Three-pile-in-one supporting structure of underpinning pile, stand column pile and uplift pile

Abstract

The invention belongs to the technical field of supporting, and discloses an underpinning pile, stand column pile and uplift pile three-in-one supporting structure which comprises an existing pile column and further comprises first profile steel, the first profile steel is vertically arranged in a foundation pit and located on the side face of the existing pile column, a bearing table is welded to the top of the first profile steel, an extension pile is supported on the bearing table through a hydraulic cylinder, and the extension pile is arranged on the top of the first profile steel. The extension piles are poured on the two sides of the existing pile column. The section steel II is vertically arranged in the foundation pit and is positioned on the same horizontal plane with the section steel I; the positioning mechanism is arranged on the side surfaces of the profile steel I and the profile steel II and is used for enabling the profile steel I and the profile steel II to be parallel; the foundation pit is excavated in the side face of the existing pile column, the first profile steel and the second profile steel are placed in the pit and then positioned through the positioning mechanism, the position of the first profile steel is stable, the existing pile column can be supported through the bearing table, the hydraulic cylinder and the extension pile after pouring, and therefore the pile underpinning effect is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of support, and specifically relates to a support structure that combines a replacement pile, a column pile, and an uplift pile into one Background Technique

[0002] In recent years, with the advancement of urban construction, the waterfront areas along the Huangpu River such as Xuhui Riverside, Jiangnan Shipyard, and North Bund have been successively renovated. However, most of them have relatively little protection for industrial heritage, and it is difficult to form an overall style with the characteristics of industrial areas in the waterfront areas. As one of the few undeveloped and intact industrial areas in Shanghai at present, how to reasonably protect and reuse these precious industrial heritages will play an important exemplary role in the renovation of industrial heritages in the waterfront areas of Shanghai.

[0003] When developing underground space under existing large-scale industrial buildings, the foundation type and stress state of the existing buildings are changed. Whether the upper structure of the existing buildings is safe becomes a key issue, which is closely related to the structure, foundation type, and site stratum conditions of the existing buildings. When excavating under a building, the excavation plane and vertical space are relatively narrow, and the construction equipment size, working environment, construction method, working efficiency, etc. are different from those of conventional underground projects, facing new challenges. There are two major problems in adding underground space under existing buildings: 1) how to ensure the safety of the upper structure during the implementation of the underground space; 2) in the presence of existing buildings, the construction plane range and net height are limited, and how to realize the excavation of the underground space. The above two aspects involve multiple key technical problems.

[0004] Current research mostly focuses on the analysis of the mechanical properties of single piles, lacking a systematic study on the collaborative action of three piles (replacement piles, column piles, and uplift piles). Especially under complex working conditions (such as the rebound and uneven settlement of overconsolidated soil), the collaborative mechanical behavior of the three piles has not been fully explored. Summary of the Invention

[0005] To solve the problem that current research mostly focuses on the analysis of the mechanical properties of single piles, lacking a systematic study on the collaborative action of three piles (replacement piles, column piles, and uplift piles), especially under complex working conditions (such as the rebound and uneven settlement of overconsolidated soil), and the collaborative mechanical behavior of the three piles has not been fully explored as mentioned in the above background technique, the present invention provides a support structure that combines a replacement pile, a column pile, and an uplift pile into one.

[0006] To achieve the above object, the present invention provides the following technical solution: A support structure that combines a replacement pile, a column pile, and an uplift pile into one, including existing pile columns, and further including: Section steel 1, the section steel 1 stands vertically in the foundation pit and is located on the side of the existing pile column, a bearing platform is welded on the top of the section steel 1, the bearing platform supports an extension pile through a hydraulic cylinder, and the extension pile is cast on both sides of the existing pile column; Section steel 2, wherein the section steel 2 stands vertically in the foundation pit and is located on the same horizontal plane as the section steel 1; A positioning mechanism, which is arranged on the side of the first and second profile steels and is used to make the first and second profile steels parallel; An extension mechanism, which is arranged through the middle of the second section steel and is used for digging an oblique foundation pit; A drive motor, which is mounted on a side of the extension mechanism and is used to drive the extension mechanism to perform excavation; Vertical steel bars and transverse steel bars are slidably arranged on the positioning mechanism and are used to improve the strength of the pile column formed after pouring.

[0007] Preferably, the second steel section includes a steel plate, a pulley and a guide plate. The steel plate stands in a foundation pit. A hole is opened in the middle of the steel plate for the extension mechanism to pass through, and pulleys for reducing the sliding resistance of the extension mechanism are rotatably connected to the two side walls of the hole. The guide plate is welded to the side of the steel plate and is located at the hole.

[0008] Preferably, the guide plate is a parallelogram, and its top surface is inclined toward the steel plate.

[0009] Preferably, the positioning mechanism includes a positioning steel frame and positioning columns, the positioning columns are welded to both sides of the steel section 1 and the steel plate, and the positioning columns located on the same side of the steel section 1 and the steel plate are located at the same height, and the positioning columns can be engaged inside the positioning steel frame.

[0010] Preferably, the first clamping groove on the surface of the positioning steel frame through which the vertical and transverse steel bars can pass is staggered with the second clamping groove through which the positioning column can pass, and the number of both is not unique.

[0011] Preferably, the extension mechanism includes a hollow side plate, a synchronous belt, a digging roller, a transmission gear, a conveyor belt and a positioning plate. The hollow side plate is symmetrically arranged, the synchronous belt is arranged inside the hollow side plate, the digging roller rotates symmetrically at one end of the hollow side plate, the two digging rollers are connected by two transmission gears, and the rotation directions of the two digging rollers are opposite, the conveyor belt is arranged in the middle of the two digging rollers, and the positioning plate is fixedly installed on the side of the hollow side plate.

[0012] Preferably, the two rollers of the conveyor belt are rotatably connected to the hollow side plate, the synchronous belt and the conveyor belt share a roller close to the drive motor, the other end of the synchronous belt is transmission-connected to the digging roller, and the two transmission gears and the two digging rollers are arranged in a line.

[0013] Preferably, the driving motor is mounted on the positioning plate, and its output shaft is in transmission connection with the roller shaft shared by the conveyor belt and the synchronous belt through a coupling.

[0014] Preferably, both of the two hollow side plates fall on the top of the guide plate in the vertical direction, and the hollow side plates are also in contact with the pulleys.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By excavating a foundation pit on the side of an existing pile column, placing the first section of profiled steel and the second section of profiled steel into the pit and positioning them through a positioning mechanism, the present invention achieves the stable position of the first section of profiled steel. After pouring, the support for the existing pile column can be realized through the setting of the bearing platform, the hydraulic cylinder and the extension pile, so as to play the role of a replacement pile.

[0016] By making the length of the positioning steel frame exceed the distance between the steel plate and the first section of profiled steel and fixing it with transverse steel bars on the outside of the steel plate and the first section of profiled steel, a pile column in a T-shaped form is formed after pouring. By increasing the horizontal area at the upper end, the sharing of the load is realized, and thus the overall load capacity is improved.

[0017] By driving two excavation rollers to rotate in opposite directions by the driving motor, the excavation of the inclined foundation pit is realized. When the positioning plate contacts the steel plate, the penetration depth of the hollow side plates reaches the maximum. The driving motor, the synchronous belt and the belt on the surface of the conveyor belt are disassembled, and the roller shaft and the structure extending into the inclined foundation pit are retained. By arranging steel bars on the two roller shafts of the conveyor belt and implementing pouring, an inclined support structure with qualified strength can be obtained to increase the anti-pulling force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a three-dimensional structural diagram of the present invention; Figure 3 is a detailed structural diagram of the positioning mechanism of the present invention; Figure 4 is a schematic position diagram of the driving motor of the present invention; Figure 5 is a detailed structural diagram of the extension mechanism of the present invention; Figure 6 of the present invention Figure 5 is an enlarged schematic diagram of A; Figure 7 is a partial schematic diagram after pouring of the present invention.

[0019] In the figure: 1. Existing pile column; 101. Extended pile; 102. Hydraulic cylinder; 103. Bearing platform; 2. First section of profiled steel; 3. Second section of profiled steel; 301. Steel plate; 302. Pulley; 303. Guide plate; 4. Positioning mechanism; 401. Positioning steel frame; 402. Positioning column; 5. Extension mechanism; 501. Hollow side plate; 502. Synchronous belt; 503. Excavation roller; 504. Transmission gear; 505. Conveyor belt; 506. Positioning plate; 6. Driving motor; 7. Vertical steel bars; 8. Horizontal steel bars. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] As Figures 1 to 7 shown, the present invention provides a three-in-one support structure of underpinning pile, column pile and uplift pile, including an existing pile column 1, and further including: The first section of profiled steel 2, which is vertically erected in the foundation pit and located on the side of the existing pile column 1. A bearing platform 103 is welded to the top of the first section of profiled steel 2. The bearing platform 103 supports an extended pile 101 through a hydraulic cylinder 102, and the extended pile 101 is cast on both sides of the existing pile column 1; The second section of profiled steel 3, which is vertically erected in the foundation pit and on the same horizontal plane as the first section of profiled steel 2; A positioning mechanism 4, which is arranged on the sides of the first section of profiled steel 2 and the second section of profiled steel 3 and is used to make the first section of profiled steel 2 and the second section of profiled steel 3 parallel; An extension mechanism 5, which penetrates through the middle of the second section of profiled steel 3 and is used to excavate an inclined foundation pit; A driving motor 6, which is installed on the side of the extension mechanism 5 and is used to drive the extension mechanism 5 to excavate; Vertical steel bars 7 and horizontal steel bars 8, which slide through the positioning mechanism 4 and are used to improve the strength of the pile column formed after casting.

[0022] Adopting the above - mentioned scheme: By excavating a foundation pit on the side of the existing pile column 1, placing the first - type steel 2 and the second - type steel 3 in the pit and positioning them through the positioning mechanism 4, the position of the first - type steel 2 is stabilized. After pouring, the support for the existing pile column 1 can be realized through the setting of the bearing platform 103, the hydraulic cylinder 102 and the extended pile 101, thus playing the role of a replacement pile. At the same time, through the setting of the positioning mechanism 4 and the transverse steel bars 8, a support structure similar to a T - shape can be formed after pouring, thereby improving the support plate effect of the column pile. And through the setting of the extension mechanism 5, the side of the foundation pit can be excavated. By placing the extension mechanism 5 in the excavated inclined foundation pit, the effect of an uplift - resistant pile can be achieved after pouring, improving the construction effect under complex working conditions.

[0023] As Figure 3 , 4 shown, the second - type steel 3 includes a steel plate 301, a pulley 302 and a guide plate 303. The steel plate 301 stands in the foundation pit. A hole through which the extension mechanism 5 can pass is opened in the middle of the steel plate 301. And on both side walls of the hole, pulleys 302 for reducing the sliding resistance of the extension mechanism 5 are rotatably connected. The guide plate 303 is welded to the side of the steel plate 301 and is located at the hole.

[0024] Adopting the above - mentioned scheme: Through the set pulleys 302, during the excavation of the inclined foundation pit by the extension mechanism 5, the friction when the extension mechanism 5 moves can be reduced, thus facilitating the excavation. The set guide plate 303 can play an auxiliary positioning effect when placing the extension mechanism 5.

[0025] As Figure 4 shown, the guide plate 303 is a parallelogram, and its top surface inclines towards the steel plate 301.

[0026] Adopting the above - mentioned scheme: Through the inclined - surface design at the top of the guide plate 303, it can play a guiding role for the extension mechanism 5 after the extension mechanism 5 is placed between the first - type steel 2 and the second - type steel 3, enabling the extension mechanism 5 to enter the hole opened in the second - type steel 3, improving the simplicity of the operation.

[0027] As Figure 3 shown, the positioning mechanism 4 includes a positioning steel frame 401 and positioning columns 402. The positioning columns 402 are welded to both sides of the first - type steel 2 and the steel plate 301, and the positioning columns 402 on the same side of the first - type steel 2 and the steel plate 301 are at the same height. The positioning columns 402 can be engaged inside the positioning steel frame 401. The first card slots on the surface of the positioning steel frame 401 through which the vertical steel bars 7 and the transverse steel bars 8 can pass and the second card slots through which the positioning columns 402 can pass are arranged in a staggered manner, and the quantities of both are not unique.

[0028] The above scheme is adopted: through the cooperation of the positioning steel frame 401 and the positioning column 402, the steel section 2 and the steel plate 301 can be positioned, so as to realize the four-corner support form, and then the stability can be ensured during pouring. At the same time, it is convenient to adjust the distance between the steel section 2 and the steel plate 301 to adapt to various construction conditions, and additional vertical steel bars 7 can be arranged between the steel section 2 and the steel plate 301, and the specific situation is implemented according to the construction requirements; when the length of the positioning steel frame 401 exceeds the distance between the steel plate 301 and the steel section 2, the transverse steel bars 8 can be used to fix the outer sides of the steel plate 301 and the steel section 2, so as to form a T-shaped pile column after pouring, thereby improving the load capacity.

[0029] like Figures 3 - 6 As shown, the extension mechanism 5 includes a hollow side plate 501, a synchronous belt 502, a digging roller 503, a transmission gear 504, a conveyor belt 505 and a positioning plate 506. The hollow side plate 501 is symmetrically arranged, the synchronous belt 502 is arranged inside the hollow side plate 501, the digging roller 503 rotates symmetrically at one end of the hollow side plate 501, the two digging rollers 503 are connected by two transmission gears 504, and the rotation directions of the two digging rollers 503 are opposite, and the conveyor belt 505 is arranged in the middle of the two digging rollers 503. The positioning plate 506 is fixedly installed on the side of the hollow side plate 501, and the two rollers of the conveyor belt 505 are rotatably connected to the hollow side plate 501. The synchronous belt 502 and the conveyor belt 505 share a roller close to the drive motor 6. The other end of the synchronous belt 502 is connected to the excavation roller 503 for transmission. The two transmission gears 504 and the two excavation rollers 503 are arranged in a line. The drive motor 6 is installed on the positioning plate 506 and its output shaft is connected to the roller shared by the conveyor belt 505 and the synchronous belt 502 for transmission through a coupling.

[0030] The above scheme is adopted: the two hollow side plates 501 are connected by the provided excavation rollers 503 and the conveyor belt 505, so as to ensure that the two hollow side plates 501 are always parallel to each other, thereby achieving stability between the two hollow side plates 501; at the same time, the synchronous belt 502 is driven by the driving motor 6 to drive the excavation roller 503 to rotate, and under the transmission of the transmission gear 504, the two excavation rollers 503 rotate synchronously in opposite directions to achieve soil destruction and excavation, and the excavated soil falls on the conveyor belt 505. Since the conveyor belt 505 and the synchronous belt 502 share one of the roller shafts, the driving motor 6 can also drive the conveyor belt 505 to transport the soil falling thereon, thereby achieving oblique foundation pit excavation. When the excavation reaches a certain extent, the positioning plate 506 will contact the steel plate 301 to prevent excessive excavation and detachment of the hollow side plate 501.

[0031] It should be noted that: a support net can be arranged between the two hollow side plates 501 to prevent the collapse of the topsoil during excavation. After excavation, the driving motor 6, the synchronous belt 502 and the belt on the surface of the conveyor belt 505 can be detached, and the roller shafts are retained. By arranging steel bars on the two roller shafts of the conveyor belt 505 and implementing pouring, an inclined support structure with qualified strength can be obtained, thereby improving the anti-pulling ability; when excavating an inclined foundation pit, the angle can be manually controlled and thrust can be provided, or by additionally arranging a guiding inclined plate in advance, the extension mechanism 5 can slide on the guiding inclined plate by gravity to achieve slow excavation. It is also possible to accelerate the excavation by applying force on the premise of setting a guiding inclined plate.

[0032] As Figure 4 shown, both of the two hollow side plates 501 vertically fall on the top of the guiding plate 303, and the hollow side plate 501 also contacts the pulley 302.

[0033] Adopting the above scheme: through the contact between the hollow side plate 501 and the guiding plate 303, the hollow side plate 501 can be naturally inclined. At this time, the hollow side plate 501 abuts against the first section of profiled steel 2, thereby obtaining the maximum inclination angle of the inclined foundation pit.

[0034] The working principle and usage process of the present invention: During use, first excavate a foundation pit on the side of the existing pile column 1, place the first section of profiled steel 2 and the steel plate 301 in the pit, and then position them through the cooperation of the positioning steel frame 401 and the positioning column 402 to achieve the stable position of the first section of profiled steel 2; When the jacking ability needs to be borne, weld the bearing platform 103 to the first section of profiled steel 2, and pour the extension pile 101 on the side of the existing pile column 1. After pouring, use the hydraulic cylinder 102 to transfer the load received by the existing pile column 1 to the first section of profiled steel 2 to achieve the ability of the jacking pile. It is also possible to carry out pouring on this basis to improve the bearing capacity. The construction at this place needs to be carried out on a single side to prevent the load of the existing pile column 1 from decreasing or the settlement caused by insufficient friction with the soil during bilateral construction; When the bearing and supporting abilities need to be borne, after the first section of profiled steel 2 and the steel plate 301 are fixed through the positioning steel frame 401 and the positioning column 402, insert the vertical steel bars 7 and the horizontal steel bars 8 into the first card slots on the positioning steel frame 401 respectively and then carry out pouring. After pouring, due to the length of the positioning steel frame 401 and the connection of the horizontal steel bars 8, the poured pile column presents a T-shaped shape. By increasing the horizontal area at the upper end, the load can be shared, thereby improving the overall load capacity; When the tensile capacity needs to be borne, after the section steel - 2 and the steel plate 301 are fixed through the positioning steel frame 401 and the positioning column 402, the hollow side plate 501 is placed between the steel plate 301 and the section steel - 2 along the side of the steel plate 301. Under the oblique limit of the guide plate 303, the excavation roller 503 enters the hole opened in the steel plate 301. By starting the driving motor 6 to drive the synchronous belt 502 and the conveyor belt 505 to work, the synchronous belt 502 drives one of the excavation rollers 503 to rotate and drives the other excavation roller 503 to rotate synchronously and reversely through two transmission gears 504, so as to realize the excavation of the oblique foundation pit. The excavated soil is transported away through the conveyor belt 505. When the positioning plate 506 contacts the steel plate 301, the penetration depth of the hollow side plate 501 reaches the maximum. At this time, the detachable driving motor 6, the synchronous belt 502 and the belt on the surface of the conveyor belt 505 are removed, and the roller shaft and the structure deep into the oblique foundation pit are retained. By arranging steel bars on the two roller shafts of the conveyor belt 505 and implementing pouring, an oblique supporting structure with qualified strength can be obtained to increase the tensile capacity.

[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The supporting structure integrating underpinning piles, column piles and uplift piles, including existing pile columns (1), is characterized in that Also includes: A steel section one (2), the steel section one (2) standing vertically in the foundation pit and located on the side of the existing pile column (1), a bearing platform (103) being welded on the top of the steel section one (2), the bearing platform (103) supporting an extension pile (101) via a hydraulic cylinder (102), the extension pile (101) being cast on both sides of the existing pile column (1); Section steel 2 (3), the section steel 2 (3) is vertically erected in the foundation pit and is located on the same horizontal plane as section steel 1 (2); A positioning mechanism (4), the positioning mechanism (4) being arranged on the side of the first section steel (2) and the second section steel (3) and used to make the first section steel (2) and the second section steel (3) parallel; An extension mechanism (5), the extension mechanism (5) is arranged through the middle of the second steel section (3) and is used for digging an inclined foundation pit; a drive motor (6), the drive motor (6) being mounted on a side of the extension mechanism (5) and being used to drive the extension mechanism (5) to perform excavation; Vertical steel bars (7) and transverse steel bars (8), wherein the vertical steel bars (7) and transverse steel bars (8) are slidably arranged on the positioning mechanism (4) and are used to improve the strength of the pile column formed after pouring.

2. The combined supporting structure of underpinning pile, column pile and uplift pile as claimed in claim 1, wherein: The second steel section (3) comprises a steel plate (301), a pulley (302) and a guide plate (303); the steel plate (301) is erected in the foundation pit; a hole is provided in the middle of the steel plate (301) for the extension mechanism (5) to pass through; and pulleys (302) for reducing the sliding resistance of the extension mechanism (5) are rotatably connected to the two side walls of the hole; the guide plate (303) is welded to the side of the steel plate (301) and is located at the hole.

3. The underpinning pile, column pile, and uplift pile three-pile integrated support structure according to claim 2, characterized in that: The guide plate (303) is in the shape of a parallelogram, and its top surface is inclined toward the steel plate (301).

4. The underpinning pile, column pile, and uplift pile three-pile integrated support structure according to claim 2, characterized in that: The positioning mechanism (4) comprises a positioning steel frame (401) and positioning columns (402), wherein the positioning columns (402) are welded to both sides of the section steel (2) and the steel plate (301), and the positioning columns (402) located on the same side of the section steel (2) and the steel plate (301) are located at the same height, and the positioning columns (402) can be engaged inside the positioning steel frame (401).

5. The underpinning pile, column pile, and uplift pile three-pile integrated support structure according to claim 4, characterized in that: The first clamping groove on the surface of the positioning steel frame (401) through which the vertical steel bars (7) and the transverse steel bars (8) can pass is staggered with the second clamping groove through which the positioning column (402) can pass, and the number of both is not unique.

6. The underpinning pile, column pile, and uplift pile three-pile integrated support structure according to claim 2, wherein: The extending mechanism (5) comprises a hollow side plate (501), a synchronous belt (502), an excavating roller (503), a transmission gear (504), a conveyor belt (505) and a positioning plate (506); the hollow side plate (501) is symmetrically arranged; the synchronous belt (502) is arranged inside the hollow side plate (501); the excavating roller (503) rotates symmetrically at one end of the hollow side plate (501); the two excavating rollers (503) are connected by two transmission gears (504); and the two excavating rollers (503) rotate in opposite directions; the conveyor belt (505) is arranged in the middle of the two excavating rollers (503); and the positioning plate (506) is fixedly mounted on the side of the hollow side plate (501).

7. The underpinning pile, column pile, and uplift pile three-pile integrated support structure according to claim 6, characterized in that: Both rollers of the conveyor belt (505) are rotatably connected to the hollow side plates (501). The synchronous belt (502) shares a roller close to the drive motor (6) with the conveyor belt (505). The other end of the synchronous belt (502) is drivingly connected to the excavation roller (503). The two transmission gears (504) and the two excavation rollers (503) are arranged in a line.

8. The underpinning pile, column pile, and uplift pile triple-pile integrated support structure according to claim 7, wherein: The drive motor (6) is installed on the positioning plate (506), and its output shaft is drivingly connected to the roller shared by the conveyor belt (505) and the synchronous belt (502) through a coupling.

9. The underpinning pile, column pile, and uplift pile three-pile integrated support structure according to claim 6, characterized in that: Both of the hollow side plates (501) are located on the top of the guide plate (303) in the vertical direction, and the hollow side plates (501) are also in contact with the pulleys (302).

Images