Filler for reducing deformation quantity of supporting structure of ultra-deep foundation pit

Abstract

The invention relates to the technical field of foundation pit supporting structures, in particular to a filler for reducing deformation of an ultra-deep foundation pit supporting structure. Comprising a first filling part and a second filling part, the first filling part comprises a first filler and a first connecting part, the first filler is perpendicular to a supporting wall face for filling, the first connecting part comprises a plurality of vertically-arranged threaded anchor rods, the lower ends of the threaded anchor rods stretch into the first filler, and the first connecting part is connected with the first filler. The second filling part comprises a second filler and a second connecting part, the lower portion of the supporting wall face is horizontally filled with the second filler, the second connecting part is connected to the second filler and the bottom of the foundation pit, the second connecting part is provided with a supporting assembly, and a filling pipe is connected between the supporting assembly and the first filler; the first filling pipe is used for the first filler and supporting the first filling part, and the rigidity and lateral deformation resistance of the supporting structure are effectively enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit supporting structures, in particular to a filler for reducing the deformation of an ultra-deep foundation pit supporting structure. Background Art

[0002] In civil engineering fields such as deep foundation pits and slope support, the stability of support structures (such as retaining walls and retaining pile walls) is crucial. Under the influence of earth pressure, water pressure, and external loads, support structures inevitably undergo certain deformations (such as lateral displacement and settlement). Excessive deformation not only affects construction safety but can also endanger the safety of adjacent buildings and underground pipelines, and even cause the support structure to fail.

[0003] While traditional support structure reinforcement methods, such as increasing the thickness of the support structure and adding internal supports or anchors, can control deformation to a certain extent, they still have some limitations: Traditional methods often treat the support structure as a whole for reinforcement. Once a local area becomes unstable or experiences significant deformation due to uneven soil quality, overloading, or groundwater action, it can easily trigger a chain reaction, leading to larger-scale collapse or damage. At the same time, there is a lack of effective and intuitive real-time monitoring methods for the development of deformation in key parts of the support structure (especially the lower part), making it difficult to provide timely warnings and take intervention measures. Therefore, there is an urgent need to develop a new type of filler and support structure reinforcement system that can more effectively reduce the deformation of the support structure, especially one that can achieve zoning control, active support, and real-time monitoring. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a filler for reducing the deformation of an ultra-deep foundation pit support structure.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a filler for reducing the deformation of an ultra-deep foundation pit support structure, comprising a first filling part and a second filling part, the first filling part comprising a first filler and a first connecting part, the first filler is filled perpendicularly to the supporting wall surface, the first connecting part comprises a plurality of vertically arranged threaded anchor rods, the lower ends of the threaded anchor rods extend into the interior of the first filler, the second filling part comprises a second filler and a second connecting part, the second filler is horizontally filled in the lower part of the supporting wall surface, the second connecting part is connected to the second filler and the bottom of the foundation pit, the second connecting part is provided with a support assembly, a filling pipe is connected between the support assembly and the first filler, the first filling pipe is used for the first filler and to support the first filling part.

[0006] As an optimization, the threaded anchor rods connected to the same first filler are grouped together, and a support portion is provided between two adjacent groups of threaded anchor rods; The supporting part includes a pull plate, a connecting plate and a support frame. One end of the pull plate is connected to a threaded anchor rod away from the supporting wall. The other end of the pull rod extends to the front side of the supporting wall and is connected to the connecting plate. The connecting plate is fixedly connected to two adjacent pull plates. One end of the support frame is fixed to the connecting plate, and the other end is tilted downward and supported on the bottom surface of the foundation pit.

[0007] As an optimization, a tubular first filling cavity is opened at the lower part of the supporting wall surface, and the first filling cavity is used to accommodate a first filler.

[0008] As an optimization, the lower portion of the supporting wall is recessed to form a second filling cavity arranged along the length direction, and the second filling cavity is used to accommodate a second filler, and the length direction of the second filler is perpendicular to the length direction of the first filler.

[0009] As an optimization, the upper end of the threaded anchor rod is provided with a fastening nut, which is in contact with and tightly pressed against the top of the slope to be supported; Several groups of threaded anchor rods and first fillers separate the slope to be supported into several reinforcement areas, so that the lower parts of adjacent reinforcement areas are supported by different support components. When one reinforcement area collapses, the impact on the adjacent reinforcement areas is reduced.

[0010] As an optimization, the support assembly includes an L-shaped support plate and two jacks, the vertical portion of the L-shaped support plate contacts the supporting wall surface, the horizontal portion of the L-shaped support plate contacts the bottom surface of the foundation pit, and the L-shaped support plate is connected to the second filler by a plurality of expansion bolts; The jack is vertically connected to the filling pipe, and the bottom of the jack is fixed to the horizontal part of the L-shaped support plate.

[0011] As an optimization, the support end of the jack is detachably connected to a support block, the support block is connected to the filling tube, and the support end is equipped with a detection component for detecting the relative displacement between the filling tube and the support end.

[0012] As an optimization, the detection assembly includes a detection wheel arranged along the length direction of the filling tube, and a receiving groove is opened at the lower part of the support block, the receiving groove is used to accommodate the support end, and the circumferential surface of the detection wheel contacts the support block; The length direction of the receiving groove is arranged along the axis of the filling tube, the end of the receiving groove away from the supporting wall is sealed, and the end of the receiving groove in contact with the supporting wall is open.

[0013] As an optimization, the first filler and the second filler are made of concrete.

[0014] The beneficial effects of this program are as follows: The first filler, placed perpendicular to the retaining wall surface and the vertical threaded anchors inserted into it, effectively enhances the rigidity and lateral deformation resistance of the retaining structure. The second filler, placed horizontally below the retaining wall surface and firmly connected to the bottom of the foundation pit, significantly enhances the stability of the lower portion of the retaining structure, counteracting the risk of loosening of the bottom soil and "kick-off" instability of the retaining structure caused by pit excavation. The combination of vertical and horizontal fillers forms a three-dimensional reinforcement system. Multiple groups of threaded anchors and primary fillers divide the slope to be supported into multiple independent "reinforced zones." The lower portion of each reinforced zone is supported by an independent support assembly. When a reinforced zone collapses or deforms excessively due to special reasons (such as local overload or soil loss), the independent support below it and the physical separation of adjacent zones by fillers and anchor groups effectively prevent the spread of damage, greatly reducing the risk of the accident escalating into overall instability and improving project safety. The detection component configured at the support end can monitor the relative displacement between the jack support end and the filling pipe in real time, facilitating timely monitoring of the deformation of the support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an axial side schematic diagram of the present invention.

[0016] Figure 2 It is a main schematic diagram of the present invention.

[0017] Figure 3 It is a left side schematic diagram of the present invention.

[0018] Figure 4 For the present invention Figure 3 AA cross-section structure diagram.

[0019] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of part B.

[0020] Among them, 1. first filler, 2. threaded anchor rod, 3. second filler, 4. filling tube, 5. pull plate, 6. connecting plate, 7. support frame, 8. fastening nut, 9. reinforcement area, 10. L-shaped support plate, 11. jack, 12. support block, 13. detection wheel. DETAILED DESCRIPTION

[0021] like Figure 1-Figure 5As shown, a filler for reducing the deformation of an ultra-deep foundation pit support structure includes a first filling part and a second filling part. The first filling part includes a first filler 1 and a first connecting part. The first filler 1 is filled perpendicular to the supporting wall surface. The first connecting part includes a plurality of vertically arranged threaded anchor rods 2. The lower ends of the threaded anchor rods 2 extend into the first filler 1. The second filling part includes a second filler 3 and a second connecting part. The second filler 3 is horizontally filled in the lower part of the supporting wall surface. The second connecting part is connected to the second filler 3 and the bottom of the foundation pit. The second connecting part is provided with a supporting assembly. A filling pipe 4 is connected between the supporting assembly and the first filler 1. The first filling pipe 4 is used to support the first filler 1 and the first filling part.

[0022] The first filler 1 and the second filler 3 are made of concrete.

[0023] The first filler 1 is made of C30 fine stone concrete and is filled in the pre-excavated tubular first filling cavity of the supporting wall. Before filling, the lower end of the threaded anchor rod 2 is extended into the first filling cavity so that the threaded anchor rod 2 and the first filler 1 are solidified and connected to form a stable connection structure.

[0024] The first filling part and the second filling part are arranged vertically to form a three-dimensional reinforcement system in the X direction (support component and second filler 3), Y direction (filling tube 4 and first filler 1) and Z direction (threaded anchor rod 2), thereby improving the reinforcement effect.

[0025] like Figure 1 and Figure 4 As shown, the threaded anchor rods 2 connected to the same first filler 1 are grouped together, and a support portion is provided between two adjacent groups of threaded anchor rods 2; The supporting part includes a pull plate 5, a connecting plate 6 and a support frame 7. One end of the pull plate 5 is connected to the threaded anchor rod 2 away from the supporting wall surface. The other end of the pull rod extends to the front side of the supporting wall surface and is connected to the connecting plate 6. The connecting plate 6 is fixedly connected to two adjacent pull plates 5. One end of the support frame 7 is fixed to the connecting plate 6, and the other end is tilted downward and supported on the bottom surface of the foundation pit.

[0026] Each group is equipped with at least 4 HRB400 grade threaded steel anchor rods, which are vertically inserted into the unsolidified concrete. A hook can be provided at the lower end of the anchor rod to enhance the pull-out resistance. The top of the anchor rod is locked with the slope top by a fastening nut 8.

[0027] The upper part of the slope protection is tightened by the pull plate 5, and the slope protection is supported by the support frame 7, so that the multiple threaded anchor rods 2 form a vertical reinforcement support surface, further ensuring the support effect.

[0028] A support plate may be provided at the lower end of the support frame 7 to improve the stability of the support frame 7 .

[0029] like Figure 4 As shown, a tubular first filling cavity is opened at the lower part of the supporting wall, and the first filling cavity is used to accommodate a first filler 1.

[0030] The first filling cavity is arranged horizontally, and the front end of the first filling cavity opens at the lower part of the supporting wall surface. The diameter of the first filling cavity is not less than 3 times the diameter of the filling tube 4.

[0031] like Figure 4 As shown, the lower portion of the supporting wall is recessed to form a second filling cavity arranged along the length direction. The second filling cavity is used to accommodate a second filler 3 , and the length direction of the second filler 3 is perpendicular to the length direction of the first filler 1 .

[0032] The second filler 3 can be made of C35 early-strength concrete and horizontally filled in the second filling cavity at the lower part of the supporting wall. The second filling cavity can be a V-shaped cavity opening outward.

[0033] like Figure 1 and Figure 3 As shown, the upper end of the threaded anchor rod 2 is provided with a fastening nut 8, which is in contact with and tightly pressed against the top of the slope to be supported; Several groups of threaded anchor rods 2 and first fillers 1 separate the slope to be supported into several reinforced areas 9, so that the lower parts of adjacent reinforced areas 9 are supported by different support components. When one of the reinforced areas 9 collapses, the impact on the adjacent reinforced areas 9 is reduced.

[0034] Every two groups of threaded anchor rods 2 define a reinforcement zone 9 .

[0035] like Figure 1 and Figure 4 As shown, the support assembly includes an L-shaped support plate 10 and two jacks 11. The vertical portion of the L-shaped support plate 10 contacts the supporting wall surface, and the horizontal portion of the L-shaped support plate 10 contacts the bottom surface of the foundation pit. The L-shaped support plate 10 is connected to the second filler 3 by a number of expansion bolts. The jack 11 is vertically connected to the filling pipe 4 , and the bottom of the jack 11 is fixed to the horizontal part of the L-shaped support plate 10 .

[0036] A 100t hydraulic jack 11 is selected and connected to the first filler 1 through the filling pipe 4. The bottom of the jack 11 is welded or fixed to the horizontal part of the L-shaped support plate 10 by bolts, and the top is tightened against the filling pipe 4 through the support block 12.

[0037] The L-shaped support plate 10 can be welded from Q345 steel plates and connected to the second filler 3 via M20 expansion bolts. Anti-slip ribs are provided at the bottom of the horizontal plate and embedded in the bottom surface of the foundation pit to suppress horizontal displacement.

[0038] like Figure 4 and Figure 5 As shown, the support end of the jack 11 is detachably connected to a support block 12, and the support block 12 is connected to the filling tube 4. The support end is equipped with a detection component for detecting the relative displacement between the filling tube and the support end.

[0039] like Figure 4 and Figure 5 As shown, the detection assembly includes a detection wheel 13 arranged along the length direction of the filling tube 4, and a receiving groove is opened at the lower part of the support block 12. The receiving groove is used to accommodate the support end, and the circumferential surface of the detection wheel 13 contacts the support block 12; The length direction of the receiving groove is arranged along the axis of the filling tube 4. The end of the receiving groove away from the supporting wall is sealed, and the end of the receiving groove in contact with the supporting wall is open.

[0040] The detection wheel 13 is installed in the receiving groove at the bottom of the support block 12, with the wheel rim in contact with the surface of the support block 12. The axis of the detection wheel 13 can be equipped with an angle sensor or a Hall sensor to detect the relative displacement between the support block 12 and the supporting end of the jack 11. At the same time, the present application can also be provided with an audible and visual alarm, which can sound an alarm when the detection wheel 13 detects relative displacement.

[0041] Directions: During actual use, a first filling cavity is opened every 3-10m along the slope to be supported, and a threaded anchor rod 2 is implanted at the top of the slope to be supported and then concrete is poured; A second filling cavity is excavated at the lower part of the supporting wall. The second filling cavity is located below the first filling cavity. Concrete is filled in the second filling cavity. After the second filling material 3 hardens, an L-shaped support plate 10 is installed and a jack 11 is connected to the filling pipe 4. Install the pull plate 5 and the connecting plate 6, and tighten the connecting plate 6 with the support frame 7 to form an oblique support; The displacement of the filling pipe 4 is detected by the detection wheel 13, and the pressure of the jack 11 is dynamically adjusted to ensure the support effect; A certain displacement threshold is set by the controller. When the detection wheel 13 detects that the relative displacement between the filling tube 4 and the support block 12 is greater than the displacement threshold, an alarm is sounded through the sound and light alarm.

[0042] The above-mentioned specific embodiments are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific embodiments. Any filler that reduces the deformation of the ultra-deep foundation pit support structure that complies with the claims of the present invention and any appropriate changes or modifications made thereto by ordinary technicians in the corresponding technical field shall fall within the patent protection scope of the present invention.

Claims

1. A filler for reducing deformation of an ultra-deep foundation pit support structure, characterized by: The invention comprises a first filling part and a second filling part, wherein the first filling part comprises a first filler (1) and a first connecting part, wherein the first filler (1) is filled perpendicularly to the supporting wall surface, the first connecting part comprises a plurality of vertically arranged threaded anchor rods (2), the lower ends of the threaded anchor rods (2) extend into the interior of the first filler (1), the second filling part comprises a second filler (3) and a second connecting part, the second filler (3) is filled horizontally at the lower part of the supporting wall surface, the second connecting part is connected to the second filler (3) and the bottom of the foundation pit, the second connecting part is provided with a supporting assembly, a filling pipe (4) is connected between the supporting assembly and the first filler (1), and the first filling pipe (4) is used to support the first filler (1) and the first filling part.

2. The filler for reducing deformation of an ultra-deep foundation pit support structure according to claim 1, characterized in that: The threaded anchor rods (2) connected to the same first filler (1) form a group, and a support portion is arranged between two adjacent groups of threaded anchor rods (2); The support portion comprises a pull plate (5), a connecting plate (6) and a support frame (7); one end of the pull plate (5) is connected to a threaded anchor rod (2) away from the supporting wall surface; the other end of the pull rod extends to the front side of the supporting wall surface and is connected to the connecting plate (6); the connecting plate (6) is fixedly connected to two adjacent pull plates (5); one end of the support frame (7) is fixed to the connecting plate (6), and the other end is tilted downward and supported on the bottom surface of the foundation pit.

3. The filler for reducing deformation of an ultra-deep foundation pit support structure according to claim 1, characterized in that: A tubular first filling cavity is provided at the lower portion of the supporting wall surface, and the first filling cavity is used to accommodate a first filler (1).

4. The filler for reducing deformation of an ultra-deep foundation pit support structure according to claim 1, characterized in that: The lower portion of the supporting wall is recessed to form a second filling cavity arranged along the length direction. The second filling cavity is used to accommodate a second filler (3). The length direction of the second filler (3) is perpendicular to the length direction of the first filler (1).

5. The filler for reducing deformation of an ultra-deep foundation pit support structure according to claim 2, characterized in that: The upper end of the threaded anchor rod (2) is provided with a fastening nut (8), which is in contact with and tightly pressed against the top of the slope to be supported; Several groups of threaded anchor rods (2) and first fillers (1) separate the slope to be supported into several reinforcement areas (9), so that the lower parts of adjacent reinforcement areas (9) are supported by different support components. When one reinforcement area (9) collapses, the impact on the adjacent reinforcement area (9) is reduced.

6. The filler for reducing deformation of an ultra-deep foundation pit support structure according to claim 1, characterized in that: The support assembly comprises an L-shaped support plate (10) and two jacks (11), the vertical portion of the L-shaped support plate (10) contacts the supporting wall surface, the horizontal portion of the L-shaped support plate (10) contacts the bottom surface of the foundation pit, and the L-shaped support plate (10) is connected to the second filler (3) via a plurality of expansion bolts; The jack (11) is vertically connected to the filling pipe (4), and the bottom of the jack (11) is fixed to the horizontal part of the L-shaped support plate (10).

7. The filler for reducing deformation of an ultra-deep foundation pit support structure according to claim 6, characterized in that: The support end of the jack (11) is detachably connected to a support block (12), the support block (12) is connected to the filling tube (4), and the support end is provided with a detection component for detecting the relative displacement between the filling tube and the support end.

8. The filler for reducing deformation of an ultra-deep foundation pit support structure according to claim 7, characterized in that: The detection assembly comprises a detection wheel (13) arranged along the length direction of the filling tube (4); a receiving groove is provided at the lower portion of the support block (12); the receiving groove is used to receive the support end; and a circumferential surface of the detection wheel (13) contacts the support block (12); The length direction of the receiving groove is arranged along the axis of the filling tube (4); the end of the receiving groove away from the supporting wall is sealed, and the end of the receiving groove in contact with the supporting wall is open.

9. The filler for reducing deformation of an ultra-deep foundation pit support structure according to claim 1, characterized in that: The first filler (1) and the second filler (3) are made of concrete.

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