Karst cave geological foundation pit supporting structure

Abstract

The utility model discloses a karst cave geological foundation pit support structure, this structure includes bottom plate, and the both sides fixed mounting of bottom plate has frame body, and the inside of frame body is equipped with the sliding slot along its vertical direction, and the bottom plate middle is rotatably connected with screw rod through bearing, and the screw rod can rotate freely at the bottom plate, and the top of screw rod is connected with the thread cylinder through the thread, and the top fixed mounting of thread cylinder has the support frame, and the both ends of support frame are equipped with the bending part of 90 degrees, and are slidably connected through the sliding slot in frame body and bending part. The utility model discloses through rotating screw rod, can accurate adjustment support frame's height, and the convenient adaptation different height's karst cave pit foundation carries out the support work of being convenient for, solved the problem that support structure height is fixed, cannot adapt to different height karst cave pit foundation, can adjust the support height according to actual geological condition, effectively prevent the karst cave pit foundation landslip, improved the applicability and construction safety of device significantly.

Description

Technical Field

[0001] This utility model belongs to the field of karst geological technology, and more specifically, relates to a karst geological foundation pit support structure. Background Technology

[0002] Caves are underground spaces formed in soluble rocks by karst processes. The formation of caves is the result of long-term erosion by groundwater in limestone areas. Insoluble calcium carbonate in limestone can be converted into soluble calcium bicarbonate by water and carbon dioxide. Due to the different amounts of limestone in different parts of the limestone layer, the degree of erosion varies, and the layers are gradually dissolved and divided into independent, unique, steep and beautiful peaks and caves with strange landscapes. The resulting landforms are generally called karst landforms.

[0003] When conducting geological exploration of karst caves, due to the complexity of the geological conditions and the presence of many uncertainties, support measures are usually taken for the karst cave foundation to ensure the smooth progress of the exploration process and the personal safety of the staff. Support work can not only effectively prevent dangerous situations such as collapse or slippage of the karst cave foundation during the exploration process, but also reduce the safety risks in the karst cave geological exploration process and ensure the smooth progress of the exploration work.

[0004] To address the aforementioned issues, patent document CN214657066U discloses a support structure for a karst cave foundation pit, comprising a fixed plate, support columns, a top plate, and a connecting cylinder. Support columns are fixedly installed on both sides of the bottom of the fixed plate. A bottom plate is movably connected to one side of each support column, and a fixed pin is movably connected to the bottom of the bottom plate. A fixed cylinder is movably connected to one side of each support column, and a telescopic rod is connected to one end of the fixed cylinder via a fixed pin. The bottom of the telescopic rod is movably connected to the bottom plate via a movable shaft. In this karst cave foundation pit support structure, the vibration generated during support by the support plate is transmitted to the movable block through the top plate, causing the movable block to move left and right. Adjustable springs, in conjunction with telescopic springs, buffer and dampen the vibration, thereby extending the service life of the support structure. A rotating handle drives the fixed pin to rotate, which in turn drives the fixed pin to move up and down, thus adjusting the height of the fixed pin. However, the overall support height is fixed. Since the height of the karst cave foundation often varies depending on the geological conditions, it is difficult to ensure that the height of the karst cave foundation is completely consistent with the height of the support structure. In order to avoid safety accidents such as collapse during the construction of the karst cave foundation, the support height needs to be flexibly adjusted according to the actual geological structure and other environmental factors. Utility Model Content

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a support structure for karst cave foundation pits. A handle drives a screw to rotate, which in turn drives a threaded cylinder to move up and down along the screw's axial direction. This movement of the threaded cylinder causes a support frame fixedly connected to its top to rise or fall, thereby adjusting the height of the support frame. This allows the support frame to be precisely adjusted to match the actual height of the karst cave foundation, ensuring that multiple contact plates at the top of the support frame gradually contact the top of the karst cave foundation as the support frame rises. Since the top surface of the karst cave foundation is typically... The surface is uneven. When the contact plate comes into contact with it, it will move the corresponding vertical rod into the corresponding cylinder to varying degrees according to different heights and shapes. In this process, the spring plays a key role in buffering and supporting. As the vertical rod moves into the cylinder, the spring is compressed, thereby generating an upward elastic force. This elastic force can provide stable support for the contact plate, ensuring that the contact plate fits tightly against the uneven surface of the top of the sinkhole foundation. Multiple sets of contact plates can flexibly adjust the contact range with the top of the sinkhole foundation according to the actual shape of the top of the sinkhole foundation, thereby significantly increasing the contact area and ensuring the stability of the support for the top of the sinkhole foundation.

[0006] To achieve the above objectives, this utility model provides a support structure for karst cave foundation pits, including a base plate. Frames are fixedly installed on both sides of the base plate. A sliding groove is provided inside the frame along its vertical direction. A screw is rotatably connected to the middle of the base plate via a bearing. The screw can rotate freely at the base plate. A threaded cylinder is threadedly connected to the top of the screw. A support frame is fixedly installed on the top of the threaded cylinder. The support frame has 90-degree bends at both ends, which are slidably connected to the sliding grooves inside the frame. By rotating the screw, the height of the support frame can be precisely adjusted to accommodate karst cave foundation pits of different heights for support work, thereby preventing karst cave foundation pit collapse.

[0007] Furthermore, multiple sets of cylinders are fixedly installed on the top of the support frame, and a spring is fixedly installed at the bottom of each cylinder. A vertical rod is fixedly installed at the other end of the spring. The vertical rod can move up and down inside the cylinder. A contact plate is fixedly installed at the top of the vertical rod. The contact plate is used to contact the top of the sinkhole foundation.

[0008] Furthermore, the front and rear faces of the bent portions at both ends of the support frame are provided with multiple first through holes, and the front and rear faces of the frame are provided with second through holes. Matching round rods are provided in the first and second through holes.

[0009] Furthermore, a limit block is fixedly installed on one end of the round rod.

[0010] Furthermore, the bottom plate has a third through hole at each of its four top corners.

[0011] Furthermore, a handle is fixedly mounted on the screw.

[0012] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0013] (1) The karst cave foundation pit support structure of this utility model, through the cooperation between the screw, the threaded cylinder, the support frame and the handle, drives the screw to rotate through the handle. The rotation of the screw will drive the threaded cylinder to move up and down along the axial direction of the screw. The movement of the threaded cylinder will drive the support frame fixedly connected to its top to rise or fall together, thereby realizing the height adjustment of the support frame. This allows the support frame to be precisely adjusted to a height position that matches the actual height of the karst cave foundation, thus facilitating effective support work for karst cave foundations of different heights. It can effectively prevent safety accidents such as collapse of the karst cave foundation during construction, and provide a safer and more reliable guarantee for foundation pit construction.

[0014] (2) The karst cave foundation pit support structure of this utility model provides important stability guarantee for the support of the top of the karst cave foundation through the synergistic effect between the cylinder, vertical rod, spring and contact plate. When the height of the support frame is adjusted, the multiple sets of contact plates at the top of the support frame will gradually contact the top of the karst cave foundation as the support frame rises. Since the surface of the top of the karst cave foundation is usually uneven, the contact plate will drive the corresponding vertical rod to move into the corresponding cylinder to different degrees according to different heights and shapes when it contacts it. In this process, the spring plays a key role in buffering and supporting. As the vertical rod moves into the cylinder, the spring is compressed, thereby generating an upward elastic force. This elastic force can provide stable support for the contact plate and ensure that the contact plate is tightly attached to the uneven surface of the top of the karst cave foundation. The multiple sets of contact plates can flexibly adjust the contact range with the top of the foundation pit according to the actual shape of the top of the karst cave foundation, thereby significantly increasing the contact area and ensuring the stability of the support for the top of the karst cave foundation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a karst cave foundation pit support structure according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 Enlarged schematic diagram of a local structure at point A;

[0017] Figure 3 This is a cross-sectional view of a karst cave foundation pit support structure according to an embodiment of the present invention;

[0018] Figure 4 for Figure 3 Enlarged schematic diagram of the local structure at point B.

[0019] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-base plate, 2-screw, 3-threaded cylinder, 4-support frame, 5-frame, 6-cylinder, 7-vertical rod, 8-spring, 9-contact plate, 10-first through hole, 11-second through hole, 12-round rod, 13-limiting block, 14-handle, 15-third through hole. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] In this patent, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0024] like Figure 1As shown, this utility model provides a support structure for a karst cave foundation pit, including a base plate 1. Frames 5 are fixedly installed on both sides of the base plate 1. The interior of each frame 5 has a vertical groove. A screw 2 is rotatably connected to the center of the base plate 1 via a bearing, allowing free rotation at the base plate 1. A threaded cylinder 3 is threadedly connected to the top of the screw 2. A support frame 4 is fixedly installed on the top of the threaded cylinder 3. The support frame 4 has 90-degree bends at both ends, which slide through the grooves in the frame 5, thus achieving stable support and flexible adjustment. The combined design of the base plate 1, frame 5, and support frame 4 forms a strong, integrated support structure. The threaded connection between the screw 2 and the threaded cylinder 3 allows for easy adjustment of the height of the support frame 4. By rotating the screw 2, the height of the support frame 4 can be precisely adjusted, facilitating support work for karst cave foundation pits of different heights, preventing collapse of the karst cave foundation, meeting various needs during construction, and improving the adaptability and flexibility of the support structure.

[0025] Furthermore, such as Figure 3 As shown, multiple sets of cylindrical bodies 6 are fixedly installed on the top of the support frame 4. A spring 8 is fixedly installed at the bottom of each cylindrical body 6, and a vertical rod 7 is fixedly installed at the other end of each spring 8. The vertical rod 7 can move up and down within the cylindrical body 6, and the spring 8 provides an upward force for the vertical rod 7. A contact plate 9 is fixedly installed at the top of the vertical rod 7, and the contact plate 9 is used to contact the top of the karst cave foundation. During construction, when the support frame 4 moves upward, it will drive the multiple sets of contact plates 9 to move upward synchronously. Since the surface of the top of the karst cave foundation is usually uneven, the contact plates 9 will move according to these uneven surfaces. The irregular surfaces gradually come into contact with the top of the karst pit foundation. As the support frame 4 continues to rise, the contact plate 9 pushes the vertical rod 7 to gradually move into the corresponding cylinder 6, compressing the spring 8 in the process. The compression of the spring 8 provides a certain elastic buffer, allowing the contact plate 9 to fit tightly against the uneven surface of the karst pit foundation. This not only expands the contact range between the contact plate 9 and the top of the karst pit foundation, but also ensures a tight connection between the support structure and the top of the karst pit foundation, thereby effectively guaranteeing the stability of the karst pit foundation support and providing a safer and more reliable support environment for the foundation pit construction.

[0026] Furthermore, such as Figure 2-4As shown, the front and rear faces of the bent portions at both ends of the support frame 4 are provided with multiple first through holes 10, and the front and rear faces of the frame 5 are provided with second through holes 11. The first and second through holes 10 and the second through holes 11 are provided with matching round rods 12. After the support frame 4 has been adjusted in height, the round rods 12 can be precisely connected to the corresponding first through holes 10 on the support frame 4 through the two sets of second through holes 11 on the frame 5. This allows the round rods 12 to effectively restrict the movement of the support frame 4, thereby significantly improving the placement stability of the support frame 4. This ensures the stability of the support frame 4 after height adjustment and further enhances its support stability for the karst pit foundation. This can effectively prevent the positional displacement of the support frame 4 caused by external factors and ensure the reliability and safety of the entire support structure.

[0027] Furthermore, a limiting block 13 is fixedly installed on one end of the round rod 12. When the round rod 12 needs to be connected with the second through hole 11 on the frame 5 and the first through hole 10 on the support frame 4, the limiting block 13 can effectively prevent one end of the round rod 12 from moving excessively into the first through hole 10, thereby avoiding the situation where the round rod 12 and the second through hole 11 cannot be accurately connected. Through this precise limiting function, the limiting block 13 not only improves the connection stability between the round rod 12 and the corresponding first through hole 10 and second through hole 11, but also further ensures the firmness and reliability of the connection between the support frame 4 and the frame 5. It can effectively prevent structural loosening or instability caused by inaccurate connection, thereby providing a strong guarantee for the stable operation of the entire support system.

[0028] Furthermore, the bottom plate 1 is provided with a third through hole 15 at the four corners of its top end. The third through hole 15 is used to fix the bottom plate 1 to the foundation of the external karst pit, which can ensure the stability of the bottom plate 1 at the foundation of the karst pit and effectively prevent the bottom plate 1 from shifting or loosening due to complex geological conditions, thereby enhancing the stability and reliability of the entire support structure.

[0029] Furthermore, a handle 14 is fixedly installed on the screw 2, allowing construction personnel to easily rotate the screw 2 manually. The screw 2 can precisely control the lifting and lowering of the threaded cylinder 3, enabling construction personnel to quickly and accurately adjust the height of the support frame 4 on site to adapt to the needs of different heights of the karst pit foundation.

[0030] In another embodiment of this utility model, a method for using a karst cave foundation pit support structure is provided. First, when the screw 2 is rotated by the handle 14, the screw 2 drives the threaded cylinder 3 connected to it to move up and down, thereby driving the support frame 4 to adjust its height. During the rising process of the support frame 4, multiple sets of contact plates 9 at its top will contact the uneven surface of the top of the karst cave foundation pit one by one. As the support frame 4 continues to rise, the contact plates 9 will push the vertical rod 7 into the corresponding cylinder 6, thereby compressing the spring 8, so that the contact plates 9 at different heights can adjust their height according to the height of the cylinder. The shape of the top of the karst pit foundation is closely fitted to the corresponding contact area, thereby expanding the contact area with the top of the karst pit foundation and effectively ensuring the stability of the support for the karst pit foundation. After the height adjustment is completed, the round rod 12 is inserted through the second through hole 11 on the frame 5 and connected to the first through hole 10 on the support frame 4. The insertion of the round rod 12 can restrict the movement of the support frame 4 and ensure that it remains stable at the adjusted height position, thereby further improving the support strength of the support frame 4 for the karst pit foundation and providing a safer and more reliable support environment for the foundation pit construction.

[0031] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A support structure for a karst cave foundation pit, characterized in that, Includes a base plate (1), on both sides of which a frame (5) is fixedly installed. The frame (5) has a groove along its vertical direction inside. A screw (2) is rotatably connected to the middle of the base plate (1) through a bearing. The screw (2) can rotate freely at the base plate (1). A threaded cylinder (3) is threadedly connected to the top of the screw (2). A support frame (4) is fixedly installed on the top of the threaded cylinder (3). The support frame (4) has 90-degree bends at both ends. The bends are slidably connected to the grooves inside the frame (5). By rotating the screw (2), the height of the support frame (4) can be precisely adjusted to adapt to the support work of karst pit foundations of different heights, thereby preventing the karst pit foundation from collapsing.

2. The karst cave geological foundation pit support structure according to claim 1, characterized in that, The support frame (4) has multiple sets of cylinders (6) fixedly installed on the top. Each cylinder (6) has a spring (8) fixedly installed at the bottom. The other end of the spring (8) has a vertical rod (7) fixedly installed. The vertical rod (7) can move up and down inside the cylinder (6). The top of the vertical rod (7) has a contact plate (9) fixedly installed. The contact plate (9) is used to contact the top of the sinkhole foundation.

3. The karst cave geological foundation pit support structure according to claim 1, characterized in that, The front and rear faces of the bent portions at both ends of the support frame (4) are provided with multiple first through holes (10), and the front and rear faces of the frame (5) are provided with second through holes (11). The first through holes (10) and the second through holes (11) are provided with matching round rods (12).

4. The karst cave geological foundation pit support structure according to claim 3, characterized in that, A limit block (13) is fixedly installed on one end of the round rod (12).

5. A karst cave foundation pit support structure according to any one of claims 1-4, characterized in that, The bottom plate (1) has a third through hole (15) at the four corners of its top.

6. A karst cave foundation pit support structure according to any one of claims 1-4, characterized in that, A handle (14) is fixedly installed on the screw (2).

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