Foundation pit self-adaptive supporting structure based on bag grouting technology

Abstract

The invention discloses a self-adaptive foundation pit supporting structure based on a bag grouting process, and relates to the technical field of foundation pit supporting, the self-adaptive foundation pit supporting structure comprises a connecting assembly connected with the joint of a steel sheet pile, and the connecting assembly comprises a mounting rod and a movable plate movably mounted on the mounting rod; hooks matched with locking openings in the two sides of the steel sheet pile are arranged at the ends of the movable plate. The mounting rod of the connecting assembly is inserted into the corner through a pile driver, the hooks on the two movable plates are connected with the locking openings in the corresponding steel sheet piles correspondingly, the locking openings push the hooks and the movable plates to move in the circumferential direction relative to the mounting rod, the orientations of the movable plates are finely adjusted, and the movable plates are parallel to the corresponding steel sheet piles; the movable plates move in the radial direction relative to the mounting rod, the hooks are embedded into the locking openings in the steel sheet piles, gaps between the movable plates and the corresponding steel sheet piles are sealed, the two movable plates are attached to each other and support each other, the rigidity of the corner is improved, and the gaps between the two movable plates are sealed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation pit support, in particular to a self-adaptive foundation pit support structure based on a bag grouting process. BACKGROUND

[0002] It is known that bag grouting is a grouting process commonly used for foundation pit reinforcement, which controls the grouting position through a bag and sends slurry (cement clay slurry) to the relatively loose soil beside the foundation pit to reinforce the soil. Moreover, bag grouting is often used in cooperation with steel sheet piles, which form a continuous wall through lock connection. Bag grouting can seal potential and existing leakage points of the lock of the steel sheet pile, greatly improving the waterproof reliability of the foundation pit.

[0003] For example, an invention patent with the name of "Steel sheet pile support system for box culvert foundation pit" with the application publication number CN115369887B and the application publication date of June 2, 2023, includes a plurality of steel sheet piles, the steel sheet piles are connected to each other to form a steel sheet pile wall, the steel sheet pile wall is arranged along the periphery of the box culvert foundation pit for construction, and further includes a plurality of main support columns and a plurality of auxiliary support columns arranged in the box culvert foundation pit for construction, the plurality of main support columns and the plurality of auxiliary support columns are arranged against the steel sheet pile wall, the plurality of auxiliary support columns are arranged between the adjacent two main support columns, and further includes a pushing mechanism and an inclined support mechanism, the pushing mechanism is used for pushing and supporting the steel sheet pile wall, each auxiliary support column is provided with an inclined support mechanism on the side away from the steel sheet pile wall, and the inclined support mechanism is used for supporting the auxiliary support column and the steel sheet pile wall. The present application has the effect of reducing the possibility of damage to the steel sheet pile under the extrusion of soil, water and the like outside the box culvert foundation pit.

[0004] The deficiency of the prior art is that the steel sheet piles are embedded with the locks on the adjacent steel sheet piles when connected to form a continuous wall to stabilize the soil around the foundation pit. However, the locks of the steel sheet piles located at the corners of the foundation pit are not in the same plane and cannot be directly embedded. Instead, the steel sheet piles of one wall continue to be set at the corners and beyond the steel sheet piles of the other wall, and the steel sheet piles of the other wall are connected to the "overlapping piles" through the locks. However, the lock connection at the corner of the steel sheet piles connected in this way is not completely rigid, the rigidity at the corner is weakened, and there are many locks at the overlapping part, which has a high risk of leakage. SUMMARY

[0005] The purpose of the present application is to provide a self-adaptive foundation pit support structure based on a bag grouting process to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a foundation pit self-adaptive supporting structure based on a bag grouting process, comprising a connecting assembly connected to a connecting portion of a steel sheet pile, the connecting assembly comprising a mounting rod and a movable plate movably mounted on the mounting rod, an end portion of the movable plate being provided with a hook adapted to a lock on both sides of the steel sheet pile, the movable plate being axially moved relative to the mounting rod so that the hook thereon is connected to the corresponding lock, and the movable plate being radially moved relative to the mounting rod so that the hook thereon is embedded in the corresponding lock.

[0007] As a further description of the above technical scheme: a cylindrical portion is arranged on a side wall inside the mounting rod.

[0008] As a further description of the above technical scheme: an arc-shaped movable block corresponding to the movable plate is slidably arranged inside the mounting rod.

[0009] As a further description of the above technical scheme: a guide groove is formed in the movable block for guiding the movable plate to be radially moved relative to the mounting rod.

[0010] As a further description of the above technical scheme: an inner push block is arranged on an inner side wall of the hook, and an outer push block is arranged on an outer side wall of the hook.

[0011] As a further description of the above technical scheme: the outer push block and the inner push block are respectively arranged at upper and lower ends of the hook.

[0012] As a further description of the above technical scheme: the height of the movable plate is greater than the length of the steel sheet pile, and the length of the inner push block is less than the height difference between the movable plate and the steel sheet pile.

[0013] As a further description of the above technical scheme: a plurality of interleaved insertion plates are arranged on the cylindrical portions of two movable plates, and a plurality of insertion grooves adapted to the insertion plates are formed in an inner wall of the mounting rod.

[0014] As a further description of the above technical scheme: a plurality of continuous planes are formed in the mounting rod, the insertion grooves being arranged in the middle of the planes and both sides of the planes being provided with guide slopes.

[0015] As a further description of the above technical scheme: the insertion plates are tangent to the corresponding cylindrical portions, and the insertion plates on the two movable plates are oppositely distributed.

[0016] In the technical scheme, the self-adaptive supporting structure of foundation pit based on the bag grouting process has the following beneficial effects: when the installation work of the steel sheet pile is performed, the steel sheet piles on both sides of the corner are first inserted to the outside of the foundation pit, then the installation rod of the connecting assembly is inserted to the corner by the pile driver, the worker pushes the movable plate to move circumferentially relative to the installation rod, the hooks on the two movable plates are roughly aligned with the lock ports on the steel sheet piles, the pile driver continuously pushes the installation rod to insert downward, the hooks on the two movable plates are connected with the lock ports on the corresponding steel sheet piles respectively, the lock ports push the hooks and the movable plates to move circumferentially relative to the installation rod, the orientation of the movable plate is adjusted, the movable plate is parallel to the corresponding steel sheet pile, after the installation rod is inserted to the appropriate depth, the movable plate moves radially relative to the installation rod, the hooks on the movable plate are embedded with the lock ports on the steel sheet piles, the gap between the movable plate and the corresponding steel sheet pile is sealed, and the two movable plates are attached to each other on one side of the installation rod and support each other, the rigidity of the corner is improved, the gap between the two movable plates is sealed, and leakage is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0018] Figure 1 The general structure schematic diagram provided for the embodiments of the present application; Figure 2 The top structure schematic diagram provided for the embodiments of the present application; Figure 3 The Figure 2 enlarged view of A in FIG. 4; Figure 4 The structure schematic diagram of the connecting assembly provided for the embodiments of the present application; Figure 5 The Figure 4 enlarged view of B in FIG. 5; Figure 6 The internal structure schematic diagram of the installation rod provided for the embodiments of the present application; Figure 7 The structure schematic diagram of the movable plate provided for the embodiments of the present application; Figure 8 The Figure 7 enlarged view of C in FIG. 6; Figure 9 The structure schematic diagram of the movable block provided for the embodiments of the present application; Figure 10 The Figure 9 enlarged view of D in FIG. 7.

[0019] Marked with a figure: 1, connecting assembly; 11, mounting rod; 111, movable block; 112, guide groove; 113, insertion slot; 114, guide slope; 12, movable plate; 121, hook; 122, cylindrical part; 123, synchronization block; 124, insertion plate; 125, inner push block; 126, outer push block; 2, steel sheet pile. DETAILED DESCRIPTION

[0020] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0021] Please refer to Figures 1-10 The present application provides a technical solution: a foundation pit self-adaptive supporting structure based on the bag grouting process, which comprises a connecting assembly 1 connected at the connection of the steel sheet pile 2, the connecting assembly 1 comprising a mounting rod 11 and a movable plate 12 movably mounted on the mounting rod 11, the end of the movable plate 12 being provided with a hook 121 adapted to the lock on both sides of the steel sheet pile 2, the movable plate 12 being axially moved relative to the mounting rod 11 so that the hook 121 thereon is connected with the corresponding lock, and the movable plate 12 being radially moved relative to the mounting rod 11 so that the hook 121 thereon is embedded with the corresponding lock.

[0022] Specifically, the bottom of the mounting rod 11 is provided with a conical part for easy insertion, and the two movable plates 12 on the mounting rod 11 correspond to the steel sheet piles 2 on both sides of the corner.

[0023] Further, when installing the steel sheet pile 2, first insert the steel sheet piles 2 on both sides of the corner outside the foundation pit, then insert the mounting rod 11 of the connecting assembly 1 into the corner by the pile driver, and the worker pushes the movable plate 12 to move circumferentially relative to the mounting rod 11, so that the hooks 121 on the two movable plates 12 are roughly aligned with the locks on the steel sheet piles 2, the pile driver continues to push the mounting rod 11 to insert downward, the hooks 121 on the two movable plates 12 are connected with the locks on the corresponding steel sheet piles 2 respectively, and the locks push the hooks 121 and the movable plate 12 to move circumferentially relative to the mounting rod 11, the orientation of the movable plate 12 is adjusted slightly, so that the movable plate 12 is parallel to the corresponding steel sheet pile 2, after the mounting rod 11 is inserted to the appropriate depth, the movable plate 12 is radially moved relative to the mounting rod 11, the hook 121 on the movable plate 12 is embedded with the lock on the steel sheet pile 2, the gap between the movable plate 12 and the corresponding steel sheet pile 2 is sealed, and the two movable plates 12 are attached to each other on one side inside the mounting rod 11 and support each other, which improves the rigidity of the corner and seals the gap between the two movable plates 12, reducing leakage, and then the soil outside the steel sheet pile is subjected to bag grouting, and cement clay slurry is injected to improve the stability of the soil and reduce the possibility of foundation pit landslide.

[0024] Further, a handle for facilitating the piling machine to grip can be installed on the top of the mounting rod 11 in the above-mentioned embodiments, so as to connect the mounting and removal of the assembly 1.

[0025] In still another embodiment of the present application, a cylindrical portion 122 is arranged on the side wall of the movable plate 12 inside the mounting rod 11.

[0026] Specifically, the cylindrical portion 122 is arranged on the side wall of the movable plate 12 opposite to the hook 121.

[0027] Further, the movable plate 12 always points to the axis of the mounting rod 11 during the circumferential movement relative to the mounting rod 11, and when the movable plate 12 is parallel to the corresponding steel sheet pile 2, the two movable plates 12 move radially relative to the mounting rod 11, the two movable plates 12 are close to the axis of the mounting rod 11, and the two cylindrical portions 122 on the two movable plates 12 are close to each other, no matter how many degrees the included angle between the two movable plates 12 is, the two cylindrical portions 122 can be close to each other, and the distance of the radial movement of the movable plate 12 is the same.

[0028] In still another embodiment of the present application, an arc-shaped movable block 111 corresponding to the movable plate 12 is arranged to slide inside the mounting rod 11, and a guide groove 112 for guiding the radial movement of the movable plate 12 relative to the mounting rod 11 is arranged on the movable block 111.

[0029] Specifically, the movable block 111 is slidably arranged on the annular track inside the mounting rod 11, the guide groove 112 on the movable block 111 always points to the axis of the mounting rod 11, and a square-shaped synchronous block 123 adapted to the guide groove 112 is arranged below the cylindrical portion 122, and the guide groove 112 cooperates with the synchronous block 123 to make the movable plate 12 always point to the axis of the mounting rod 11.

[0030] Further, during the process of inserting the mounting rod 11 into the corner of the steel sheet pile 2, the synchronous block 123 on the movable plate 12 is at the innermost side of the guide groove 112, and the distance between the hook 121 and the mounting rod 11 is the largest, at this time, the movable plate 12 can drive the movable block 111 to move through the synchronous block 123, the arc-shaped movable block 111 moves along the annular track inside the mounting rod 11, the movable plate 12 moves circumferentially relative to the mounting rod 11, after the mounting rod 11 is mounted in place, the synchronous block 123 cooperates with the guide groove 112 to make the movable plate 12 always point to the axis of the mounting rod 11, the synchronous block 123 moves along the guide groove 112, the movable plate 12 moves radially relative to the mounting rod 11, the cylindrical portion 122 moves to the inside of the mounting rod 11, the hook 121 is embedded in the lock opening on the steel sheet pile 2, the cylindrical portions 122 on the two movable plates 12 are close to each other, and the gap between the two movable plates 12 is sealed, thereby blocking the leakage.

[0031] In still another embodiment of the present application, the inner side wall of the hook 121 is provided with an inner push block 125, the outer side wall of the hook 121 is provided with an outer push block 126, the outer push block 126 and the inner push block 125 are respectively located at the upper and lower ends of the hook 121, the height of the movable plate 12 is greater than the length of the steel sheet pile 2, the length of the inner push block 125 is less than the height difference between the movable plate 12 and the steel sheet pile 2, and only one of the inner push block 125 and the outer push block 126 can be in contact with the corresponding steel sheet pile 2 at the same time.

[0032] Specifically, the top and bottom of the inner push block 125 are provided with slopes, and the bottom of the outer push block 126 is provided with a slope.

[0033] Further, when the installation work of the steel sheet pile 2 is performed, the steel sheet piles 2 on both sides of the corner are first inserted outside the foundation pit, and then the installation rod 11 of the connecting assembly 1 is inserted into the corner by the pile driver, the staff pushes the movable plate 12 to move circumferentially relative to the installation rod 11, the hooks 121 on the two movable plates 12 are roughly aligned with the lock ports on the steel sheet piles 2, the installation rod 11 is continuously pushed downward by the pile driver, the hooks 121 on the two movable plates 12 are respectively connected with the lock ports on the corresponding steel sheet piles 2, the inner push block 125 on the inner side wall of the hook 121 is embedded with the lock port on the steel sheet pile 2, the lock port moves along the slope below the inner push block 125, so that the hook 121 moves radially relative to the installation rod 11, the synchronous block 123 on the movable plate 12 moves to the innermost side of the guide groove 112, the lock port pushes the inner push block 125, so that the hook 121 and the movable plate 12 move circumferentially relative to the installation rod 11, the orientation of the movable plate 12 is adjusted, so that the movable plate 12 is parallel to the corresponding steel sheet pile 2, after the installation rod 11 is inserted to the appropriate depth, the inner push block 125 at the lower end of the hook 121 is separated from the lock port on the steel sheet pile 2, the outer push block 126 at the upper end of the hook 121 gradually inserts into the lock port and pushes the hook 121 and the movable plate 12 to move radially relative to the installation rod 11, the hook 121 moves along the arc surface inside the lock port and gradually embeds, so as to seal the gap between the movable plate 12 and the corresponding steel sheet pile 2 and block the leakage, the cylindrical portions 122 of the two movable plates 12 are attached to each other inside the installation rod 11 and support each other, so as to improve the rigidity of the corner and seal the gap between the two movable plates 12 and reduce the leakage; when the connecting assembly 1 is pulled out, the steel sheet pile 2.

[0034] In still another embodiment of the present application, the cylindrical portions 122 of the two movable plates 12 are provided with staggered distribution of the insertion plates 124, and the inner wall of the installation rod 11 is provided with a plurality of insertion grooves 113 matched with the insertion plates 124.

[0035] Specifically, the plurality of insertion grooves 113 inside the installation rod 11 correspond to common angles (such as 60°, 90°, 120°, …) of the corners of the steel sheet pile 2.

[0036] Further, when connecting the corners of the steel sheet piles 2 at a common angle, first, the steel sheet piles 2 on both sides of the corner are installed at the corresponding positions, then the mounting rod 11 of the connecting assembly 1 is inserted into the corner by the pile driver, the workers push the movable plates 12 to move circumferentially relative to the mounting rod 11, and the angles of rotation of the two movable plates 12 relative to the mounting rod 11 are substantially the same, the pile driver continues to push the mounting rod 11 and the movable plates 12 to insert downward, then the movable plates 12 move radially relative to the mounting rod 11, the cylindrical portions 122 of the two movable plates 12 are close to each other and the insertion plates 124 are inserted into the corresponding insertion grooves 113, the insertion plates 124 are connected with the mounting rod 11 through the insertion grooves 113, thereby connecting the movable plates 12 with the mounting rod 11, and further improving the rigidity at the corner.

[0037] In still another embodiment of the present application, a plurality of continuous planes are formed in the interior of the mounting rod 11, and the insertion grooves 113 are located in the middle of the planes and provided with guide slopes 114 on both sides.

[0038] Specifically, the plurality of continuous planes correspond to the common angle of the corner of the steel sheet pile 2.

[0039] Further, when connecting the corners of the steel sheet piles 2 at a common angle, first, the steel sheet piles 2 on both sides of the corner are installed at the corresponding positions, then the mounting rod 11 of the connecting assembly 1 is inserted into the corner by the pile driver, the workers push the movable plates 12 to move circumferentially relative to the mounting rod 11, and the angles of rotation of the two movable plates 12 relative to the mounting rod 11 are substantially the same, the movable plates 12 on the movable plates 12 are opposite to the corresponding planes, the pile driver continues to push the mounting rod 11 and the movable plates 12 to insert downward, then the movable plates 12 move radially relative to the mounting rod 11, the cylindrical portions 122 of the two movable plates 12 are close to each other and the insertion plates 124 are inserted into the corresponding planes, thereby connecting the movable plates 12 with the mounting rod 11, and further improving the rigidity at the corner.

[0040] In still another embodiment of the present application, the insertion plates 124 are tangent to the corresponding cylindrical portions 122, and the insertion plates 124 on the two movable plates 12 are distributed opposite to each other.

[0041] Specifically, the plug plates 124 on the two movable plates 12 are respectively located on different side walls of the two movable plates 12, and the cylindrical portions 122 are provided with notches for facilitating the plug plates 124 to pass through, which can ensure the overall roundness of the cylindrical portions 122 and facilitate the staggered insertion of the plug plates 124 into the plug slots 113 inside the mounting rod 11, thereby strengthening the connection between the mounting rod 11 and the movable plates 12, improving the rigidity of the corner of the steel sheet pile 2, and facilitating the abutment of the two cylindrical portions 122, thereby sealing the gap between the two movable plates 12.

[0042] The foregoing merely describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. An adaptive support structure for foundation pits based on bag grouting technology, characterized in that, The connection assembly (1) includes a connecting component (1) for connecting the sheet pile (2). The connecting component (1) includes an installation rod (11) and a movable plate (12) movably mounted on the installation rod (11). The end of the movable plate (12) is provided with a hook (121) that is adapted to the locking ports on both sides of the sheet pile (2). The movable plate (12) moves axially relative to the installation rod (11) so that the hook (121) on it connects with the corresponding locking port. The movable plate (12) moves radially relative to the installation rod (11) so that the hook (121) on it engages with the corresponding locking port.

2. The adaptive support structure for foundation pits based on bag grouting technology according to claim 1, characterized in that, The movable plate (12) has a cylindrical part (122) on the side wall inside the mounting rod (11).

3. The adaptive support structure for foundation pits based on bag grouting technology according to claim 1, characterized in that, The mounting rod (11) has an arc-shaped movable block (111) that corresponds to the movable plate (12) and is slidably disposed inside it.

4. The adaptive support structure for foundation pits based on bag grouting technology according to claim 3, characterized in that, The movable block (111) is provided with a guide groove (112) for guiding the movable plate (12) to move radially relative to the mounting rod (11).

5. The self-adaptive support structure for foundation pits based on bag grouting technology according to claim 1, characterized in that, An inner push block (125) is provided on the inner side wall of the hook (121), and an outer push block (126) is provided on the outer side wall of the hook (121).

6. The adaptive support structure for foundation pits based on bag grouting technology according to claim 5, characterized in that, The outward push block (126) and the inward push block (125) are located at the upper and lower ends of the hook (121), respectively.

7. The self-adaptive support structure for foundation pits based on bag grouting technology according to claim 5, characterized in that, The height of the movable plate (12) is greater than the length of the sheet pile (2), and the length of the push block (125) is less than the height difference between the movable plate (12) and the sheet pile (2).

8. The self-adaptive support structure for foundation pits based on bag grouting technology according to claim 2, characterized in that, The cylindrical portions (122) of the two movable plates (12) are provided with staggered insert plates (124), and the inner wall of the mounting rod (11) is provided with a plurality of slots (113) that are adapted to the insert plates (124).

9. The self-adaptive support structure for foundation pits based on bag grouting technology according to claim 8, characterized in that, The mounting rod (11) has multiple continuous planes inside, and the slot (113) is located in the middle of the plane and has guide slopes (114) on both sides.

10. The self-adaptive support structure for foundation pits based on bag grouting technology according to claim 8, characterized in that, The insert plate (124) is tangent to the corresponding cylindrical part (122) and the insert plates (124) on the two movable plates (12) are distributed opposite to each other.

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