Special-shaped foundation pit high-strength supporting structure

Abstract

The invention relates to the technical field of foundation pit supporting, in particular to a high-strength supporting structure for a special-shaped foundation pit. Comprising a fixing base and a plurality of reinforcing pull rods, one ends of the reinforcing pull rods are connected with the fixing base, monitoring pipes are arranged in the middles of the reinforcing pull rods, the reinforcing pull rods on the sides, away from the fixing base, of the monitoring pipes are reinforcing sections, and inhaul cables are arranged on the outer sides of the reinforcing sections; the upper end of the inhaul cable is connected with one end of the reinforcing section, the lower end of the inhaul cable is downwards connected with the lower end of the reinforcing section through the bent position of the reinforcing section, two continuous arch-shaped reinforcing beams are formed between the inhaul cable and the reinforcing section, and a plurality of reinforcing pulling plates are arranged between the arch-shaped reinforcing beams and the reinforcing section. The lower end of the monitoring pipe extends into the lower portion of the side wall of the foundation pit, when the upper portion and the lower portion of the side wall of the foundation pit collapse, the monitoring pipe deforms, then the irradiation position of laser on the detection disc is affected, the laser irradiation position is detected through the detection disc, the deformation position of the side edge of the foundation pit can be judged in time, and early warning is achieved.

Description

Technical Field

[0001] This invention relates to the field of foundation pit support technology, specifically a high-strength support structure for irregularly shaped foundation pits. Background Technology

[0002] In urban construction, foundation pit engineering is a crucial part of foundation construction, especially when encountering irregularly shaped foundation pits, where the difficulty of support increases significantly. Irregularly shaped foundation pits, such as... Figure 1 As shown, this structure contains multiple right-angle corner areas. Due to stress concentration, these right-angle corner areas are the weakest points in the structure, most prone to deformation and even collapse. Traditional foundation pit support structures (such as pile walls, diaphragm walls combined with internal bracing or anchor cables) have limited effectiveness in controlling stress concentration and deformation in right-angle areas when facing such right-angle sidewalls. They are unable to provide sufficient lateral restraint and deformation resistance, which can easily lead to instability of the corner soil or excessive deformation of the support structure itself. Furthermore, existing support structures are generally fixed to the lower part of the sidewall, occupying a large area. Deformation monitoring of foundation pit sidewalls, especially deep sidewalls, usually relies on external instruments (such as inclinometers) or manual observation points, making it difficult to capture minute deformations in key areas (such as the deep parts of right-angle sidewalls) in a timely manner. Delayed early warnings may lead to safety accidents. The various parts of the existing support structure (support, anchoring, monitoring) are relatively independent, with weak synergy. Especially when dealing with irregularly shaped foundation pits with complex stress distributions, there is still room for improvement in overall stiffness and stability.

[0003] Therefore, there is an urgent need to develop an integrated structure that combines high-strength support and real-time deformation monitoring for the right-angled sidewalls of irregularly shaped foundation pits, in order to improve the safety and reliability of foundation pit engineering. Summary of the Invention

[0004] To address the above problems, this invention provides a high-strength support structure for irregularly shaped foundation pits.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a high-strength support structure for irregular foundation pits, including a fixed base and several reinforcing tie rods. One end of the reinforcing tie rod is connected to the fixed base, and a connecting seat is provided at the outer end of the reinforcing tie rod. The connecting seat is fixed to the right-angle sidewall of the irregular foundation pit. A monitoring tube is provided in the middle of the reinforcing tie rod. The reinforcing tie rod on the side away from the fixed base of the monitoring tube is a reinforcement section. A cable is provided on the outer side of the reinforcement section. The upper end of the cable is connected to one end of the reinforcement section, and the lower end of the cable is connected downward to the lower end of the reinforcement section after passing through the bend of the reinforcement section. The cable and the reinforcement section form two continuous arched reinforcement beams, and several reinforcing plates are provided between the arched reinforcement beams and the reinforcement section.

[0006] As an optimization, the fixing base includes a fixed base plate and a vertical support rod. The fixed base plate is fixed to the top of the pit away from the right-angle sidewall, and the reinforcing tie rod is fixedly connected to the vertical support rod.

[0007] As an optimization, several reinforcing rods are arranged parallel to each other vertically, the reinforcing rods are arranged along the angle bisector of the right-angled sidewall, the outer ends of the reinforcing rods are bent downwards and arranged on the outside of the right-angled sidewall, the connecting seats are right-angled, and the connecting seats of several reinforcing rods are evenly distributed along the height direction of the right-angled sidewall.

[0008] As an optimization, a laser emitting assembly is configured on the upper side of the monitoring tube, with the emitting end of the laser emitting assembly facing the axis of the monitoring tube. A detection assembly is configured inside the monitoring tube, the detection assembly including a lifting screw and a detection disk. A lifting motor is configured at the lower end of the lifting screw. The detection disk is threadedly connected to the lifting screw. A detection sensor is laid on the upper surface of the detection disk. The detection disk is coaxially arranged with the monitoring tube, and the detection disk slides against the inner wall of the monitoring tube.

[0009] As an optimization, the detection sensor includes a position-sensitive detector or a two-dimensional CMOS / CCD image sensor.

[0010] As an optimization, the lower end of the monitoring tube extends into the lower part of the side wall of the irregular foundation pit.

[0011] As an optimization, an L-shaped support frame is provided on the upper side of the irregular pit sidewall, and the laser emitting component is fixed to the outer end of the horizontal part of the L-shaped support frame.

[0012] As an optimization, during use, the detection plate is raised and lowered to different heights, and the laser irradiation position at different heights is detected by the detection sensor on the detection plate. When the laser irradiation position on the detection plate is different, it indicates that the sidewall of the irregular foundation pit has deformed.

[0013] The beneficial effects of this plan are as follows: By setting the reinforcing tie rod along the bisector of the right-angle side wall and bending its outer end downwards to fix it to the outside of the side wall through a right-angle connecting seat, the force transmission path is clearly defined, directly anchoring and supporting the right-angle area where the stress is most concentrated. Cables are installed on the outside of the reinforced section, connecting the upper and lower ends of the reinforced section and passing through its bends, forming two continuous arched reinforced beams together with the reinforced section. The arched structure is a natural and excellent form of compressive and bending resistance, which can effectively disperse and transfer the concentrated stress at the corners, and significantly enhance the overall stiffness and deformation resistance of the area. A monitoring tube is integrated into the middle of the reinforcing tie rod, with its lower end extending into the lower part of the pit sidewall. This tube can directly reflect the deformation at different locations. When the upper and lower parts of the pit sidewall collapse, the monitoring tube will deform, which will affect the laser irradiation position on the detection plate. By detecting the laser irradiation position on the detection plate, the deformation position of the pit sidewall can be determined in time, thus achieving early warning. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the irregular-shaped foundation pit sidewall of the present invention.

[0015] Figure 2 This is a schematic diagram of the connection structure of the present invention from the axial side.

[0016] Figure 3 This is a front view schematic diagram of the connection structure of the present invention.

[0017] Figure 4 This is an isometric view of the fixed structure of the laser emitting component of the present invention.

[0018] Figure 5 This is a top view of the connection structure of the present invention.

[0019] Figure 6 For the present invention Figure 5 A schematic diagram of the AA cross-section structure.

[0020] Figure 7 For the present invention Figure 6 A magnified structural diagram of part B.

[0021] Among them, 1. fixed seat, 2. reinforcing tie rod, 3. monitoring tube, 4. reinforced section, 5. cable, 6. arched reinforcing beam, 7. reinforcing tie plate, 8. connecting seat, 9. laser emitting assembly, 10. detection plate, 11. lifting screw, 12. lifting motor, 13. L-shaped support frame. Detailed Implementation

[0022] like Figures 2-7 As shown, a high-strength support structure for an irregularly shaped foundation pit includes a fixed base 1 and several reinforcing tie rods 2. One end of the reinforcing tie rod 2 is connected to the fixed base 1, and a connecting seat 8 is provided at the outer end of the reinforcing tie rod 2. The connecting seat 8 is fixed to the right-angle sidewall of the irregularly shaped foundation pit. A monitoring tube 3 is provided in the middle of the reinforcing tie rod 2. The reinforcing tie rod 2 on the side away from the fixed base 1 of the monitoring tube 3 is a reinforcement section 4, and a cable 5 is provided on the outer side of the reinforcement section 4. The upper end of the cable 5 is connected to one end of the reinforcement section 4, and the lower end of the cable 5 is connected downward to the lower end of the reinforcement section 4 through the bend of the reinforcement section 4. The cable 5 and the reinforcement section 4 form two continuous arched reinforcement beams 6, and several reinforcing plates 7 are provided between the arched reinforcement beams 6 and the reinforcement section 4.

[0023] The length of the reinforcing tie rod 2 is customized according to the depth of the foundation pit. The length of the reinforcing tie rod 2 located on the lower side is shorter than that of the reinforcing tie rod 2 located on the upper side, so that the adjacent reinforcing tie rods 2 do not affect each other.

[0024] The connecting seat 8 is made of right-angled steel plate and is fixed to the side wall of the foundation pit by expansion anchor rods. Multiple connecting seats 8 can efficiently connect and protect the right-angle bends of the foundation pit.

[0025] like Figure 2 As shown, the fixed base 1 includes a fixed base plate and a vertical support rod. The fixed base plate is fixed to the top of the pit away from the right-angle side wall, and the reinforcing tie rod 2 is fixedly connected to the vertical support rod.

[0026] The fixed seat 1 should be located away from the side wall of the foundation pit where it is prone to collapse, in order to ensure the stability of the fixed seat 1.

[0027] like Figure 2 As shown, several reinforcing rods 2 are arranged vertically in parallel. The reinforcing rods 2 are arranged along the angle bisector of the right-angled sidewall. The outer ends of the reinforcing rods 2 are bent downwards and arranged on the outside of the right-angled sidewall. The connecting seat 8 is right-angled, and the connecting seats 8 of several reinforcing rods 2 are evenly distributed along the height direction of the right-angled sidewall.

[0028] The reinforcing tie rod 2 can be distributed along the diagonal, or it can be appropriately deflected according to the space conditions, specifically to facilitate the reinforcement of the right-angle sidewall and facilitate the connection between structures.

[0029] like Figure 6 and Figure 7 As shown, a laser emitting component 9 is arranged on the upper side of the monitoring tube 3, and the emitting end of the laser emitting component 9 is arranged facing the axis of the monitoring tube 3. A detection component is arranged inside the monitoring tube 3. The detection component includes a lifting screw 11 and a detection disk 10. A lifting motor 12 is arranged at the lower end of the lifting screw 11. The detection disk 10 is threadedly connected to the lifting screw 11. A detection sensor is laid on the upper surface of the detection disk 10. The detection disk 10 is coaxially arranged with the monitoring tube 3. The detection disk 10 slides against the inner wall of the monitoring tube 3.

[0030] The laser emitting component 9 can be a semiconductor laser, fixed to the outer end of the L-shaped support frame 13, 1-2.5m away from the upper end of the monitoring tube 3.

[0031] The stroke of the lifting screw 11 covers the entire length of the monitoring tube 3, and the diameter of the detection plate 10 is slightly smaller than the inner diameter of the monitoring tube 3, so that the detection plate 10 can move freely.

[0032] The detection sensor includes a position-sensitive detector or a two-dimensional CMOS / CCD image sensor.

[0033] At the core of a position-sensitive detector is a specially designed photodiode with a continuous, uniform resistive layer. When a laser spot illuminates the photosensitive surface, a photocurrent is generated at the illumination point. This current flows to electrodes distributed along the detector's edges (usually the four corners or opposite sides). By measuring the proportion (or difference) of the current collected on different electrodes, the center position (X, Y coordinates) of the light spot can be accurately calculated; the output is an analog voltage or current, directly corresponding to the absolute position coordinates (X, Y) of the light spot.

[0034] A two-dimensional CMOS / CCD image sensor is essentially a miniaturized digital camera sensor, composed of millions of tiny photosensitive pixels arranged in a matrix. When a laser beam shines on the sensor surface, one or more pixels are illuminated. By reading the signals from all pixels and performing image processing (such as centroid algorithms, thresholding, and spot detection), the center position of the bright spot can be calculated.

[0035] like Figure 6 As shown, the lower end of the monitoring tube 3 extends into the lower part of the side wall of the irregular foundation pit.

[0036] like Figure 2 As shown, an L-shaped support frame 13 is provided on the upper side of the irregular foundation pit sidewall, and the laser emitting component 9 is fixed to the outer end of the horizontal part of the L-shaped support frame 13.

[0037] In use, the detection plate 10 is raised and lowered to different heights, and the laser irradiation position at different heights is detected by the detection sensor on the detection plate 10. When the laser irradiation position on the detection plate 10 is different, it indicates that the side wall of the irregular foundation pit has deformed.

[0038] In practical use, the device is connected to the reinforcing rod 2 through the fixed base 1. The outer end of the reinforcing rod 2 is connected to the right-angle side wall through the connecting base 8. The right-angle side wall is tightened at different heights through multiple reinforcing rods 2. The monitoring tube 3 is located between the connecting seat 8 and the fixed seat 1, and the laser emitting component 9 is located on the upper side of the monitoring tube 3. During use, the detection plate 10 is raised and lowered by the lifting motor 12, and stops at the highest, lowest and middle positions of the lifting screw 11 to detect the laser irradiation position. When the laser irradiation positions at the highest point, lowest point, and middle are located at the same (X,Y) coordinate, it indicates that the right-angled sidewall has not collapsed or deformed. When the laser irradiation position at the highest point is the same as that at the middle point, and the laser irradiation position at the lowest point is shifted to the side of the detection disk 10 closer to the fixed base 1, the lower part of the surface monitoring tube 3 deflects towards the right-angle sidewall, and the lower part of the right-angle sidewall is deformed or collapsed. Conversely, if the laser irradiation at the highest point is deflected while the laser irradiation positions at the middle and lowest points remain unchanged, it indicates that the upper part of the right-angled sidewall has deformed. Based on the detection results of monitoring tube 3, the deformation of the right-angle sidewall can be monitored in a timely manner, facilitating real-time early warning.

[0039] The above-described specific embodiments are merely specific examples 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-described specific embodiments. Any high-strength support structure for irregular foundation pits that conforms to the claims of the present invention, and any appropriate changes or modifications made to it by those skilled in the art, shall fall within the patent protection scope of the present invention.

Claims

1. A high-strength support structure for irregularly shaped foundation pits, characterized in that: The utility model relates to a kind of monitoring device for irregular foundation pit, including fixed seat (1) and several reinforcing pull rods (2), one end of the reinforcing pull rod (2) is connected with fixed seat (1), the outer end of the reinforcing pull rod (2) is equipped with connecting seat (8), connecting seat (8) is fixed to the right angle side wall of irregular foundation pit, the middle part of the reinforcing pull rod (2) is equipped with monitoring tube (3), the reinforcing pull rod (2) far from the side of fixed seat (1) is reinforced segment (4), the outer side of the reinforced segment (4) is provided with cable (5); The upper end of the cable (5) is connected with one end of the reinforced segment (4), the lower end of the cable (5) passes through the bending of the reinforced segment (4) and is connected with the lower end of the reinforced segment (4) downward, two continuous arched reinforced beams (6) are formed between the cable (5) and the reinforced segment (4), a plurality of reinforcing pull plates (7) are provided between the arched reinforced beam (6) and the reinforced segment (4).

2. The high-strength support structure for a foundation pit of a special shape according to claim 1, characterized in that: The fixed seat (1) includes a fixed bottom plate and a vertical support rod, the fixed bottom plate is fixed to the top of the foundation pit away from the right angle side wall, and the reinforcing pull rod (2) is fixedly connected with the vertical support rod.

3. The high-strength support structure for a foundation pit of a special shape according to claim 1, characterized in that: A plurality of the reinforcing pull rods (2) are arranged in parallel, the reinforcing pull rods (2) are arranged along the angle bisector of the right angle side wall, the outer ends of the reinforcing pull rods (2) are bent downward and arranged on the outer side of the right angle side wall, the connecting seat (8) is of a right angle type, and the connecting seats (8) of the reinforcing pull rods (2) are uniformly distributed along the height direction of the right angle side wall.

4. The high-strength support structure for a foundation pit of a special shape according to claim 1, characterized in that: The upper side of the monitoring tube (3) is provided with a laser emitting assembly (9), the emitting end of the laser emitting assembly (9) is arranged towards the axis of the monitoring tube (3), the inside of the monitoring tube (3) is provided with a detection assembly, the detection assembly includes a lifting lead screw (11) and a detection disc (10), the lower end of the lifting lead screw (11) is provided with a lifting motor (12), the detection disc (10) is threadedly connected with the lifting lead screw (11), the upper surface of the detection disc (10) is paved with a detection sensor, the detection disc (10) is coaxially arranged with the monitoring tube (3), and the detection disc (10) is limitingly and slidably arranged with the inner wall of the monitoring tube (3).

5. The high-strength support structure for a foundation pit of a special shape according to claim 4, characterized in that: The detection sensor includes a position sensitive detector or a two-dimensional CMOS / CCD image sensor.

6. The high-strength support structure for a foundation pit of irregular shape according to claim 1, characterized in that: The lower end of the monitoring tube (3) extends into the lower part of the side wall of the irregular foundation pit.

7. The high-strength support structure for a foundation pit of a special shape according to claim 4, characterized in that: The upper side of the side wall of the irregular foundation pit is provided with an L-shaped support frame (13), and the laser emitting assembly (9) is fixed to the outer end of the horizontal part of the L-shaped support frame (13).

8. The high-strength support structure for a foundation pit of a special shape according to claim 4, characterized in that: In use, the detection disc (10) is lifted to different heights respectively, the detection sensor on the detection disc (10) detects the laser irradiation positions at different heights, and when the laser irradiation positions on the detection disc (10) are different, it indicates that the side wall of the irregular foundation pit is deformed.

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