CN113026764A - Coastal soft soil deep foundation pit supporting structure and construction method - Google Patents

Abstract

The invention provides a coastal soft soil deep foundation pit supporting structure and a construction method, belonging to the technical field of foundation pit supporting, and comprising a base, an annular supporting plate, a supporting upright post, a supporting rod, a reinforcing plate, a transmission mechanism and a driving mechanism; the base is provided with an installation block and an accommodating groove, and the support upright post is fixedly arranged on the installation block; the supporting upright post is provided with an opening and a first rotating shaft; one end of the supporting rod is fixedly arranged on the corresponding first rotating shaft, and the driving mechanism is started to drive the transmission mechanism to move so as to drive the first rotating shaft and the supporting rod to rotate and press the reinforcing plate on the annular supporting plate. According to the coastal soft soil deep foundation pit supporting structure provided by the invention, the supporting rods and the reinforcing plates are driven by the driving mechanism and the transmission mechanism to be tightly pressed on the annular supporting plate, the working efficiency is higher, the driving mechanism continuously provides extrusion force for the supporting rods and the reinforcing rods, rainwater cannot contact with the side surface of the foundation pit, and the reliability of the foundation pit is improved.

Description

Coastal soft soil deep foundation pit supporting structure and construction method

Technical Field

The invention belongs to the technical field of foundation pit supporting, and particularly relates to a coastal soft soil deep foundation pit supporting structure and a construction method.

Background

The main function of the foundation pit is to provide a space, so that the building operation of the foundation can be carried out according to the position designated by the design, and in order to ensure the safety of the construction of the underground structure and the surrounding environment of the foundation pit, the side wall of the foundation pit is generally required to be subjected to supporting and retaining, reinforcing and other supporting measures. The existing foundation pit supporting system is not firm enough for supporting the foundation pit, and the phenomena of collapse, separation and the like are easy to occur particularly when the lower side of the inner wall of the foundation pit bears large pressure, so that the foundation pit cannot be normally used; meanwhile, when the foundation pit is supported, the manual installation operation efficiency is low.

Disclosure of Invention

The invention aims to provide a coastal soft soil deep foundation pit supporting structure and a construction method, and aims to solve the technical problems that a foundation pit supporting mode in the prior art is not firm and the working efficiency is low.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a coastal soft soil deep basal pit supporting construction, includes:

the device comprises a base, an annular supporting and protecting plate, a supporting upright post, a supporting and protecting rod, a reinforcing plate, a transmission mechanism and a driving mechanism; the base is used for being installed on the bottom surface of the foundation pit; the upper end face of the base is provided with an installation block and a plurality of accommodating grooves; the annular supporting plate is arranged on the base; the outer side surface of the annular supporting and protecting plate is attached to the outer side surface of the foundation pit; the supporting upright post is fixedly arranged on the mounting block; the supporting upright posts are of hollow structures; a plurality of openings arranged along the circumferential direction and a first rotating shaft rotatably connected to each opening are arranged on the outer side surface of the supporting upright post; the number of the supporting rods is multiple, and one end of each supporting rod is fixedly arranged on the corresponding first rotating shaft; the number of the reinforcing plates is multiple, and the reinforcing plates correspond to the supporting rods one by one; the other end of the supporting rod is hinged with one side surface of the reinforcing plate, and the other side surface of the reinforcing plate is used for supporting the annular supporting plate; the transmission mechanism is fixedly arranged on the first rotating shaft; one end of the transmission mechanism penetrates through the opening and is positioned in the hollow structure; the driving mechanism is arranged in the hollow structure and is connected with the transmission mechanism; and starting the driving mechanism to drive the transmission mechanism to move, driving the first rotating shaft and the supporting rod to rotate, and pressing the reinforcing plate on the annular supporting plate.

As another embodiment of the present application, the transmission mechanism is a transmission gear fixedly connected to the first rotating shaft; the driving mechanism comprises a sliding block which is connected in the hollow structure in a sliding way, a plurality of racks which are fixedly arranged on the outer side surface of the sliding block, a linear driver which is fixedly arranged in the hollow structure and a controller which is arranged on the supporting upright post; each rack is meshed with the corresponding transmission gear, the free end of the linear driver is fixedly connected with the upper end of the sliding block, and the controller is electrically connected with the linear driver.

As another embodiment of the application, two transmission gears are arranged and are respectively arranged on two sides of the supporting rod; the sliding block is provided with a plurality of mounting planes, the mounting planes are provided with mounting grooves, and the racks are mounted in the mounting grooves; the rack is meshed with the two transmission gears.

As another embodiment of this application, all be equipped with the screw on the free end of linear actuator with on the slider, linear actuator with connect through adjusting screw between the slider, adjusting screw's both ends respectively with two the screw is connected.

As another embodiment of the present application, a support plate is disposed on the hollow structure, the linear actuator is disposed on the support plate, a mounting hole is disposed on the support plate, and the slider is located below the support plate; and the free end of the linear driver passes through the mounting hole and is fixedly connected with the sliding block.

As another embodiment of the application, two mounting plates which are arranged at intervals are arranged on one side surface of the reinforcing plate, and first connecting holes which are coaxially arranged are arranged on the two mounting plates; the supporting rod comprises a rod body and a connecting block, and one end of the rod body is fixedly connected with the first rotating shaft on the supporting upright post; the connecting block is fixedly arranged at the other end of the rod body; the connecting block is provided with a second connecting hole; the connecting block is arranged between the two mounting plates, and the two first connecting holes correspond to the second connecting holes; the connecting block is connected with the two mounting plates through a second rotating shaft.

As another embodiment of the present application, a plurality of strip grooves are formed on the outer side surface of the support column, and the length direction of the strip grooves is consistent with the length direction of the support column; the opening is formed in the bottom surface of the long-strip groove; the rod body and the connecting block are arranged in the strip-shaped groove.

As another embodiment of this application, it is a plurality of the bracing piece is followed support column's circumference equipartition sets up, the another side of reinforcing plate be with annular support plate looks adaptation arcwall face.

As another embodiment of the application, an annular groove is formed in the supporting upright column, and a binding rope used for binding a plurality of supporting rods is arranged in the annular groove.

The coastal soft soil deep foundation pit supporting structure provided by the invention has the beneficial effects that: compared with the prior art, the coastal soft soil deep foundation pit supporting structure has the advantages that when the coastal soft soil deep foundation pit supporting structure is used, the base is firstly installed on the bottom surface of a foundation pit, the section size of the base is the same as that of the bottom surface of the foundation pit, the annular supporting and protecting plate is arranged on the base, the outer side surface of the annular supporting and protecting plate is attached to the outer side surface of the foundation pit, the supporting and protecting columns are fixedly arranged on the installation blocks of the base, the supporting and protecting rods and the first rotating shaft are driven to rotate for a certain angle by the aid of the driving mechanism and the transmission mechanism, the reinforcing plate is hinged to the other end of the supporting and protecting rod, the driving mechanism is started again to enable the supporting and protecting rods to continue to rotate to tightly extrude the reinforcing plate onto the annular supporting and protecting plate, the annular supporting and protecting plate is supported, the foundation pit is ensured not to collapse and the like, through this kind of mode, tightly compress tightly on annular backplate with the help of actuating mechanism and drive mechanism drive a plurality of fenders and reinforcing plate, work efficiency is higher to continue to provide the extrusion force for fenders and reinforcing rod by actuating mechanism, and the rainwater also can not contact with the foundation ditch side, improved the stability of foundation ditch.

Another object of the present invention is to provide a method for supporting and constructing a coastal soft soil deep foundation pit, including any one of the above supporting structures for a coastal soft soil deep foundation pit, further including:

installing the base on the bottom surface of the foundation pit, and arranging a first installation inclined plane surrounding the accommodating groove on the base;

a second installation inclined surface matched with the first installation inclined surface is arranged at the lower end of the annular supporting and protecting plate; a sealing groove is formed in the second installation inclined surface, and a sealing ring is arranged in the sealing groove; the annular supporting and protecting plate is matched with the inner wall of the foundation pit;

after a reinforcing plate is arranged at one end of the supporting rod, the driving mechanism is started, and the supporting rod and the first rotating shaft are driven to rotate by the aid of the transmission mechanism; so that the reinforcing plate is extruded on the annular supporting and protecting plate;

the holding tank on the base holds the rainwater, prevents that the rainwater from passing gap and foundation ditch inner wall contact between annular fender board and the base.

The invention provides a construction method for supporting a coastal soft soil deep foundation pit, which comprises the steps of firstly installing a base on the bottom surface of the foundation pit, enabling the cross section of the base to be the same as the bottom surface of the foundation pit, arranging an annular supporting and protecting plate on the base, enabling the outer side surface of the annular supporting and protecting plate to be attached to the outer side surface of the foundation pit, further fixedly arranging a supporting upright post on an installation block of the base, driving each supporting and protecting rod and a first rotating shaft to rotate for a certain angle by means of a driving mechanism and a transmission mechanism, hinging and installing a reinforcing plate at the other end of each supporting and protecting rod, starting the driving mechanism again to enable the supporting and protecting rods to continue to rotate to tightly press the reinforcing plate on the annular supporting and protecting plate, further supporting the annular supporting and protecting plate, ensuring that the foundation pit does not collapse and the like, storing rainwater on an accommodating groove of the base during raining, avoiding the rainwater from, the plurality of supporting rods and the reinforcing plate are tightly pressed on the annular supporting plate by means of the driving mechanism and the transmission mechanism, the working efficiency is high, the driving mechanism continuously provides extrusion force for the supporting rods and the reinforcing plate, rainwater cannot contact with the side face of the foundation pit, and the reliability of the foundation pit is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic view of an internal structure of a coastal soft soil deep foundation pit supporting structure provided by an embodiment of the present invention;

fig. 2 is a top view of a coastal soft soil deep foundation pit supporting structure provided by an embodiment of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a schematic view of an internal structure of a support column according to an embodiment of the present invention;

fig. 5 is a cross-sectional view taken along line B-B of fig. 4.

Wherein, in the figures, the respective reference numerals:

1. a base; 11. mounting blocks; 12. accommodating grooves; 13. a through hole; 14. a limiting block; 2. an annular supporting guard plate; 3. supporting the upright post; 31. a limiting hole; 32. a strip groove; 33. an annular groove; 34. tying a rope; 35. a first rotating shaft; 36. an opening; 4. a support bar; 41. a rod body; 42. connecting blocks; 43. a second rotating shaft; 5. A reinforcing plate; 51. mounting a plate; 52. an arc-shaped surface; 6. a transmission mechanism; 61. a transmission gear; 7. a drive mechanism; 71. a slider; 72. a rack; 73. a linear actuator; 74. a controller; 75. a screw hole; 76. adjusting the screw rod; 77. a support plate; 771. and (7) installing holes.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 5, a shores structure of the coastal soft soil deep foundation pit provided by the present invention will now be described. A coastal soft soil deep foundation pit supporting structure comprises a base 1, an annular supporting plate 2, a supporting upright post 3, a supporting rod 4, a reinforcing plate 5, a transmission mechanism 6 and a driving mechanism 7; the base 1 is used for being installed on the bottom surface of a foundation pit; the upper end surface of the base 1 is provided with a mounting block 11 and a plurality of accommodating grooves 12; the annular supporting and protecting plate 2 is arranged on the base 1; the outer side surface of the annular supporting and protecting plate 2 is attached to the outer side surface of the foundation pit; the supporting upright post 3 is fixedly arranged on the mounting block 11; the supporting upright posts 3 are of hollow structures; a plurality of openings 36 arranged along the circumferential direction and a first rotating shaft 35 rotatably connected to each opening 36 are arranged on the outer side surface of the supporting upright column 3; the number of the supporting rods 4 is multiple, and one end of each supporting rod is fixedly arranged on the corresponding first rotating shaft 35; the number of the reinforcing plates 5 is multiple, and the reinforcing plates correspond to the supporting rods 4 one by one; the other end of the supporting rod 4 is hinged with one side surface of the reinforcing plate 5, and the other side surface of the reinforcing plate 5 is used for supporting the annular supporting plate 2; the transmission mechanism 6 is fixedly arranged on the first rotating shaft 35; one end of the transmission mechanism 6 passes through the opening 36 and is positioned in the hollow structure; the driving mechanism 7 is arranged in the hollow structure and is connected with the transmission mechanism 6; the driving mechanism 7 is started to drive the transmission mechanism 6 to move, the first rotating shaft 35 and the supporting rod 4 are driven to rotate, and the reinforcing plate 5 is pressed on the annular supporting plate 2.

Compared with the prior art, the coastal soft soil deep foundation pit supporting structure provided by the invention has the advantages that when in use, the base 1 is firstly installed on the bottom surface of a foundation pit, the cross section size of the base 1 is the same as that of the bottom surface of the foundation pit, the annular supporting and protecting plate 2 is arranged on the base 1, the outer side surface of the annular supporting and protecting plate 2 is attached to the outer side surface of the foundation pit, the supporting upright posts 3 are fixedly arranged on the installation blocks 11 of the base 1, the supporting and protecting rods 4 and the first rotating shaft 35 are driven to rotate for a certain angle by the aid of the driving mechanism 7 and the transmission mechanism 6, the reinforcing plate 5 is hinged and installed at the other end of the supporting and protecting rod 4, the driving mechanism 7 is started again to enable the supporting and protecting rod 4 to continue to rotate to tightly extrude the reinforcing plate 5 on the annular supporting and protecting plate 2, the foundation pit is ensured not to collapse and the like, rainwater can be stored on the accommodating groove 12 of the base 1 when raining, and, through this kind of mode, tightly compress tightly on annular backplate 2 with the help of actuating mechanism 7 and drive mechanism 6 drive a plurality of bracing piece 4 and reinforcing plate 5, work efficiency is higher to by actuating mechanism 7 for bracing piece 4 and reinforcing rod continuously provide the extrusion force, and the rainwater also can not contact with the foundation ditch side, improved the reliability of foundation ditch.

The holding tank 12 is a plurality of, communicates through-hole 13 between two adjacent holding tanks 12, avoids the rainwater to gather in a holding tank 12. The mounting block 11 is provided with a limiting block 14, the lower end face of the support upright post 3 is provided with a limiting hole 31 which is used for being mounted in a matched manner with the limiting block 14, and the limiting hole 31 is a hexagon socket.

Referring to fig. 1, 4 and 5, as an embodiment of the support structure for the coastal soft soil deep foundation pit provided by the present invention, the transmission mechanism 6 is a transmission gear 61 fixedly connected to the first rotating shaft 35; the driving mechanism 7 comprises a sliding block 71 which is connected in a sliding way in the hollow structure, a plurality of racks 72 which are fixedly arranged on the outer side surface of the sliding block 71, a linear driver 73 which is fixedly arranged in the hollow structure and a controller 74 which is arranged on the supporting upright post 3; each rack 72 is meshed with the corresponding transmission gear 61, the free end of the linear driver 73 is fixedly connected with the upper end of the sliding block 71, and the controller 74 is electrically connected with the linear driver 73; the transmission gear 61 is connected to the first rotating shaft 35 through a key, a part of the transmission gear 61 penetrates through the opening 36 and enters the hollow structure, the sliding block 71 is slidably installed in the hollow structure, the rack 72 on the sliding block 71 is meshed with the transmission gear 61, the linear actuator 73 is started to control the sliding block 71 to slide up and down in the hollow structure, and then the transmission gear 61 is driven to rotate, so that the first rotating shaft 35, the support rod 4 and the reinforcing plate 5 are tightly extruded on the annular support and protection plate 2. The linear driver 73 is fixedly arranged on the support upright 3, and the free end of the linear driver is connected with the slide block 71, so that the slide block 71 can be stably and reliably driven to move up and down. The linear driver 73 may be an electric push rod, an air cylinder, or the like. The slider 71 is a square structure, and the rack 72 is provided on each of four side surfaces of the slider 71. The controller 74 is provided at the upper end of the support column 3 for easy manipulation.

Referring to fig. 4 and 5, as a specific embodiment of the support structure for the coastal soft soil deep foundation pit provided by the present invention, two transmission gears 61 are provided, and are respectively disposed on two sides of the support rod 4; a plurality of mounting planes are arranged on the sliding block 71, mounting grooves are formed in the mounting planes, and the racks 72 are mounted in the mounting grooves; the rack 72 is meshed with the two transmission gears 61; two transmission gears 61 are arranged on the first rotating shaft 35, the two transmission gears 61 are positioned at two sides of the support rod 4, and the rack 72 is meshed with the two transmission gears 61 at the same time, so that the two transmission gears 61 and the first rotating shaft 35 can be driven to rotate at the same time, and the support rod 4 and the reinforcing plate 5 are driven to rotate; the two transmission gears 61 are respectively arranged on two sides of the supporting rod 4, so that the whole supporting rod 4 is stressed uniformly.

Referring to fig. 1 and 4, as a specific embodiment of the supporting structure for the coastal soft soil deep foundation pit provided by the present invention, screw holes 75 are respectively formed on the free end of the linear actuator 73 and the slider 71, the linear actuator 73 and the slider 71 are connected by an adjusting screw 76, two ends of the adjusting screw 76 are respectively connected with the two screw holes 75, two ends of the adjusting screw 76 are respectively screwed on the free end of the linear actuator 73 and the slider 71, the slider 71 is driven to move by using the linear actuator 73 and the adjusting screw 76, when the extrusion force needs to be further increased or reduced for the annular supporting plate 2, the adjusting screw 76 is rotated, the effective working length of the adjusting screw 76 is changed, the sliding of the slider 71 is changed, and further, the rotating range of the transmission gear 61 is changed, so that the reinforcing plate 5 can be extruded more tightly or loosely.

Referring to fig. 1 and 4, as a specific embodiment of the support structure for the coastal soft soil deep foundation pit provided by the present invention, a support plate 77 is disposed on the hollow structure, a linear driver 73 is disposed on the support plate 77, a mounting hole 771 is disposed on the support plate 77, and a slider 71 is disposed below the support plate 77; the free end of the linear driver 73 passes through the mounting hole 771 to be fixedly connected with the slider 71, the support plate 77 is arranged to divide the hollow structure into an upper side and a lower side, the linear driver 73 is fixedly mounted on the support plate 77, the slider 71 is mounted in the hollow structure below the support plate 77, mutual interference does not exist between the two, and the slider 71 can be ensured to stably and reliably slide in the hollow structure. The free end of the linear actuator 73 is connected to the slider 71 through the mounting hole 771. The support plate 77 is welded within the hollow structure or the support plate 77 is integrally formed with the support post 3.

Referring to fig. 1 to 3, as a specific embodiment of the supporting structure for the coastal soft soil deep foundation pit provided by the present invention, two mounting plates 51 are disposed at an interval on one side surface of the reinforcing plate 5, and the two mounting plates 51 are both provided with first coaxial connecting holes; the supporting rod 4 comprises a rod body 41 and a connecting block 42, and one end of the rod body 41 is fixedly connected with the first rotating shaft 35 on the supporting upright post 3; the connecting block 42 is fixedly arranged at the other end of the rod body 41; the connecting block 42 is provided with a second connecting hole; the connecting block 42 is installed between the two mounting plates 51, and the two first connecting holes correspond to the second connecting holes; the connecting block 42 is connected with the two mounting plates 51 through the second rotating shaft 43; with two mounting panels 51 fixed connection on the side of reinforcing plate 5, and two mounting panels 51 interval sets up, then install connecting block 42 between two mounting panels 51, make first connecting hole align with the second connecting hole simultaneously, and use second pivot 43 to pass first connecting hole and second connecting hole, make connecting block 42 and two mounting panels 51 articulated together, and then realize being connected between bracing pole 4 and reinforcing plate 5, the drive body of rod 41 rotates during the use, with the help of being connected between connecting block 42 and two mounting panels 51, drive reinforcing plate 5 towards annular bracing board 2 on, and reinforcing plate 5 hugs closely annular bracing board 2 and sets up, continue to rotate bracing pole 4 and make bracing pole 4 exert pressure to reinforcing plate 5, and then make annular bracing board 2 produce better strengthening and supporting effect to the lateral wall of foundation ditch.

Referring to fig. 1 and 4, as a specific embodiment of the support structure for the coastal soft soil deep foundation pit provided by the present invention, a plurality of strip grooves 32 are provided on the outer side surface of the support column 3, and the length direction of the strip grooves 32 is the same as the length direction of the support column 3; the opening 36 is arranged on the bottom surface of the strip groove 32; the rod body 41 and the connecting block 42 are arranged in the strip groove 32; set up rectangular recess 32 and be used for installing body of rod 41 and connecting block 42, reduce the space that body of rod 41 and connecting block 42 occupy, especially after strutting the completion, install body of rod 41 and connecting block 42 in rectangular recess 32, can not leak outward and influence the size of whole support post 3, be convenient for transport, this support post 3 of transport. And an opening 36 is provided on the bottom surface of the elongated groove 32, the transmission mechanism 6 is mounted on the first rotating shaft 35, and a part of the transmission mechanism 6 is in the elongated groove 32 and is located in the hollow structure through the opening 36.

Referring to fig. 1 and 2, as a specific embodiment of the support structure for the coastal soft soil deep foundation pit provided by the present invention, a plurality of support rods 4 are uniformly distributed along the circumferential direction of the support column 3, and the other side surface of the reinforcing plate 5 is an arc surface 52 adapted to the annular support plate 2; after the reinforcing plate 5 is hinged to each supporting rod 4, each supporting rod 4 is operated to rotate and drive the reinforcing plate 5 to abut against the annular supporting plate 2, and because the length of each supporting rod 4 is greater than the distance between the outer side surface of the supporting upright post 3 and the annular supporting plate 2, after the reinforcing plate 5 abuts against the annular supporting plate 2, the supporting rods 4 continue to rotate, and the reinforcing plate 5 is tightly extruded on the annular supporting plate 2. Meanwhile, the mounting mode is very convenient to disassemble and assemble, and only the rotating support rod 4 needs to be operated; the other side of the reinforcing plate 5 is an arc-shaped surface 52 matched with the annular supporting and protecting plate 2, namely, the arc-shaped surface 52 of the reinforcing plate 5 moves close to the annular supporting and protecting plate 2, and the arc-shaped surface 52 is attached to the annular supporting and protecting plate 2, so that the acting area of the reinforcing plate 5 on the annular supporting and protecting plate 2 is increased, and the strong reinforcing and supporting effect on the annular supporting and protecting plate 2 can be ensured when the reinforcing plate 5 is extruded by the supporting and protecting rod 4.

Referring to fig. 1 and 4, as a specific embodiment of the support structure for the coastal soft soil deep foundation pit provided by the present invention, an annular groove 33 is provided on the support column 3, and a binding rope 34 for binding a plurality of support rods 4 is provided in the annular groove 33; after the reinforcing device for coastal soft soil deep foundation pit support is not used or is used, the supporting rods 4 are rotated towards the supporting upright posts 3, the supporting rods 4 are withdrawn into the supporting upright posts 3 or into the strip-shaped grooves 32 on the supporting upright posts 3, and then the binding ropes 34 stored on the annular grooves 33 fixedly connect the supporting rods 4 with the supporting upright posts 3. When the strengthening device for coastal soft soil deep foundation pit support is used for work, the binding rope 34 is temporarily stored in the annular groove 33. The binding rope 34 is a wire rope or the like.

In the figure, an embodiment of the present invention further provides a support construction method for a coastal soft soil deep foundation pit, where the support construction method for a coastal soft soil deep foundation pit includes any one of the above support structures for a coastal soft soil deep foundation pit, and further includes:

installing a base 1 on the bottom surface of a foundation pit, and arranging a first installation inclined plane around an accommodating groove 12 on the base 1;

a second installation inclined plane matched with the first installation inclined plane is arranged at the lower end of the annular supporting and protecting plate 2; a sealing groove is formed in the second mounting inclined plane, and a sealing ring is arranged in the sealing groove; the annular supporting and protecting plate 2 is matched with the inner wall of the foundation pit;

after a reinforcing plate 5 is arranged at one end of the supporting rod 4, a driving mechanism 7 is started, and the supporting rod 4 and the first rotating shaft 35 are driven to rotate by means of a transmission mechanism 6; thereby extruding the reinforcing plate 5 on the annular supporting and protecting plate 2;

the holding tank 12 on the base 1 holds the rainwater, prevents that the rainwater from passing the gap between annular backplate 2 and the base 1 and foundation ditch inner wall contact.

The invention provides a construction method for supporting a coastal soft soil deep foundation pit, which comprises the steps of firstly installing a base 1 on the bottom surface of the foundation pit, enabling the cross section size of the base 1 to be the same as that of the bottom surface of the foundation pit, arranging an annular supporting and protecting plate 2 on the base 1, enabling the outer side surface of the annular supporting and protecting plate 2 to be attached to the outer side surface of the foundation pit, further fixedly arranging a supporting upright post 3 on an installation block 11 of the base 1, driving each supporting and protecting rod 4 and a first rotating shaft 35 to rotate for a certain angle by means of a driving mechanism 7 and a transmission mechanism 6, hinging and installing a reinforcing plate 5 at the other end of the supporting and protecting rod 4, starting the driving mechanism 7 again to enable the supporting and protecting rod 4 to continue to rotate to tightly extrude the reinforcing plate 5 on the annular supporting and protecting plate 2, further achieving the purpose of supporting and protecting the annular supporting and protecting plate 2, ensuring that the foundation pit does not collapse and the like, storing rainwater on an accommodating groove, through this kind of mode, tightly compress tightly on annular backplate 2 with the help of actuating mechanism 7 and drive mechanism 6 drive a plurality of bracing piece 4 and reinforcing plate 5, work efficiency is higher to by actuating mechanism 7 for bracing piece 4 and reinforcing rod continuously provide the extrusion force, and the rainwater also can not contact with the foundation ditch side, improved the reliability of foundation ditch.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The coastal soft soil deep foundation pit supporting structure is characterized by comprising a base, an annular supporting plate, a supporting upright post, a supporting rod, a reinforcing plate, a transmission mechanism and a driving mechanism; the base is used for being installed on the bottom surface of the foundation pit; the upper end face of the base is provided with an installation block and a plurality of accommodating grooves; the annular supporting plate is arranged on the base; the outer side surface of the annular supporting and protecting plate is attached to the outer side surface of the foundation pit; the supporting upright post is fixedly arranged on the mounting block; the supporting upright posts are of hollow structures; a plurality of openings arranged along the circumferential direction and a first rotating shaft rotatably connected to each opening are arranged on the outer side surface of the supporting upright post; the number of the supporting rods is multiple, and one end of each supporting rod is fixedly arranged on the corresponding first rotating shaft; the number of the reinforcing plates is multiple, and the reinforcing plates correspond to the supporting rods one by one; the other end of the supporting rod is hinged with one side surface of the reinforcing plate, and the other side surface of the reinforcing plate is used for supporting the annular supporting plate; the transmission mechanism is fixedly arranged on the first rotating shaft; one end of the transmission mechanism penetrates through the opening and is positioned in the hollow structure; the driving mechanism is arranged in the hollow structure and is connected with the transmission mechanism; and starting the driving mechanism to drive the transmission mechanism to move, driving the first rotating shaft and the supporting rod to rotate, and pressing the reinforcing plate on the annular supporting plate.

2. The coastal soft soil deep foundation pit supporting structure of claim 1, wherein the transmission mechanism is a transmission gear fixedly connected to the first rotating shaft; the driving mechanism comprises a sliding block which is connected in the hollow structure in a sliding way, a plurality of racks which are fixedly arranged on the outer side surface of the sliding block, a linear driver which is fixedly arranged in the hollow structure and a controller which is arranged on the supporting upright post; each rack is meshed with the corresponding transmission gear, the free end of the linear driver is fixedly connected with the upper end of the sliding block, and the controller is electrically connected with the linear driver.

3. The coastal soft soil deep foundation pit supporting structure of claim 2, wherein two transmission gears are provided, and are respectively provided at both sides of the supporting rod; the sliding block is provided with a plurality of mounting planes, the mounting planes are provided with mounting grooves, and the racks are mounted in the mounting grooves; the rack is meshed with the two transmission gears.

4. The coastal soft soil deep foundation pit supporting structure of claim 2, wherein screw holes are formed on the free end of the linear actuator and the slide block, the linear actuator and the slide block are connected through an adjusting screw rod, and two ends of the adjusting screw rod are respectively connected with the two screw holes.

5. The coastal soft soil deep foundation pit supporting structure of claim 2, wherein a support plate is arranged on the hollow structure, the linear actuator is arranged on the support plate, a mounting hole is arranged on the support plate, and the sliding block is positioned below the support plate; and the free end of the linear driver passes through the mounting hole and is fixedly connected with the sliding block.

6. The coastal soft soil deep foundation pit supporting structure of claim 1, wherein one side surface of the reinforcing plate is provided with two mounting plates which are arranged at intervals, and the two mounting plates are provided with first connecting holes which are coaxially arranged; the supporting rod comprises a rod body and a connecting block, and one end of the rod body is fixedly connected with the first rotating shaft on the supporting upright post; the connecting block is fixedly arranged at the other end of the rod body; the connecting block is provided with a second connecting hole; the connecting block is arranged between the two mounting plates, and the two first connecting holes correspond to the second connecting holes; the connecting block is connected with the two mounting plates through a second rotating shaft.

7. The coastal soft soil deep foundation pit supporting structure of claim 6, wherein a plurality of strip grooves are formed on the outer side surface of the supporting column, and the length direction of the strip grooves is consistent with that of the supporting column; the opening is formed in the bottom surface of the long-strip groove; the rod body and the connecting block are arranged in the strip-shaped groove.

8. The coastal soft soil deep foundation pit supporting structure of claim 1, wherein a plurality of the supporting rods are uniformly distributed along the circumferential direction of the supporting upright column, and the other side surface of the reinforcing plate is an arc-shaped surface matched with the annular supporting plate.

9. The coastal soft soil deep foundation pit supporting structure of claim 1, wherein the supporting columns are provided with annular grooves, and binding ropes for binding the plurality of supporting rods are arranged in the annular grooves.

10. A coastal soft soil deep foundation pit support construction method, characterized by comprising the coastal soft soil deep foundation pit support structure according to any one of claims 1 to 9, further comprising:

installing the base on the bottom surface of the foundation pit, and arranging a first installation inclined plane surrounding the accommodating groove on the base;

a second installation inclined surface matched with the first installation inclined surface is arranged at the lower end of the annular supporting and protecting plate; a sealing groove is formed in the second installation inclined surface, and a sealing ring is arranged in the sealing groove; the annular supporting and protecting plate is matched with the inner wall of the foundation pit;

after a reinforcing plate is arranged at one end of the supporting rod, the driving mechanism is started, and the supporting rod and the first rotating shaft are driven to rotate by the aid of the transmission mechanism; so that the reinforcing plate is extruded on the annular supporting and protecting plate;

the holding tank on the base holds the rainwater, prevents that the rainwater from passing gap and foundation ditch inner wall contact between annular fender board and the base.

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