Foundation pit protection device with mold

Abstract

The embodiment of the invention provides a foundation pit protection device with a mold, and relates to the technical field of engineering machinery. The foundation pit protection device with the formwork comprises a frame, a protection cover plate and a plurality of formworks. The multiple templates are arranged on the outer periphery of the frame in the circumferential direction of the frame, and the multiple templates can move relative to the frame so as to be switched between an unfolded state and a folded state; in the unfolding state, all the templates are spliced to form a barrel shape; and in the retracting state, the two adjacent templates partially coincide in the circumferential direction. And the protective cover plate is arranged at the top of the frame. The efficiency and safety of the manual hole digging pile construction technology can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering equipment, in particular to a foundation pit belt formwork protection device. Background Art

[0002] In mountainous areas with steep terrain, where large drilling equipment is inaccessible or drilling platforms are difficult to construct, bored pile construction is often used. Bored pile construction is typically carried out layer by layer, starting from top to bottom. Each layer is broadly divided into the following steps: excavation, reinforcement binding for the retaining wall, formwork installation, and pouring of retaining wall concrete.

[0003] In the existing technology, the repetitive cycle of template installation and removal is cumbersome. For large-diameter holes, internal supports need to be added to reinforce the wall template. The overall workload is large, time-consuming and the fixed stability is poor. At the same time, the lifting in and out of the wall template and support increases the risk of falling, which in turn affects construction efficiency and safety. Summary of the Invention

[0004] The purpose of the present invention includes providing a foundation pit formwork protection device, which can improve the efficiency and safety of the manual bored pile construction process.

[0005] The embodiments of the present invention can be implemented as follows: The present invention provides a foundation pit formwork protection device, comprising: frame; A plurality of templates, each of which is disposed on an outer periphery of the frame along a circumferential direction of the frame, and each of which is movable relative to the frame to switch between an expanded state and a retracted state; in the expanded state, all of the templates are assembled to form a cylindrical shape; in the retracted state, two adjacent templates partially overlap in the circumferential direction; A protective cover plate is arranged on the top of the frame.

[0006] In an optional embodiment, the frame includes a top beam, a bottom beam, and a plurality of vertical beams; A plurality of vertical beams are arranged at intervals between the top beam and the bottom beam, and are connected to both the top beam and the bottom beam; The template is connected to the vertical beam through a connecting rod.

[0007] In an optional embodiment, a first connecting seat is provided on the inner side of the template, and a second connecting seat is provided on the outer side of the vertical beam; One end of the connecting rod is hinged to the first connecting seat, and the other end of the connecting rod is hinged to the second connecting seat.

[0008] In an optional embodiment, two first connecting seats are provided at intervals in the height direction of the template, and two second connecting seats are provided at intervals in the height direction of the vertical beam; Each of the templates is connected to two of the first connecting seats and the second connecting seats via two connecting rods.

[0009] In an optional embodiment, a second stopper is provided at the top of the first connecting seat, and a first stopper is provided at the bottom of the second connecting seat; When the template is in the expanded state, the side walls of the connecting rod abut against the first stop portion and the second stop portion respectively.

[0010] In an optional embodiment, the template includes a plurality of first templates and a plurality of second templates; The circular angle corresponding to the outer circumferential surface of the first template is smaller than the central angle corresponding to the inner circumferential surface of the first template, so as to form first inclined guide surfaces on both sides of the circumference of the first template; The circular angle corresponding to the outer circumference of the second template is greater than the central angle corresponding to the inner circumference of the second template, so as to form second inclined guide surfaces on both sides of the circumference of the second template; The first template and the second template are arranged at intervals on the outer periphery of the frame in the circumferential direction; In the expanded state, the first inclined guide surface and the second inclined guide surface of any adjacent first template and second template abut against each other; In the retracted state, the second template of any adjacent first template and second template is stacked on the outside of the first template in the radial direction.

[0011] In an optional embodiment, the first inclined guide surfaces formed on both sides of the first template in the circumferential direction have opposite inclination directions and equal inclination angles; The second inclined guide surfaces formed on both sides of the second template in the circumferential direction have opposite inclination directions and the same inclination angles.

[0012] In an optional embodiment, the inclination angle of the second inclined guide surface is greater than that of the first inclined guide surface.

[0013] In an optional embodiment, the lifting type foundation pit belt formwork protection device further includes a plurality of support screws; All the vertical beams connected to the first template are provided with threaded holes between the two second connecting seats, and the support screws are provided in the threaded holes. Rotating the support screws can abut against the first template and drive the first template to unfold with the second template.

[0014] In an optional embodiment, the foundation pit belt formwork protection device further includes a lifting device; A lifting part is provided on the top of the frame; The lifting rope of the lifting device is connected to the lifting part.

[0015] The beneficial effects of the foundation pit formwork protection device provided by the embodiment of the present invention include: The present application arranges multiple templates on the outer periphery of the frame along the circumference of the frame, and all the templates can move relative to the frame to switch between the expanded state and the retracted state. In the expanded state, all the templates are pieced together to form a cylindrical shape. In the retracted state, two adjacent templates partially overlap in the circumferential direction, and a protective cover is provided on the top of the frame. During construction, construction workers can stand in the frame to carry out excavation, thereby playing a protective role. At the same time, the frame and the expanded template can provide circumferential support for the upper layer of concrete for pouring retaining walls. After the next layer is excavated, the templates supporting the upper layer are stored, so that the foundation pit formwork protection device as a whole falls to the excavated layer. The template is then expanded to set the template before pouring, thereby improving construction efficiency. The foundation pit formwork protection device can shield the periphery and top of the construction environment during construction, thereby improving construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the longitudinal cross-sectional structure of the template of the foundation pit protection device with formwork provided in this embodiment in the expanded state; Figure 2 A schematic diagram of the top view of the structure of the formwork of the foundation pit protection device with formwork provided in this embodiment in the unfolded state; Figure 3 A schematic diagram of the top view of the template of the foundation pit protection device with formwork provided in this embodiment in the retracted state; Figure 4 This is a schematic diagram of the foundation pit formwork protection device provided in this embodiment when in use.

[0018] Icons: 100- foundation pit formwork protection device; 110- frame; 111- top beam; 112- bottom beam; 113- vertical beam; 114- second connecting seat; 115- first stopper; 116- lifting part; 120- protective cover; 130- formwork; 131- first connecting seat; 132- second stopper; 133- first formwork; 134- second formwork; 135- first inclined guide surface; 136- second inclined guide surface; 137- knocking protrusion; 140- connecting rod; 160- support screw; 170- lifting equipment. DETAILED DESCRIPTION

[0019] In mountainous areas with steep terrain, where large drilling equipment is inaccessible or drilling platforms are difficult to construct, bored pile construction is often used. Bored pile construction is typically carried out layer by layer, starting from top to bottom. Each layer is broadly divided into the following steps: excavation, reinforcement binding for the retaining wall, formwork installation, and pouring of retaining wall concrete.

[0020] In the existing technology, the repetitive cycle of template installation and removal is cumbersome. For large-diameter holes, internal supports need to be added to reinforce the wall template. The overall workload is large, time-consuming, and the fixed stability is poor. At the same time, the lifting in and out of the wall template and support increases the risk of falling, which in turn affects construction efficiency and safety.

[0021] In view of the above problems, the present invention provides a foundation pit formwork protection device, which can improve the efficiency and safety of the manual bored pile construction process.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0027] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0028] The overall structure, working principle and technical effects of the foundation pit formwork protection device provided by the present invention are described in detail below through embodiments and in conjunction with the accompanying drawings.

[0029] Please refer to Figures 1 to 4 This embodiment provides a foundation pit formwork protection device 100, which is used in manual bored pile construction when large drilling machinery cannot reach the site or when a drilling platform is difficult to build. It can improve the efficiency and safety of manual bored pile construction.

[0030] In this embodiment, the foundation pit formwork protection device 100 includes a frame 110, a protective cover 120, and a plurality of templates 130. All templates 130 are sequentially arranged on the outer periphery of the frame 110 along the circumference of the frame 110. All templates 130 are movable relative to the frame 110 to switch between an extended state and a retracted state. In the extended state, all templates 130 are assembled to form a cylindrical shape. In the retracted state, two adjacent templates 130 partially overlap in the circumferential direction. The protective cover 120 is arranged on the top of the frame 110.

[0031] In this embodiment, multiple templates 130 are arranged along the circumference of the frame 110 on its outer periphery. All templates 130 are movable relative to the frame 110 to switch between an extended and retracted state. In the extended state, all templates 130 are assembled to form a cylindrical shape. In the retracted state, two adjacent templates 130 partially overlap circumferentially, and a protective cover 120 is provided on top of the frame 110. During construction, construction workers can stand within the frame 110 while excavating, providing protection while the frame 110 and the extended templates 130 provide circumferential support for the upper layer of concrete being poured. After the next layer is excavated, the formwork 130 supported on the previous layer will be stored, so that the foundation pit formwork protection device 100 will fall as a whole to the excavated layer, and then the formwork 130 will be unfolded to set up the formwork 130 before pouring, thereby improving construction efficiency and the foundation pit formwork protection device 100 can shield the periphery and top of the construction environment during the construction process, thereby improving construction safety.

[0032] Please refer to Figures 1 to 4 In this embodiment, the protective cover 120 has a semicircular structure and includes a support frame and a steel mesh mounted on the support frame. The support frame is connected to the frame 110. The specific connection method can be a detachable threaded connection, a snap connection, etc., so that it can be easily separated from the frame 110 during transportation. The support frame can bear gravity, while the steel mesh can block falling objects and facilitate observation and ventilation.

[0033] In this embodiment, the frame 110 includes a top beam 111, a bottom beam 112, and a plurality of vertical beams 113. The vertical beams 113 are spaced apart between the top beam 111 and the bottom beam 112 and connected to both the top beam 111 and the bottom beam 112. The template 130 is connected to the vertical beams 113 via connecting rods 140.

[0034] In this embodiment, the frame 110 is configured as the above-mentioned structure, which makes it easier for construction workers to operate the formwork 130 through the gaps between the vertical beams 113. The formwork 130 is connected to the vertical beams 113 via the connecting rods 140, which makes it easier to deploy and retract the formwork 130. After the formwork 130 is deployed, the frame 110 can support the formwork 130, thereby avoiding the need to provide other supporting members. In this way, after the upper layer is poured, the construction workers can continue to dig the next layer within the frame 110. After the next layer is excavated, all the formwork 130 can be moved to the retracted state, and the foundation pit formwork protection device 100 can be lowered to the next layer for formwork support and pouring.

[0035] In this embodiment, both the top beam 111 and the bottom beam 112 are annular. To facilitate transportation, the top beam 111 and the bottom beam 112 can be split into multiple arc segments, which can be assembled using bolts. The specific number of arc segments can be determined based on the diameter and weight to ensure handling and transportation. The ends of the vertical beam 113 can also be detachably connected to the bottom beam 112 and the top beam 111 using threads, allowing for easy disassembly during transportation, thereby reducing the volume and weight of the unit and facilitating transportation.

[0036] In this embodiment, a first connection seat 131 is provided on the inner side of the template 130, and a second connection seat 114 is provided on the outer side of the vertical beam 113. One end of the connecting rod 140 is hinged to the first connection seat 131, and the other end of the connecting rod 140 is hinged to the second connection seat 114.

[0037] In this embodiment, the first connecting seat 131 and the second connecting seat 114 are provided to better realize the movable connection between the template 130 and the frame 110, so that the template 130 can be better deployed and retracted.

[0038] In this embodiment, two first connection seats 131 are spaced apart in the height direction of the template 130, and two second connection seats 114 are spaced apart in the height direction of the vertical beam 113. Each template 130 is connected to the two first connection seats 131 and the second connection seats 114 via two connecting rods 140.

[0039] In this embodiment, two first connecting seats 131 , two second connecting seats 114 and two connecting rods 140 are provided for connecting each template 130 , thereby improving the stability of the connection.

[0040] Please refer to Figures 1 to 4 In this embodiment, a first stop portion 115 is provided at the top of the second connecting seat 114, and a second stop portion 132 is provided at the bottom of the first connecting seat 131; when the template 130 is in the unfolded state, the side walls of the connecting rod 140 abut against the first stop portion 115 and the second stop portion 132 respectively.

[0041] In this embodiment, the first stopper 115 and the second stopper 132 can be positioned when the template 130 is in the unfolded state, thereby making it easier to unfold the template 130 .

[0042] It should be noted that both the first stop portion 115 and the second stop portion 132 are boss structures.

[0043] When changing from the retracted state to the deployed state, the template 130 is pushed outward, and the side of the connecting rod 140 hinged to the first connecting seat 131 rotates upward relative to the first connecting seat 131. At the same time, the side of the connecting rod 140 hinged to the second hinged seat rotates downward, and rotates until the two ends of the connecting rod 140 respectively abut against the first stop portion 115 and the second stop, thereby achieving full deployment and limiting.

[0044] When changing from the deployed state to the retracted state, the side of the connecting rod 140 hinged to the first connecting seat 131 is rotated downward relative to the first connecting seat 131 when the template 130 is pulled out, and the side of the connecting rod 140 hinged to the second hinge seat is rotated upward until the two ends of the connecting rod 140 respectively abut against the first stop 115 and the second stop, thereby achieving full deployment and position limiting. It should be noted that in order to facilitate the partial overlap of the circumferential direction of two adjacent templates 130 in the retracted state, some templates 130 can be pulled out in sequence, and then the other templates 130 can be pulled out. In this way, the template 130 pulled out first is the inner side, and the template 130 pulled out later will be stacked on the outer side of the template 130 pulled out first.

[0045] Please refer to Figures 1 to 4 In this embodiment, the end of the connecting rod 140 connected to the first connecting seat 131 is rotatably connected by a bolt. The end of the connecting rod 140 connected to the second connecting seat 114 is connected by a rivet, which can prevent the connecting rod 140 from being separated from the frame 110, thereby preventing it from being lost.

[0046] In this embodiment, the template 130 includes a plurality of first templates 133 and a plurality of second templates 134. The rounded angle corresponding to the outer circumference of the first template 133 is smaller than the central angle corresponding to the inner circumference of the first template 133, thereby forming first inclined guide surfaces 135 on both sides of the circumference of the first template 133. The rounded angle corresponding to the outer circumference of the second template 134 is larger than the central angle corresponding to the inner circumference of the second template 134, thereby forming second inclined guide surfaces 136 on both sides of the circumference of the second template 134. The first templates 133 and the second templates 134 are circumferentially spaced apart from each other on the outer periphery of the frame 110. In the deployed state, the first inclined guide surfaces 135 and the second inclined guide surfaces 136 of any adjacent first templates 133 and second templates 134 abut against each other. In the retracted state, the second template 134 of any adjacent first templates 133 and second templates 134 is radially stacked on the outside of the first template 133.

[0047] In this embodiment, the first inclined guide surface 135 and the second inclined guide surface 136 are provided to facilitate the first template 133 and the second template 134 to be assembled together to form a cylindrical shape in the expanded state. When the expanded state is changed to the retracted state, the first template 133 is pulled forward, and then the second template 134 is pulled out. The provision of the first inclined guide surface 135 and the second inclined guide surface 136 makes it easier to pull out the first template 133 first.

[0048] In this embodiment, the first inclined guide surfaces 135 formed on either side of the first mold plate 133 are inclined in opposite directions and at equal angles. The second inclined guide surfaces 136 formed on either side of the second mold plate 134 are inclined in opposite directions and at equal angles. This arrangement facilitates manufacturing.

[0049] Please refer to Figures 1 to 4 In this embodiment, the inclination angle A of the second inclined guide surface 136 is greater than the inclination angle B of the first inclined guide surface 135 .

[0050] When arranged in this way in the expanded state, the release area between the first inclined guide surface 135 and the second inclined guide surface 136 is small, and as the first template 133 is pulled outward, the gap between the first inclined guide surface 135 and the second inclined guide surface 136 will continue to increase, thereby making it easier to pull out the first template 133. When the first template 133 is pulled out to the retracted state, the second template 134 is easier to pull out.

[0051] In this embodiment, a knocking protrusion 137 is provided on the inner side of the first template 133. When retracting, the knocking protrusion 137 can be knocked downward to retract the first template 133 when it moves downward.

[0052] In this embodiment, the cylindrical shape formed by the first and second templates 133, 134 is tapered, with a larger diameter at the top and bottom. Furthermore, the central angle of the first template 133 in the circumferential direction can be minimized. During retraction, the first template 133 can be moved downward by tapping the tapping protrusion 137. This downward movement of the first template 133 also increases the gap between the first template 133 and the two second templates 134, making it easier to remove the first template 133 first.

[0053] Please refer to Figures 1 to 4 In this embodiment, the lifting type foundation pit protective device 100 further includes a plurality of support screws 160. All vertical beams 113 connected to the first formwork 133 are provided with threaded holes between the two second connection seats 114. The support screws 160 are disposed in the threaded holes. Rotating the support screws 160 can abut against the first formwork 133 and drive the first formwork 133 to unfold with the second formwork 134.

[0054] By rotating and extending the support screw 160, the first template 133 can be pushed out from the middle of the first template 133 and fixed in the expanded state, providing support for the first template 133 from the inside. The first template 133 can also support the second template 134, thereby maintaining the first and second templates 133 and 134 in the expanded state. When the first and second templates 133 and 134 need to be retracted, the support screw 160 is first rotated out, and then the knocking protrusion 137 of the first template 133 is struck to achieve better retraction.

[0055] In this embodiment, the foundation pit formwork protection device 100 further includes a lifting device 170. The lifting device 170 may be a gantry-type lifting device 170. The gantry-type lifting device 170 can lift excavated earth outward. A lifting portion 116 is provided at the top of the frame 110. The lifting rope of the lifting device 170 is connected to the lifting portion 116.

[0056] In this embodiment, a lifting unit 116 is provided at the top of the frame 110. The lifting rope of the lifting device 170 is connected to the lifting unit 116. This prevents the pit formwork protection device 100 from falling due to the excavation environment and concrete shrinkage when excavating the next layer. Furthermore, after the next layer is excavated and the rebar is laid, the pit formwork protection device 100 can be lowered to the next layer for support using the lifting device 170.

[0057] In summary, this embodiment arranges multiple templates 130 along the circumference of the frame 110 on the outer periphery of the frame 110, allowing all templates 130 to move relative to the frame 110 to switch between an extended state and a retracted state. In the extended state, all templates 130 are assembled to form a cylindrical shape. In the retracted state, two adjacent templates 130 partially overlap in the circumferential direction, and a protective cover 120 is provided on top of the frame 110. During construction, construction workers can stand within the frame 110 while excavating, thereby providing protection. At the same time, the frame 110 and the extended templates 130 can provide circumferential support for the upper layer of concrete for pouring retaining wall. After the next layer is excavated, the formwork 130 supported on the previous layer will be stored, so that the foundation pit formwork protection device 100 will fall as a whole to the excavated layer, and then the formwork 130 will be unfolded to set up the formwork 130 before pouring, thereby improving construction efficiency and the foundation pit formwork protection device 100 can shield the periphery and top of the construction environment during the construction process, thereby improving construction safety.

[0058] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or replacements that can be easily conceived by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A foundation pit formwork protection device, characterized in that: include: Frame (110); A plurality of templates (130), wherein the plurality of templates (130) are arranged on the outer periphery of the frame (110) along the circumference of the frame (110), and the plurality of templates (130) are movable relative to the frame (110) to switch between an expanded state and a retracted state; in the expanded state, all the templates (130) are assembled to form a cylindrical shape; in the retracted state, two adjacent templates (130) partially overlap in the circumferential direction; A protective cover plate (120), wherein the protective cover plate (120) is arranged on the top of the frame (110).

2. The foundation pit protection device with formwork according to claim 1 is characterized in that: The frame (110) includes a top beam (111), a bottom beam (112), and a plurality of vertical beams (113); The plurality of vertical beams (113) are arranged at intervals between the top beam (111) and the bottom beam (112), and are connected to both the top beam (111) and the bottom beam (112); The template (130) is connected to the vertical beam (113) via a connecting rod (140).

3. The foundation pit protection device with formwork according to claim 2, characterized in that: A first connecting seat (131) is provided on the inner side of the template (130), and a second connecting seat (114) is provided on the outer side of the vertical beam (113); One end of the connecting rod (140) is hinged to the first connecting seat (131), and the other end of the connecting rod (140) is hinged to the second connecting seat (114).

4. The foundation pit protection device with formwork according to claim 3 is characterized in that: Two first connecting seats (131) are provided at intervals in the height direction of the template (130), and two second connecting seats (114) are provided at intervals in the height direction of the vertical beam (113); Each template (130) is correspondingly connected to two first connecting seats (131) and the second connecting seat (114) via two connecting rods (140).

5. The foundation pit protection device with formwork according to claim 4 is characterized in that: A second stopper (132) is provided at the top of the first connecting seat (131), and a first stopper (115) is provided at the bottom of the second connecting seat (114); When the template (130) is in an expanded state, the side walls of the connecting rod (140) respectively abut against the first stop portion (115) and the second stop portion (132).

6. The foundation pit protection device with formwork according to any one of claims 3 to 5, characterized in that: The template (130) includes a plurality of first templates (133) and a plurality of second templates (134); The circular angle corresponding to the outer circumferential surface of the first template (133) is smaller than the central angle corresponding to the inner circumferential surface of the first template (133), so as to form first inclined guide surfaces (135) on both sides of the circumference of the first template (133); The circular angle corresponding to the outer circumference of the second template (134) is greater than the central angle corresponding to the inner circumference of the second template (134), so as to form second inclined guide surfaces (136) on both sides of the circumference of the second template (134); The first template (133) and the second template (134) are arranged at intervals on the outer periphery of the frame (110) in the circumferential direction; In the unfolded state, the first inclined guide surface (135) and the second inclined guide surface (136) of any adjacent first template (133) and second template (134) abut against each other; In the retracted state, the second template (134) of any adjacent first template (133) and second template (134) is stacked radially outside the first template (133).

7. The foundation pit protection device with formwork according to claim 6, characterized in that: The first inclined guide surfaces (135) formed on both sides of the first template (133) in the circumferential direction have opposite inclination directions and equal inclination angles; The second inclined guide surfaces (136) formed on both sides of the second template (134) in the circumferential direction have opposite inclination directions and equal inclination angles.

8. The foundation pit protection device with formwork according to claim 7, characterized in that: The inclination angle of the second inclined guide surface (136) is greater than that of the first inclined guide surface (135).

9. The foundation pit protection device with formwork according to claim 6, characterized in that: The foundation pit formwork protection device further includes a plurality of support screws (160); All the vertical beams (113) connected to the first template (133) are provided with threaded holes between the two second connection seats (114), and the support screws (160) are provided in the threaded holes. Rotating the support screws (160) can abut against the first template (133) and drive the first template (133) to unfold with the second template (134).

10. The foundation pit protection device with formwork according to any one of claims 1 to 5, characterized in that: The foundation pit formwork protection device also includes a lifting device (170); A lifting portion (116) is provided on the top of the frame (110); The lifting rope of the lifting device (170) is connected to the lifting part (116).

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