purlin beams supported on the steel stand columns in a pulling mode, the reinforced concrete purlin beams and the reinforced concrete purlin are connected in a latticed mode through a plurality of reinforced concrete inner supports, filling plain concrete is arranged inwards at the bottoms of the cast-in-situ piles, a bottom plate is laid on the foundation pit filled with the plain concrete inner periphery, and more than one post-casting belt with support is arranged on the bottom plate. The three-axis deep stirring pile waterproof curtain, the bored pile, the steel stand column, the reinforced concrete crown beam, the reinforced concrete purlin and the reinforced concrete purlin beam are arranged on the inner side of the ultra-deep foundation pit, so that the side wall of the foundation pit is supported.

With respect to the related art among the above, the inventors consider that the following drawbacks exist:

the three-axis deep-stirring pile waterproof curtain, the cast-in-situ bored pile, the steel stand column, the reinforced concrete crown beam, the reinforced concrete purlin and the reinforced concrete purlin beam are all steel structures or formed by concrete pouring, and although the three-axis deep-stirring pile waterproof curtain has good supporting strength, the three-axis deep-stirring pile waterproof curtain is difficult to disassemble, cannot be reused after being disassembled, and is high in supporting cost.

Disclosure of Invention

In order to realize the recycling of the deep foundation pit supporting system, the invention provides the deep foundation pit supporting system.

The invention provides a deep foundation pit supporting system, which adopts the following technical scheme: the support unit comprises a support component and a fixing component for fixing the support component and the support wall, each support wall is provided with a plurality of jacks, each support component comprises two abutting pipes with one ends respectively inserted into the jacks on different support walls and a connecting cylinder for communicating the two abutting pipes, one abutting pipe is provided with an external thread near the outer side surface of one end of the connecting piece, one end of each connecting cylinder is in threaded connection with the external thread on the corresponding abutting pipe, the other end of each connecting cylinder is internally folded with a flange, the flange abuts against the pipe orifice of the other abutting pipe, one abutting pipe is provided with a driving component for driving the connecting cylinder to rotate, and the fixing component comprises a fixing ball which is respectively sleeved and fixed on the outer side of the end, far away from each other, of the corresponding abutting pipes, the ball diameter of the fixed ball is larger than the aperture of the jack, and the outer side surface of the fixed ball is tightly abutted against the aperture of the jack.

By adopting the technical scheme, a support wall is arranged in a circle in a deep foundation pit, jacks are arranged on the support wall, one ends of the abutting pipes are inserted into the corresponding jacks, the connecting cylinder is driven by the driving component to rotate, so that the two abutting pipes are mutually far away, the two fixing balls are abutted against the orifices of the jacks, the fixing balls exert abutting force on the support wall in the direction close to the side wall of the deep foundation pit, the supporting effect on the side wall of the deep foundation pit is effectively achieved, the abutting pipes, the connecting cylinder and the jacks are mutually communicated, accumulated water on the side wall of the deep foundation pit can be stored in the abutting pipes through the jacks, the accumulated water plays a supporting effect on the inner walls of the abutting pipes, the possibility that the end parts of the abutting pipes and the support wall are excessively abutted and broken is further reduced, after the use is finished, the connecting cylinder is screwed to separate the connecting cylinder from one abutting pipe, the whole support unit can be separated from the support wall, and can be recycled, the construction cost is reduced.

The present application may be further configured in a preferred example to: one end of each abutting pipe inserted into the jack is connected with a drain pipe in a screwed mode, each drain pipe is communicated with the corresponding abutting pipe, a plurality of drain holes are formed in each drain pipe, and each drain pipe is inserted into the side wall of the deep foundation pit.

Through adopting above-mentioned technical scheme, supporting tight pipe and inserting jack one end spiro union drain pipe, the drain pipe inserts in the deep basal pit lateral wall, can effectively collect ponding in more deep basal pit lateral walls, and then reduces the pressure of deep basal pit lateral wall to the knee wall for cooperation bearing structure is more firm between knee wall and the support element.

The present application may be further configured in a preferred example to: a plurality of supporting units are arranged on the two opposite supporting walls and the two adjacent supporting walls, and the supporting units are spaced from each other.

Through adopting above-mentioned technical scheme, set up the support element between two adjacent knee walls, effectively play the supporting role to adjacent knee wall junction, because deep basal pit size is great, every knee wall middle part is comparatively weak, therefore set up the support element between two relative knee walls, can effectively support the knee wall middle part, effectively strengthen the holding power of knee wall.

The present application may be further configured in a preferred example to: every all seted up two limbers on the connecting cylinder, every limbers department all is provided with the control assembly who is used for the switching limbers, from top to bottom all be provided with the auxiliary pipe on two limbers that are close to each other, the below the auxiliary pipe one end is provided with the subassembly of drawing water, the subassembly of drawing water include with the main pipe of auxiliary pipe intercommunication and with the suction pump of being responsible for one end intercommunication.

Through adopting above-mentioned technical scheme, when using the supporting unit to support the knee wall, adopt control assembly to seal the limbers, when needs dismantle the supporting unit and circulate the use, open the control, ponding assembles to the person in charge along the auxiliary pipe in, adopts the suction pump to take ponding out, reduces and supports tight intraduct water pressure, the more convenient to detach supporting unit.

The present application may be further configured in a preferred example to: the water through hole is provided with a circle of fixed ring plate, the diameter of the auxiliary pipe is smaller than the size of the fixed ring plate, and the auxiliary pipe is sleeved on the corresponding fixed ring plate.

Through adopting above-mentioned technical scheme, when fixed auxiliary pipe and fixed ring board, the auxiliary pipe is the hose, has elasticity, and the auxiliary pipe diameter is less than fixed ring board size, can be with the auxiliary pipe box-packed on fixed ring board, convenient dismantlement and installation, the site operation personnel of being convenient for use improves dismantlement and installation effectiveness.

The present application may be further configured in a preferred example to: the driving assembly comprises a driving motor and a power gear, the driving motor is arranged on a abutting pipe connected with a connecting cylinder in a threaded mode, the power gear is connected with an output shaft of the driving motor, driven gears are sleeved on the outer side face of the connecting cylinder and meshed with the power gear, and the power gear extends along the length direction of the connecting cylinder.

Through adopting above-mentioned technical scheme, when the fixed stay unit, drive driving motor for driving motor drives power gear and rotates, and power gear drives the driven gear with its meshing and drives, and then makes driven gear drive connecting cylinder rotate, and driven gear and power gear keep relative slip, adopt driving motor drive connecting cylinder to rotate, use manpower sparingly, improve job site efficiency of construction.

The present application may be further configured in a preferred example to: the driving assembly further comprises a connecting frame for connecting the driving motor and the abutting pipe, the connecting frame comprises a fixing ring arranged on the abutting pipe in a sleeved mode, a connecting rod arranged on the fixing ring, a connecting plate connected with one end of the fixing ring and a fixing bolt used for fixing the fixing ring and the abutting pipe, the fixing ring is a semicircular ring, the inner wall of the fixing ring is attached to the outer wall of the abutting pipe, one end of the fixing bolt penetrates through the fixing ring to stretch into the abutting pipe, and the driving motor is arranged on the connecting plate.

Through adopting above-mentioned technical scheme, with driving motor with support to be connected fixedly between the tight pipe through the link for drive assembly can dismantle to be fixed on supporting tight pipe, can carry out repeated dismantlement and use, saves construction cost.

The present application may be further configured in a preferred example to: every the tight pipe lower extreme that supports all is provided with the bracing piece, every the bracing piece is kept away from and is supported tight pipe one end and all offsets with the deep basal pit diapire.

Through adopting above-mentioned technical scheme, setting up the bracing piece below supporting tight pipe, the bracing piece plays the supporting role to supporting tight pipe body, effectively strengthens supporting tight tubular structure intensity, and then makes the support element support firm more to the knee wall, further strengthens the supporting role of knee wall to the deep basal pit lateral wall.

To sum up, the application comprises the following beneficial technical effects:

1. the supporting units are arranged between two adjacent and opposite supporting walls, one end of each abutting pipe is inserted into the corresponding jack, the two abutting pipes are connected through the connecting cylinders, the connecting cylinders are driven to rotate, the connecting cylinders are provided with flanges and abut against the abutting pipes, and then the two fixing balls abut against the corresponding supporting walls respectively, so that the supporting units and the supporting walls are fixed;

2. when the supporting unit needs to be disassembled, accumulated water in the abutting pipe can be pumped out through the power of a water pump, so that the obstruction of water pressure in the abutting pipe is reduced when the connecting cylinder and the abutting pipe are separated, and the supporting unit is more convenient to disassemble;

3. the supporting rod is arranged at the lower end of the abutting pipe, the supporting rod is supported at the bottom side of the deep foundation pit, the abutting pipe is supported, the possibility that the abutting pipe is broken due to the fact that the end portion of the abutting pipe is under too large pressure is reduced, and the supporting unit can support the supporting wall more stably.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is a schematic view of an exploded structure of a single support unit according to the present invention.

Description of reference numerals:

1. a support wall; 11. a jack; 2. a support assembly; 21. abutting the pipe; 211. an external thread; 22. a connecting cylinder; 221. a water through hole; 222. a thread groove; 3. fixing the ball; 4. flanging; 5. a drive assembly; 51. a drive motor; 52. a power gear; 53. a connecting frame; 531. a fixing ring; 532. a connecting rod; 533. a connecting plate; 534. fixing the bolt; 6. a drain pipe; 61. a drain hole; 7. a control component; 71. a closing plate; 72. screwing the ring plate; 722. an internal thread; 8. a secondary pipe; 9. a water pumping assembly; 91. a main pipe; 92. a water pump; 10. a stationary ring plate; 20. a driven gear; 30. a support rod.

Detailed Description

The present invention is described in further detail below with reference to figures 1-3.

The embodiment of the invention discloses a deep foundation pit supporting system which comprises four supporting walls 1 surrounding the periphery of a deep foundation pit and a plurality of supporting units, wherein the four supporting walls 1 are sequentially connected and are attached to the side wall of the deep foundation pit, and each supporting unit comprises a supporting component 2 and a fixing component for fixing the supporting component 2 and the supporting wall 1. The number of the supporting units can be determined according to the actual site construction condition, the supporting units can support the adjacent supporting walls 1 or two opposite supporting walls 1, and the supporting units are spaced from each other.

After the deep foundation pit is excavated, concrete is poured along the side wall of the deep foundation pit to form a support wall 1, the support wall 1 plays a supporting role for the side wall of the deep foundation pit, a support unit is installed between two adjacent or opposite support walls 1, so that the support unit applies a force which is far away from each other between the adjacent and opposite support walls 1, the support walls 1 are tightly abutted against the side wall of the deep foundation pit, and the supporting role of the support wall 1 for the side wall of the deep foundation pit is further improved.

As shown in fig. 2 and 3, the supporting component 2 includes two supporting pipes 21 and a connecting cylinder 22 for connecting the two supporting pipes 21, the two supporting pipes 21 are hollow round pipe-shaped steel pipes, a plurality of insertion holes 11 penetrating through the supporting wall 1 are formed in the supporting wall 1, one ends of the two supporting pipes 21, which are far away from each other, are respectively inserted into the insertion holes 11 formed in the adjacent or two opposite supporting walls 1, and the insertion holes 11 are formed along the corresponding supporting pipes 21. Connecting cylinder 22 is cylindricly, offers the thread groove 222 that runs through connecting cylinder 22 along connecting cylinder 22 length direction, and a is supported tight pipe 21 and is kept away from the lateral surface of the one end of knee wall 1 and has seted up external screw thread 211, and connecting cylinder 22 one end and external screw thread 211 spiro union, the other end is turned over inwards and is formed turn-ups 4, and turn-ups 4 keep away from connecting cylinder 22 one end and insert in another support tight pipe 21.

The fixed subassembly includes two fixed balls 3, and two fixed balls 3 are fixed in respectively and support the pipe 21 one end of keeping away from each other, and fixed ball 3 size is greater than the jack 11 size, and 3 lateral surfaces of fixed ball offset with the jack 11 drill way. The abutting pipe 21 screwed with the connecting cylinder 22 is provided with a driving assembly 5 for driving the connecting cylinder 22 to rotate at a position close to the connecting cylinder 22.

When the fixed stay unit, at first insert corresponding jack 11 respectively with two tight pipes 21 of supporting in, make connecting cylinder 22 one end and one support tight pipe 21 and go up external screw thread 211 spiro union, the turn-ups 4 of the other end offsets with the pipe orifice of supporting tight pipe 21, drive assembly 5 drives connecting cylinder 22 toward turn-ups 4 one side direction rotation this moment, treat that two fixed balls 3 all support tightly with knee wall 1, can accomplish single support unit's installation, treat that the construction is accomplished, the workman can drive connecting cylinder 22 through drive assembly 5 and toward keeping away from turn-ups 4 one side direction rotation, and then make two support tight pipe 21 separations, can take off support unit and carry out cyclic utilization, construction cost is reduced.

Support and communicate each other between tight pipe 21, jack 11 and the connecting cylinder 22, and support tight pipe 21 one end and pass jack 11, contact with the deep basal pit lateral wall, and then the ponding of deep basal pit lateral wall can pass through jack 11 and get into and support tight pipe 21 in, reduce the pressure of deep basal pit lateral wall to knee wall 1 and support element, and then improve knee wall 1 to the supporting role of lateral wall. And the accumulated water collected in the abutting pipe 21 plays a supporting role on the inner wall of the abutting pipe 21, so that the possibility that the end part of the abutting pipe 21 is excessively abutted against the supporting wall 1 to break the pipe body of the abutting pipe 21 is reduced.

One end of the abutting pipe 21 inserted into the insertion hole 11 is connected with the drain pipe 6 in a threaded mode, a plurality of drain holes 61 are formed in the drain pipe 6 at intervals along the length direction of the drain pipe 6, the drain pipe 6 is inserted into the side wall of the deep foundation pit, the drainage effect is achieved on accumulated water in the side wall, the accumulated water is drained into the abutting pipe 21, the pressure of the side wall of the deep foundation pit on the supporting wall 1 is further reduced, and the supporting effect of the supporting wall 1 on the side wall is further improved.

The driving assembly 5 comprises a driving motor 51, a connecting frame 53 and a power gear 52, wherein the connecting frame 53 is used for connecting the driving motor 51 with the abutting pipe 21, the power gear 52 is connected with an output shaft of the driving motor 51, the driving motor 51 is a servo motor, a circle of driven gears 20 are mounted on the outer side of each connecting cylinder 22, the driven gears 20 are meshed with the power gear 52, the length of the power gear 52 is the same as that of the connecting cylinder 22, and the connecting frame 53 is mounted on the abutting pipe 21, the end part of which is provided with an external thread 211.

The connecting frame 53 includes a fixing ring 531 sleeved outside the abutting pipe 21, a connecting rod 532 connected to the lower end of the fixing ring 531, a connecting plate 533 vertically connected to one end of the connecting rod 532 far from the fixing ring 531, and a fixing bolt 534. The fixing ring 531 is a semicircular ring and is hung on the abutting pipe 21 in the vertical direction, one end of the fixing bolt 534 passes through the upper end of the fixing ring 531 and extends into the abutting pipe 21, and the driving motor 51 is fixedly installed on the connecting plate 533.

When the abutting pipe 21 is moved to abut the fixing ball 3 against the corresponding support wall 1, the driving motor 51 is manually driven to drive the power gear 52 to rotate, the power gear 52 drives the driven gear 20 engaged with the power gear 52 to rotate, the length of the power gear 52 is long, and the driven gear 20 and the power gear 52 slide relatively, so that the fixing and supporting unit is realized.

The driving motor 51 is installed on the connecting plate 533, the connecting frame 53 is fixed with the abutting pipe 21 through the fixing bolt 534, the connecting frame 53 is convenient to fix and disassemble the abutting pipe 21, the driving assembly 5 can be repeatedly used, and in a construction site, the fixed installation of all supporting units can be completed by one group of driving assemblies 5, so that the construction cost is low.

After the supporting unit is fixed in position, the worker is at every bracing piece 30 of supporting the equal welded fastening in pipe 21 lower extreme middle part, and bracing piece 30 plays the supporting role to supporting pipe 21, reduces to support pipe 21 middle part and receives both ends and support the power and cracked possibility, effectively strengthens whole supporting unit's structural strength.

As shown in fig. 1 and 3, in order to facilitate the detachment of the supporting unit, the possibility that the supporting unit 21 is difficult to be separated from the connecting cylinder 22 due to excessive water pressure inside the abutting pipe 21 is reduced, and the water pumping assembly 9 is used for pumping out accumulated water inside the supporting unit and then detaching the supporting unit.

Both ends all set up limbers 221 about the middle part of connecting cylinder 22, all install the fixed ring board 10 of round outside every limbers 221, and the lateral surface of one end of connecting cylinder 22 is kept away from to fixed ring board 10 all is equipped with external screw thread 211, installs the control assembly 7 that is used for the switching limbers 221 on the fixed ring board 10.

The control assembly 7 comprises a closing plate 71 and a bolt connection ring plate 72 arranged on the circumferential direction of one side of the closing plate 71, the closing plate 71 and the bolt connection ring plate 72 are integrally formed, an inner thread 722 is formed on the inner side wall of the bolt connection ring plate 72, and the bolt connection ring plate 72 is in bolt connection with the outer thread 211.

When the water through hole 221 is closed, the water through hole 221 is shielded by the threaded ring plate 72 and the fixed ring plate 10 in a threaded manner, when drainage is needed, the auxiliary pipe 8 is sleeved between the two connecting cylinders 22 which are adjacent in the vertical direction, the auxiliary pipe 8 is a hose, the diameter of the end part of the auxiliary pipe is slightly smaller than that of the fixed ring plate 10, the auxiliary pipe 8 is made of elastic materials, and when the auxiliary pipe is sleeved on the fixed ring plate 10, the auxiliary pipe is tightly sleeved with the end part of the fixed ring plate 10.

The water pumping assembly 9 comprises a main pipe 91 communicated with the auxiliary pipe 8 and a water pumping pump 92 communicated with one end of the main pipe 91, accumulated water in the abutting pipe 21 flows through the auxiliary pipe 8 and the main pipe 91, and is finally pumped out of the abutting pipe 21 under the action of the water pumping pump 92.

The implementation principle of the embodiment of the application is as follows:

pouring concrete all around in the deep basal pit forms knee wall 1, offer jack 11 on the knee wall 1, will support tight pipe 21 both ends and insert respectively and establish in corresponding jack 11, connecting cylinder 22 one end and a support tight pipe 21 spiro union, other end turn-ups 4 offsets with another support tight pipe 21, drive driving motor 51 drives power gear 52 and rotates this moment, power gear 52 drives driven gear 20 rotation of meshing with it, and then drive connecting cylinder 22 rotates, make two support tight pipe 21 keep away from each other, and fixed ball 3 supports tightly with knee wall 1, treat that the construction finishes, drive connecting cylinder 22 is toward keeping away from turn-ups 4 direction and rotates, can be with two support tight pipe 21 separations, and then take off the support unit and recycle.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a deep basal pit braced system, includes polylith knee wall (1) around deep basal pit a week, its characterized in that: the supporting device is characterized by further comprising a plurality of supporting units for supporting two supporting walls (1), each supporting unit comprises a supporting component (2) and a fixing component for fixing the supporting component (2) and the supporting wall (1), each supporting wall (1) is provided with a plurality of jacks (11), each supporting component (2) comprises two abutting pipes (21) with one ends respectively inserted into the jacks (11) on different supporting walls (1) and a connecting cylinder (22) for communicating the two abutting pipes (21), an external thread (211) is arranged on the outer side surface of one abutting pipe (21) close to the connecting piece, one end of each connecting cylinder (22) is in threaded connection with the external thread (211) on the corresponding abutting pipe (21), the other end of each connecting cylinder is turned inwards to form a flange (4), the flange (4) is abutted against the pipe orifice of the other abutting pipe (21), and one abutting pipe (21) is provided with a driving component (5) for driving the connecting cylinder (22) to rotate, the fixed assembly comprises fixed balls (3) which are respectively sleeved and fixed on the outer sides of the corresponding abutting pipes (21) and far away from one end each other, the ball diameters of the fixed balls (3) are larger than the hole diameters of the insertion holes (11), and the outer side faces of the fixed balls (3) are abutted tightly with the hole openings of the insertion holes (11).

2. The deep foundation pit support system of claim 1, wherein: every it has drain pipe (6) to support tight pipe (21) to insert equal spiro union of jack (11) one end, every drain pipe (6) all with correspond to support tight pipe (21) intercommunication, every a plurality of wash ports (61) have all been seted up on drain pipe (6), every drain pipe (6) all insert in the deep basal pit lateral wall.

3. The deep foundation pit support system of claim 1, wherein: a plurality of supporting units are arranged on the two opposite supporting walls (1) and the two adjacent supporting walls (1) and are spaced from each other.

4. A deep foundation pit bracing system according to claim 3, wherein: every two limbers (221) have all been seted up on connecting cylinder (22), every limbers (221) department all is provided with control assembly (7) that are used for switching limbers (221), from top to bottom all be provided with auxiliary pipe (8) on two limbers (221) that are close to each other, the below is auxiliary pipe (8) one end is provided with water pumping component (9), water pumping component (9) include be responsible for (91) and with be responsible for water suction pump (92) of (91) one end intercommunication with auxiliary pipe (8) intercommunication.

5. The deep foundation pit support system of claim 4, wherein: a circle of fixed ring plate (10) is arranged at the position of the water through hole (221), the diameter of the auxiliary pipe (8) is smaller than the size of the fixed ring plate (10), and the auxiliary pipe (8) is sleeved on the corresponding fixed ring plate (10).

6. The deep foundation pit support system of claim 1, wherein: drive assembly (5) including set up driving motor (51) on supporting tight pipe (21) with connecting cylinder (22) spiro union and with power gear (52) of the output shaft of driving motor (51), connecting cylinder (22) lateral surface all overlaps and is equipped with driven gear (20), driven gear (20) and power gear (52) meshing, just power gear (52) extend the setting along connecting cylinder (22) length direction.

7. The deep foundation pit support system of claim 6, wherein: drive assembly (5) are still including connecting driving motor (51) and link (53) to tight pipe (21), link (53) are including the cover establish solid fixed ring (531) on supporting tight pipe (21), set up connecting rod (532) on solid fixed ring (531), keep away from connecting plate (533) that solid fixed ring (531) one end is connected and be used for fixed ring (531) and fixed bolt (534) to supporting tight pipe (21) with connecting rod (532), gu fixed ring (531) are the semicircle ring, gu fixed ring (531) inner wall with support tight pipe (21) outer wall laminating, fixed bolt (534) one end is passed solid fixed ring (531) and is stretched into in supporting tight pipe (21), driving motor (51) set up on connecting plate (533).

8. The deep foundation pit support system of claim 7, wherein: every the tight pipe (21) lower extreme that supports all is provided with bracing piece (30), every bracing piece (30) are kept away from and are supported tight pipe (21) one end and all offset with deep basal pit diapire.