Mechanism and method for anti-destruction reinforcement of geotechnical engineering

Abstract

The present invention discloses a mechanism and method for anti-destruction reinforcement of geotechnical engineering, including a foundation pit support assembly, the foundation pit support assembly includes two panels, and also includes a support frame, the support frame includes a vertical pole and multiple cross bars, and also includes a sleeve mounted on the vertical pole and capable of sliding along the axis of the vertical pole, each sleeve is fixed with two cross bars, and the cross bars on each sleeve are linearly symmetrical with respect to the axis of the sleeve; the length of the cross bar is adjustable; it also includes a lifting ring arranged on the top of the vertical pole, the downward projection of the lifting ring falls on the cross bar, and the axis of the lifting ring is colinear with the axis of the vertical pole; a locking device for locking the position of the sleeve on the axis of the vertical pole is arranged between each sleeve and the vertical pole; the lifting ring is detachably connected to the vertical pole. The method is a geotechnical engineering reinforcement method based on the mechanism, and by adopting the mechanism and method provided by the scheme, a safe and reliable geotechnical engineering anti-destruction slope reinforcement scheme can be obtained under economic and reasonable conditions.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit construction, and in particular to a mechanism and method for anti-destruction reinforcement of geotechnical engineering. Background Art

[0002] The foundation pit generally refers to the earth pit excavated at the design location of the building foundation according to the building base elevation and foundation plane size. For the foundation pit construction, the foundation pit support mechanism is a temporary structure and a safety protection structure to prevent collapse during the foundation pit construction process. At the same time, during the foundation pit excavation and construction process, it is necessary to consider the precipitation of the foundation pit.

[0003] The strata of sandy pebble geology are generally loose and rich in water. When constructing foundation pits in water-rich sandy pebble strata close to important buildings, special attention should be paid to the impact of ground precipitation on the surrounding environment. Therefore, in the existing construction, there are a series of problems in the construction process of deep foundation pits in sandy pebble strata (excavation depth exceeds 5 meters (including 5 meters), or the depth does not exceed 5 meters, but the geological conditions, surrounding environment and underground pipelines are particularly complex), such as great construction difficulty and great impact on the surrounding environment.

[0004] However, there are few practical methods for selecting a safe, reliable, economically reasonable, environmentally friendly and low-carbon support solution for high slopes or deep foundation pits that meet specific engineering geological conditions, surrounding environment and resource constraints. Summary of the invention

[0005] In view of the above-mentioned high slope or deep foundation pit support schemes proposed for specific engineering geological conditions, surrounding environment and resource limitations, there are few practical methods for selecting a safe, reliable, economically reasonable, environmentally friendly and low-carbon scheme. The present invention provides a mechanism and method for anti-destruction reinforcement of geotechnical engineering. By adopting the mechanism and method provided by this scheme, a safe and reliable geotechnical engineering anti-destruction slope reinforcement scheme can be obtained under economical and reasonable conditions.

[0006] The mechanism and method for anti-destruction reinforcement of geotechnical engineering provided by the present invention solve the problem through the following technical points: the mechanism for anti-destruction reinforcement of geotechnical engineering includes a foundation pit support assembly, the foundation pit support assembly includes two enclosures, and also includes a support frame for supporting the enclosures, the two enclosures are distributed on a pair of opposite sides of the support frame;

[0007] The support frame includes a vertical pole and a plurality of cross bars arranged along the axis direction of the vertical pole, the cross bars serving as support members between the vertical pole and the inner side of the enclosure, and also includes a sleeve mounted on the vertical pole and capable of sliding along the axis of the vertical pole, two cross bars are fixed on each sleeve, and the cross bars on each sleeve are linearly symmetrical with respect to the axis of the sleeve;

[0008] The length of the crossbar is adjustable;

[0009] It also includes a lifting ring arranged on the top of the vertical pole, the downward projection of the lifting ring falls on the crossbar, and the axis of the lifting ring is colinear with the axis of the vertical pole;

[0010] A locking device is provided between each sleeve and the vertical rod for locking the position of the sleeve on the axis of the vertical rod;

[0011] The hanging ring is detachably connected to the vertical pole.

[0012] This scheme provides a technical solution that is beneficial to the risk control of foundation pit construction in sand and gravel formations, as sand and gravel formations are usually rich in water and very prone to collapse.

[0013] When in use, the enclosure is in contact with the edge of the foundation pit to form a temporary support for the foundation pit. The support frame is used to provide thrust for the enclosure so that the enclosure can fit well with the edge of the foundation pit.

[0014] In the specific structural design, it is set as follows: the enclosure is composed of two pieces and distributed on a pair of opposite sides of the support frame. Regarding the force on the vertical pole, since the thrust directions of the cross bars from different sides are opposite, the assembly composed of the sleeve and the cross bar can effectively optimize the force on the vertical pole and improve the stability of the support frame.

[0015] The sleeve is arranged to slide along the axis of the vertical pole, and a detachable lifting ring is arranged at the upper end of the vertical pole, so that a safe and reliable anti-destruction slope reinforcement scheme for geotechnical engineering can be obtained in an economical, reasonable and easy-to-operate manner through the following operations:

[0016] S1. Complete the installation of all sleeves on the vertical poles, and the sleeves are stacked at the bottom of the vertical poles;

[0017] Complete the installation of the enclosure on both sides of the support frame, and make the enclosure fit against the side of the foundation pit;

[0018] Complete the installation of the lifting ring on the top of the pole;

[0019] S2. Adjust the length of the cross bars on both sides of the bottom sleeve so that both ends of the cross bars form a supporting relationship with the corresponding side panels;

[0020] S3, using the lifting tool hung on the lifting ring, lift the crossbar on the upper sleeve of the lowest sleeve in turn, so that the corresponding sleeve moves with the crossbar on it to the required position of the vertical pole axis;

[0021] The specific lifting is as follows: the top sleeve is lifted first and after the axis position is determined, the length of the cross bar is adjusted to constrain the corresponding side panel, and then one of them is fixed on the vertical pole through the corresponding locking device. Then, in the arrangement order of the sleeves, the position of each sleeve on the vertical pole is adjusted from top to bottom, the length of the cross bar is adjusted to constrain the panel and the position is fixed on the vertical pole.

[0022] The lifting ring is detachable, so that the vertical pole can be erected at the installation position in the form of a bare pole first, and then the sleeves are installed from the upper end of the vertical pole, and then the lifting ring is installed to provide a lifting point located at the top of the vertical pole for each sleeve.

[0023] In the specific structural limitations and operating methods, the cross bar on the lowest sleeve can be used to implement the use of the enclosure to form an anti-falling constraint for the supporting state of the vertical pole. In this way, when the subsequent sleeve is lifted, the vertical pole can be in a relatively stable state until the position adjustment of all sleeves is completed. For example, a hand hoist or electric hoist can be used to lift the combination of the sleeve and the cross bar, thereby realizing the anti-falling constraint of the vertical pole and completing the subsequent lifting, which is easy to operate and economical.

[0024] As a further technical solution of the mechanism:

[0025] As a technical solution with high locking reliability and easy locking, it is set as follows: the locking device includes a plurality of latch holes arranged on the vertical pole and arranged in sequence along the axis of the vertical pole, the number of the latch holes is greater than or equal to the number of sleeves, each sleeve is provided with a through hole matching the latch hole, and the locking of the sleeve on the axis of the vertical pole is achieved by shearing the latch inserted in the through hole and the corresponding latch hole. In specific application, it is preferably set that the number of the latch holes is greater than the number of sleeves, and the distribution of the latch holes is from one end of the vertical pole to the other end of the vertical pole, and the gap between two adjacent latch holes is less than 40 cm. In this way, the most reasonable support form for the enclosure can be selected according to the specific form of the foundation pit surface.

[0026] The enclosure plates are all hollow plate-like structures;

[0027] The enclosure plate includes an outer plate for connecting with the foundation pit and an inner plate close to the center of the foundation pit, and the outer plate is provided with a plurality of connecting holes penetrating the inner and outer sides of the outer plate;

[0028] The inner plate is provided with a drainage port which passes through the inner and outer sides of the inner plate, and the fluid conduction capacity of the drainage port is adjustable;

[0029] It also includes a water tank fixed on the inner plate, and the outlet end of the drain port is located in the water tank. In the specific application of this solution, the enclosure can be made of multiple plates. For example, according to the internal design, for the solution without a filter screen, 6 plates can be welded. For the solution including a filter screen and requiring maintenance of the filter screen, one of the plates is bolted to the plate connected to it. The inner plate of the enclosure is attached to the wall of the foundation pit, so that the enclosure is used as a retaining wall of the foundation pit.

[0030] Specifically, the enclosure is configured to include a connecting hole arranged on the outer plate, a drainage outlet arranged on the inner plate, and a water trough arranged on the inner plate. When used specifically, this solution provides a solution for using the enclosure as a drainage solution for the side walls of the foundation pit, targeting the characteristics of sandy gravel formations that are not easy to achieve precipitation by well point precipitation: water seeping out from the side walls of the foundation pit enters the interior of the enclosure through the connecting hole, and then converges into the water trough through the drainage outlet, so as to achieve the purpose of safely and conveniently achieving the precipitation of the foundation pit while providing support for the side walls of the foundation pit.

[0031] At the same time, this scheme takes into account the looseness of the sand and gravel stratum itself, and arranges the fluid conductivity of the drainage outlet to be adjustable, aiming to, for example, according to the needs of foundation pit excavation, on the premise of being able to achieve precipitation during foundation pit excavation, draw out as little water as possible through the drainage outlet, so as to reduce the impact of foundation pit construction on the groundwater level, reduce the possibility of foundation pit construction causing excessively large holes around the foundation pit, and achieve safe precipitation or drainage.

[0032] As a specific solution for adjusting the fluid conductivity of a drain outlet, it is set as follows: the number of the drain outlets is multiple, and the blocking state of some or all of the drain outlets is adjustable. This solution forms a water flow adjustment of the coaming through multiple drain outlets, and the specific adjustment method is to block some of the drain outlets. In specific application, if the foundation pit drainage does not meet the safety requirements, the state of blocking all the drain outlets as above can be adopted.

[0033] In the specific implementation of this scheme, in order to achieve the multi-gradient adjustable drainage flow of the enclosure through the drainage outlet, it is preferably set to have as many drainage outlets as possible. At the same time, considering the water conduction capacity of the outer plate of the enclosure to the edge of the foundation pit, to avoid the concentrated water conduction causing the local holes of the foundation pit to be too large and the impact of the foundation pit excavation on the bottom layer to be expanded, it is preferably adopted that the connecting holes are evenly distributed on the entire surface of the outer plate. As a drainage outlet blocking solution, it is set as follows: it also includes a filter screen arranged in the hollow space of the enclosure, and in the plate thickness direction of the enclosure, the filter screen divides the hollow space into an outer cavity and an inner cavity, the outer cavity is the cavity between the filter screen and the outer plate, and the inner cavity is the cavity between the filter screen and the inner plate;

[0034] It also includes a mud discharge port connected to the bottom side of the enclosure, with the inlet end connected to the inner cavity;

[0035] It also includes a water injection port connected to the enclosure, with the outlet end connected to the inner cavity;

[0036] The mud discharge port and water injection port are both provided with a cut-off device for controlling their respective on-off states. In this scheme, the filter net is used as a filtering component between the connecting hole and the drain port to avoid the drain port being blocked due to the introduction of sand, mud, etc. into the enclosure in a short period of time due to the large number of connecting holes; it is configured to include the mud discharge port and the water injection port, aiming to achieve: regularly or when necessary, inject cleaning water through the water injection port to clean the outer cavity, and then discharge it from the mud discharge port; it is configured to also include a cut-off device, aiming to achieve the cut-off of the mud discharge port when it is not necessary, and the fluid is only enriched in the water tank and pumped out by a general pump body; the position limitation of the above mud discharge port and water injection port is intended to cover the entire filtering surface of the filter net as much as possible through the above cleaning water; the setting of the above cut-off device is not only intended to achieve the above flow limiting purpose, but also to use the outer cavity as a temporary storage space for sand and mud entering the enclosure, such as using the sand and mud accumulated in the outer cavity at a certain time interval to judge the impact of the precipitation flow on the safety of the formation at this time.

[0037] As a technical solution to solve the blockage of the connecting hole by introducing pressurized gas into the hollow space of the enclosure when each drain outlet is closed and the cut-off device is turned off, it is configured as follows: each drain outlet is matched with a plug, and also includes a connecting pipe connected to the enclosure, and the outlet end of which is connected to the hollow space.

[0038] As a technical solution to facilitate the installation and cleaning and maintenance of the filter during use: the connection between the filter and the enclosure is achieved in the following manner: the remaining four faces of the enclosure are the upper end face, the lower end face, the left end face and the right end face, and any one of the remaining four faces is bolted to the enclosure;

[0039] Two chute grooves in a positive relationship are arranged on the wall surface of the hollow space of the enclosure, and the filter screen is clamped in the hollow space through the chute grooves;

[0040] The starting end of the chute is directly opposite to the surface connected to the enclosure by bolts. With this solution, after the surface connected to the enclosure by bolts is disassembled, the filter screen can be disassembled or installed by pulling and inserting operations.

[0041] In order to reduce the design of the structural strength or rigidity of the filter net so as to realize the lightweight design of the filter net and facilitate the corresponding operation of the filter net, the design is as follows: it also includes a support plate arranged in the inner cavity, and the filter net is supported on the support plate as the surface of the inner cavity boundary.

[0042] As a technical solution to facilitate the restraint of the enclosure plate at the edge of the foundation pit, it is set as follows: the cross bar includes a threaded barrel and a threaded rod connected in series, the threaded barrel is threadedly connected to the threaded rod and is coaxial, the threaded barrel is connected to the vertical rod, and a pad is further provided between the end of the threaded rod and the inner side of the enclosure plate;

[0043] The backing plate includes: a first plate body which is a steel plate, a second plate body which is a plastic plate or a graphite plate, and a third plate body which is a steel plate, wherein the first plate body is fixedly connected to the threaded rod, the second plate body is clamped between the first plate body and the third plate body, and the outer side of the third plate body is in contact with the inner side of the enclosure plate. This solution has a simple structure, and the second plate body serves as a wear-reducing plate between the first plate body and the third plate body, so as to facilitate the relative rotation of the first plate body and the third plate body.

[0044] The present invention also discloses a method for anti-destruction reinforcement of geotechnical engineering, which is based on the mechanism described in any one of the above items and is implemented by the following steps:

[0045] S1. Complete the installation of all sleeves on the vertical poles, and the sleeves are stacked at the bottom of the vertical poles;

[0046] Complete the installation of the enclosure on both sides of the support frame, and make the enclosure fit against the side of the foundation pit;

[0047] Complete the installation of the lifting ring on the top of the pole;

[0048] S2. Adjust the length of the cross bars on both sides of the bottom sleeve so that both ends of the cross bars form a supporting relationship with the corresponding side panels;

[0049] S3, using the lifting tool hung on the lifting ring, lift the crossbar on the upper sleeve of the lowest sleeve in turn, so that the corresponding sleeve moves with the crossbar on it to the required position of the vertical pole axis;

[0050] The specific lifting is as follows: the top sleeve is lifted first and after the axis position is determined, the corresponding side panels are constrained by adjusting the length of the crossbar, and then fixed to the vertical pole by the corresponding locking device. Then, in the arrangement order of the sleeves, the position adjustment of each sleeve on the vertical pole, the adjustment of the length of the crossbar to constrain the panels and the position fixation on the vertical pole are completed from top to bottom. As mentioned above, by adopting this scheme, a safe and reliable geotechnical engineering anti-destruction slope reinforcement scheme can be obtained under economic and reasonable conditions.

[0051] Regarding the above application of the water filtering function enclosure, in specific use: the following methods can be used to complete the installation and use of this mechanism:

[0052] D1. Install a steel mesh on the wall of the excavated foundation pit as the internal steel structure skeleton of the concrete wall;

[0053] D2. Arrange multiple grouting pipes on the outer wall of the steel mesh. The grouting pipes are arranged at intervals. The gaps between adjacent grouting pipes serve as fluid flow channels between the inlet ends of the communicating holes and the steel mesh. Multiple grouting holes are arranged along the axis of the grouting pipes, and the openings of the grouting holes face the steel mesh.

[0054] D3. The erection of the enclosure is completed, and the outer wall of the outer plate is in contact with the grouting pipe;

[0055] D4. During the excavation and construction of the foundation pit, the enclosure is used as a retaining drainage wall to discharge water from the side of the foundation pit, and the drainage flow rate is controlled by adjusting the fluid conductivity of the drainage outlet;

[0056] D5. After the excavation and construction of the foundation pit are completed, the grouting pipe is used to inject concrete or slurry into the steel mesh, and the enclosure is used as a supporting formwork during the curing process of the concrete or slurry. The above-mentioned method for anti-destruction reinforcement of geotechnical engineering is located in the above step D3. The above method provides a technical solution involving foundation pit drainage and long-term support settings for the foundation pit during the foundation pit construction process: specifically, steps D1 to D3 are to complete the installation of basic equipment, step D4 is to use the mechanism to achieve foundation pit dewatering, and step D5 is to form long-term support as a long-term retaining wall and water blocking layer. To form the above long-term support, the present mechanism and the provided method are used, which are different from the prior art. During the dewatering process, the sand and gravel strata are prone to form cavities near the outer plate of the enclosure due to dewatering. By using the grouting pipe, the cavities can be filled with mortar to facilitate the stability of the strata around the foundation pit. At the same time, this solution provides a technical solution that can not only achieve foundation pit dewatering, but also realize the multi-purpose of the mechanism.

[0057] The present invention has the following beneficial effects:

[0058] In the specific structural design, it is set as follows: the enclosure is composed of two pieces and distributed on a pair of opposite sides of the support frame. Regarding the force on the vertical pole, since the thrust directions of the cross bars from different sides are opposite, the assembly composed of the sleeve and the cross bar can effectively optimize the force on the vertical pole and improve the stability of the support frame.

[0059] The sleeve is arranged to slide along the axis of the vertical pole, and a detachable lifting ring is also arranged at the upper end of the vertical pole, so as to facilitate the erection operation of the mechanism through the method provided by the scheme, and obtain a safe and reliable anti-destruction slope reinforcement scheme for geotechnical engineering under the condition of economic rationality and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 It is a side view of a specific embodiment of the mechanism for anti-destruction reinforcement of geotechnical engineering according to the present invention;

[0061] Figure 2It is a partial schematic diagram of a specific embodiment of the mechanism for anti-destruction reinforcement of geotechnical engineering described in the present invention, and the schematic diagram is used to reflect the structural composition of the enclosure part.

[0062] The reference numerals in the figure are: 1. enclosure, 2. cross bar, 3. vertical bar, 4. threaded tube, 5. threaded rod, 6. pad, 7. mud discharge port, 8. connecting pipe, 9. water injection port, 10. grouting pipe, 11. steel mesh, 12. water tank, 13. drain outlet, 14. plug, 15. connecting hole, 16. filter screen, 17. support plate, 18. lifting ring, 19. pin hole, 20. sleeve. DETAILED DESCRIPTION

[0063] The present invention will be further described in detail below in conjunction with the embodiments, but the structure of the present invention is not limited to the following embodiments.

[0064] Embodiment 1:

[0065] like Figure 1 and Figure 2 As shown, the mechanism for anti-destruction reinforcement of geotechnical engineering includes a foundation pit support assembly, wherein the foundation pit support assembly includes two panels 1 and a support frame for supporting the panels 1, wherein the two panels 1 are distributed on a pair of opposite sides of the support frame;

[0066] The support frame includes a vertical pole 3 and a plurality of cross bars 2 arranged along the axis direction of the vertical pole 3. The cross bars 2 serve as support members between the vertical pole 3 and the inner side of the enclosure 1. The support frame also includes a sleeve 20 sleeved on the vertical pole 3 and capable of sliding along the axis of the vertical pole 3. Two cross bars 2 are fixed on each sleeve 20, and the cross bars 2 on each sleeve 20 are linearly symmetrical with respect to the axis of the sleeve 20.

[0067] The length of the crossbar 2 is adjustable;

[0068] It also includes a lifting ring 18 arranged on the top of the vertical pole 3, the downward projection of the lifting ring 18 falls on the cross bar 2, and the axis of the lifting ring 18 is colinear with the axis of the vertical pole 3;

[0069] A locking device is provided between each sleeve 20 and the vertical rod 3 for locking the position of the sleeve 20 on the axis of the vertical rod 3;

[0070] The hanging ring 18 is detachably connected to the upright pole 3 .

[0071] This scheme provides a technical solution that is beneficial to the risk control of foundation pit construction in sand and gravel formations, as sand and gravel formations are usually rich in water and very prone to collapse.

[0072] When in use, the enclosure 1 is attached to the edge of the foundation pit to form a temporary support for the foundation pit, and the support frame is used to provide thrust for the enclosure 1 so that the enclosure 1 can fit well to the edge of the foundation pit.

[0073] In the specific structural design, it is set as follows: the enclosure 1 is composed of two pieces and distributed on a pair of opposite sides of the support frame. Regarding the force on the vertical pole 3, since the thrust directions of the cross bars 2 from different sides are opposite, the assembly composed of the sleeve 20 and the cross bar 2 can effectively optimize the force on the vertical pole 3 and improve the stability of the support frame.

[0074] The sleeve 20 is arranged to slide along the axis of the vertical pole 3, and a detachable lifting ring 18 is arranged on the upper end of the vertical pole 3, so as to obtain a safe and reliable anti-destruction slope reinforcement scheme for geotechnical engineering under the condition of economic rationality and easy operation through the following operations:

[0075] S1, complete the installation of all sleeves 20 on the vertical pole 3, and the sleeves 20 are stacked at the bottom of the vertical pole 3;

[0076] Complete the installation of the enclosure 1 on both sides of the support frame, and make the enclosure 1 close to the side of the foundation pit;

[0077] Complete the installation of the lifting ring 18 on the top of the vertical pole 3;

[0078] S2, adjusting the length of the cross bars 2 on both sides of the bottom sleeve 20 so that both ends of the cross bars 2 form a supporting relationship with the corresponding side panels 1;

[0079] S3, using the lifting tool hung on the lifting ring 18, sequentially lift the crossbar 2 on the upper sleeve 20 of the lowest sleeve 20, so that the corresponding sleeve 20 moves with the crossbar 2 thereon to the desired axis position of the vertical pole 3;

[0080] The specific lifting is as follows: the top sleeve 20 is lifted first and after the axis position is determined, the length of the cross bar 2 is adjusted to constrain the corresponding side panel 1, and then one of them is fixed on the vertical pole 3 through the corresponding locking device. Then, in the arrangement order of the sleeves 20, the position adjustment of each sleeve 20 on the vertical pole 3, the length of the cross bar 2 is adjusted to constrain the panel 1 and the position is fixed on the vertical pole 3 from top to bottom.

[0081] The lifting ring 18 is detachable, so that the vertical pole 3 can be erected at the installation position in the form of a bare pole first, and then the sleeves 20 are installed from the upper end of the vertical pole 3, and then the lifting ring 18 is installed to provide a lifting point at the top of the vertical pole 3 for each sleeve 20.

[0082] In the specific structural limitations and operating methods, the cross bar 2 on the lowest sleeve 20 can be used to utilize the enclosure 1 to form an anti-falling constraint for the supporting state of the vertical pole 3. In this way, when the subsequent sleeve 20 is lifted, the vertical pole 3 can be in a relatively stable state until the position adjustment of all sleeves 20 is completed. For example, a hand hoist or an electric hoist can be used to lift the combination of the sleeve 20 and the cross bar 2, thereby realizing the anti-falling constraint of the vertical pole 3 and completing the subsequent lifting, which is easy to operate and economical.

[0083] As a technical solution with high locking reliability and easy locking, it is set as follows: the locking device includes a plurality of latch holes 19 arranged on the vertical pole 3 and arranged in sequence along the axis of the vertical pole 3, the number of the latch holes 19 is greater than or equal to the number of sleeves 20, each sleeve 20 is provided with a through hole matching the latch hole 19, and the locking of the sleeve 20 on the axis of the vertical pole 3 is achieved by shearing the latch inserted in the through hole and the corresponding latch hole 19. In specific use, it is preferably set that the number of the latch holes 19 is greater than the number of sleeves 20, and the distribution of the latch holes 19 is from one end of the vertical pole 3 to the other end of the vertical pole 3, and the gap between two adjacent latch holes 19 is less than 40 cm. In this way, the most reasonable support form for the enclosure 1 can be selected according to the specific form of the foundation pit surface.

[0084] Embodiment 2:

[0085] like Figure 1 and Figure 2 As shown, this embodiment is further limited on the basis of embodiment 1:

[0086] The enclosure 1 is a hollow plate-like structure;

[0087] The enclosure 1 includes an outer plate for connecting with the foundation pit and an inner plate close to the center of the foundation pit, and the outer plate is provided with a plurality of connecting holes 15 penetrating the inner and outer sides of the outer plate;

[0088] The inner plate is provided with a drain port 13 penetrating the inner and outer sides of the inner plate, and the fluid conduction capacity of the drain port 13 is adjustable;

[0089] It also includes a water tank 12 fixed to the inner plate, and the outlet end of the drain port 13 is located in the water tank 12. In the specific application of this solution, the enclosure 1 can be made of multiple plates. For example, according to the internal design, for the solution without the filter 16, 6 plates can be welded. For the solution including the filter 16 and requiring maintenance of the filter 16, one of the plates is bolted to the plate connected to it. The inner plate of the enclosure 1 is attached to the wall of the foundation pit, so that the enclosure 1 is used as a retaining wall of the foundation pit.

[0090] Specifically, the enclosure 1 is configured to include a connecting hole 15 provided on the outer plate, a drain port 13 provided on the inner plate, and a water trough 12 provided on the inner plate. When used specifically, this solution provides a solution for using the enclosure 1 as drainage for the side walls of the foundation pit, targeting the characteristics of sandy gravel formations that are not easy to achieve precipitation by well point precipitation: water seeping out from the side walls of the foundation pit enters the interior of the enclosure 1 through the connecting hole 15, and then converges into the water trough 12 through the drain port 13, so as to achieve the purpose of safely and conveniently achieving precipitation of the foundation pit while providing support for the side walls of the foundation pit.

[0091] At the same time, this solution takes into account the looseness of the sand and gravel stratum itself, and is designed to have an adjustable fluid conductivity of the drain outlet 13, aiming to, for example, according to the needs of foundation pit excavation, on the premise of being able to achieve precipitation during foundation pit excavation, draw out as little water as possible through the drain outlet 13, so as to reduce the impact of foundation pit construction on the groundwater level, reduce the possibility of foundation pit construction causing excessively large holes around the foundation pit, and achieve safe precipitation or drainage.

[0092] As a specific solution in which the fluid conductivity of the drain outlet 13 is adjustable, it is set as follows: the number of the drain outlets 13 is multiple, and the blocking state of some or all of the drain outlets 13 is adjustable. This solution forms water flow regulation of the enclosure 1 through multiple drain outlets 13, and the specific adjustment method adopts the method of blocking some of the drain outlets 13. In specific application, if the foundation pit drainage does not meet the safety requirements, the state of all the drain outlets 13 being blocked as above can be adopted.

[0093] In the specific implementation of this scheme, in order to achieve the multi-gradient adjustable drainage flow of the enclosure 1 through the drainage port 13, it is preferably set to have as many drainage ports 13 as possible. At the same time, considering the water conduction capacity of the outer plate of the enclosure 1 to the edge of the foundation pit, to avoid the concentrated water conduction causing the local holes of the foundation pit to be too large and the impact of the foundation pit excavation on the bottom layer to be expanded, it is preferably adopted that the connecting holes 15 are evenly distributed on the entire surface of the outer plate as a solution for preventing the drainage port 13 from being blocked, and it is set as follows: it also includes a filter screen 16 arranged in the hollow space of the enclosure 1, and in the plate thickness direction of the enclosure 1, the filter screen 16 divides the hollow space into an outer cavity and an inner cavity, the outer cavity is the cavity between the filter screen 16 and the outer plate, and the inner cavity is the cavity between the filter screen 16 and the inner plate;

[0094] It also includes a mud discharge port 7 connected to the bottom side of the enclosure 1, with the inlet end connected to the inner cavity;

[0095] It also includes a water injection port 9 connected to the enclosure 1, with the outlet end connected to the inner cavity;

[0096] The mud outlet 7 and the water injection port 9 are both provided with a cut-off device for controlling the on-off state of each. In this scheme, the filter screen 16 is used as a filtering component between the connecting hole 15 and the drain port 13 to prevent the drain port 13 from being blocked due to the large number of connecting holes 15 and the introduction of sand, mud, etc. into the enclosure 1 in a short period of time; the mud outlet 7 and the water injection port 9 are provided to achieve: regularly or when necessary, the cleaning water is injected through the water injection port 9 to clean the outer cavity, and then discharged from the mud outlet 7; the cut-off device is provided to achieve the cut-off of the mud outlet 7 when it is not necessary, and the fluid is only enriched in the water tank 12 and pumped out by a general pump body; the position of the mud outlet 7 and the water injection port 9 is limited to cover the entire filtering surface of the filter screen 16 as much as possible through the cleaning water; the setting of the cut-off device is not only intended to achieve the above flow limit purpose, but also to use the outer cavity as a temporary storage space for sand and mud entering the enclosure 1, such as using the sand and mud accumulated in the outer cavity at a certain time interval to judge the impact of the precipitation flow on the safety of the formation.

[0097] As a technical solution for solving the blockage of the connecting hole 15 by introducing pressurized gas into the hollow space of the enclosure 1 when each drain outlet 13 is closed and the shut-off device is turned off, it is configured as follows: each drain outlet 13 is matched with a plug 14, and also includes a connecting pipe 8 connected to the enclosure 1, and the outlet end of which is connected to the hollow space.

[0098] As a technical solution to facilitate the installation and cleaning and maintenance of the filter 16 during use: the connection between the filter 16 and the enclosure 1 is achieved in the following manner: the remaining four faces of the enclosure 1 are the upper end face, the lower end face, the left end face and the right end face, and any one of the remaining four faces is bolted to the enclosure 1;

[0099] Two chute grooves in a positive relationship are arranged on the wall surface of the hollow space of the enclosure 1, and the filter screen 16 is clamped in the hollow space through the chute grooves;

[0100] The starting end of the chute is directly opposite to the surface bolted to the enclosure 1. With this solution, after the surface bolted to the enclosure 1 is detached, the filter 16 can be disassembled or installed by pulling and inserting operations.

[0101] In order to reduce the design of the structural strength or rigidity of the filter 16 so as to realize the lightweight design of the filter 16 and facilitate the corresponding operation of the filter 16, the design is as follows: it also includes a support plate 17 arranged in the inner cavity, and the filter 16 is supported on the support plate 17 as the surface of the inner cavity boundary.

[0102] As a technical solution to facilitate the restraint of the enclosure 1 at the edge of the foundation pit, it is set as follows: the cross bar 2 includes a threaded tube 4 and a threaded rod 5 connected in series, the threaded tube 4 is threadedly connected with the threaded rod 5 and is coaxial, the threaded tube 4 is connected to the vertical rod 3, and a pad 6 is further provided between the end of the threaded rod 5 and the inner side of the enclosure 1;

[0103] The pad 6 includes: a first plate body which is a steel plate, a second plate body which is a plastic plate or a graphite plate, and a third plate body which is a steel plate, wherein the first plate body is fixedly connected to the threaded rod 5, the second plate body is clamped between the first plate body and the third plate body, and the outer side of the third plate body is in contact with the inner side of the enclosure 1. This solution has a simple structure, and the second plate body serves as a wear-reducing plate between the first plate body and the third plate body, so as to facilitate the relative rotation of the first plate body and the third plate body.

[0104] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific embodiments of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments obtained without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanism for anti-destruction reinforcement of geotechnical engineering, comprising a foundation pit support assembly, wherein the foundation pit support assembly comprises two enclosure plates (1) and a support frame for supporting the enclosure plates (1), wherein the two enclosure plates (1) are distributed on a pair of opposite sides of the support frame; The support frame comprises a vertical pole (3) and a plurality of horizontal poles (2) arranged along the axis direction of the vertical pole (3), wherein the horizontal pole (2) serves as a support member between the vertical pole (3) and the inner side of the enclosure (1). It is characterized in that It also includes a sleeve (20) sleeved on the vertical pole (3) and capable of sliding along the axis of the vertical pole (3), each sleeve (20) being fixed with two cross bars (2), and the cross bars (2) on each sleeve (20) are linearly symmetrical with respect to the axis of the sleeve (20); The length of the crossbar (2) is adjustable; It also includes a lifting ring (18) arranged on the top of the vertical pole (3), wherein the downward projection of the lifting ring (18) falls on the crossbar (2), and the axis of the lifting ring (18) is colinear with the axis of the vertical pole (3); A locking device for locking the position of the sleeve (20) on the axis of the upright pole (3) is provided between each sleeve (20) and the upright pole (3); The lifting ring (18) is detachably connected to the vertical pole (3); The enclosure plates (1) are all hollow plate-like structures; The enclosure plate (1) comprises an outer plate for connecting with the foundation pit and an inner plate close to the center of the foundation pit, wherein the outer plate is provided with a plurality of connecting holes (15) penetrating the inner and outer sides of the outer plate; The inner plate is provided with a drainage port (13) penetrating the inner and outer sides of the inner plate, and the fluid conduction capacity of the drainage port (13) is adjustable; It also includes a water tank (12) fixed to the inner side plate, and the outlet end of the drain port (13) is located in the water tank (12); It also includes a filter screen (16) arranged in the hollow space of the enclosure plate (1), wherein in the plate thickness direction of the enclosure plate (1), the filter screen (16) divides the hollow space into an outer cavity and an inner cavity, the outer cavity being the cavity between the filter screen (16) and the outer plate, and the inner cavity being the cavity between the filter screen (16) and the inner plate; It also includes a mud discharge port (7) connected to the bottom side of the enclosure (1) and having an inlet end connected to the inner cavity; It also includes a water injection port (9) connected to the enclosure (1) and having an outlet end connected to the inner cavity; The mud discharge port (7) and the water injection port (9) are both provided with a cut-off device for controlling the on-off state of each. The cross bar (2) comprises a threaded tube (4) and a threaded rod (5) connected in series, the threaded tube (4) and the threaded rod (5) being threadedly connected and coaxial, the threaded tube (4) being connected to the vertical rod (3), and a pad (6) being provided between the end of the threaded rod (5) and the inner side of the enclosure (1).

2. The mechanism for anti-destruction reinforcement of geotechnical engineering according to claim 1, It is characterized in that The locking device comprises a plurality of latch holes (19) arranged on the vertical rod (3) and arranged in sequence along the axis of the vertical rod (3); the number of the latch holes (19) is greater than or equal to the number of the sleeves (20); each sleeve (20) is provided with a through hole matching the latch hole (19); the locking of the position of the sleeve (20) on the axis of the vertical rod (3) is achieved by shearing a latch pin inserted in the through hole and the corresponding latch hole (19).

3. The mechanism for anti-destruction reinforcement of geotechnical engineering according to claim 1, It is characterized in that Each drainage outlet (13) is matched with a plug (14), and also includes a connecting pipe (8) connected to the enclosure (1) and having an outlet end communicating with the hollow space.

4. The mechanism for anti-destruction reinforcement of geotechnical engineering according to claim 1, It is characterized in that The connection between the filter screen (16) and the enclosure (1) is achieved in the following manner: the remaining four faces of the enclosure (1) are respectively an upper end face, a lower end face, a left end face and a right end face, and any one of the remaining four faces is bolted to the enclosure (1); Two slide grooves in a positively opposed relationship are arranged on the wall surface of the hollow space of the enclosure (1), and the filter screen (16) is clamped in the hollow space through the slide grooves; The starting end of the slide groove faces the surface of the enclosure plate (1) that is bolted thereto.

5. The mechanism for anti-destruction reinforcement of geotechnical engineering according to claim 1, It is characterized in that It also includes a support plate (17) arranged in the inner cavity, and the filter screen (16) is supported on the support plate (17) as a surface of the inner cavity boundary.

6. The mechanism for anti-destruction reinforcement of geotechnical engineering according to claim 1, It is characterized in that The pad (6) comprises: a first plate body which is a steel plate, a second plate body which is a plastic plate or a graphite plate, and a third plate body which is a steel plate, the first plate body being fixedly connected to the threaded rod (5), the second plate body being clamped between the first plate body and the third plate body, and the outer side of the third plate body being in contact with the inner side of the enclosure (1).

7. The mechanism for anti-destruction reinforcement of geotechnical engineering according to claim 1, It is characterized in that The number of the drainage openings (13) is plural, and the blocking state of some or all of the drainage openings (13) is adjustable.

8. Methods for anti-destruction reinforcement of geotechnical engineering, It is characterized in that The method is based on the mechanism described in any one of claims 1 to 7, and the method is implemented by the following steps: S1, completing the installation of all sleeves (20) on the vertical pole (3), and the sleeves (20) are stacked on the bottom of the vertical pole (3); Complete the installation of the enclosure (1) on both sides of the support frame, and make the enclosure (1) abut against the side of the foundation pit; Complete the installation of the lifting ring (18) on the top of the vertical pole (3); S2, adjusting the length of the cross bars (2) on both sides of the bottom sleeve (20) so that both ends of the cross bars (2) form a supporting relationship with the corresponding side panels (1); S3, using a lifting tool hung on the lifting ring (18), sequentially lifting the crossbar (2) on the upper sleeve (20) of the lowest sleeve (20), so that the corresponding sleeve (20) moves along with the crossbar (2) thereon to the desired axis position of the vertical pole (3); The specific lifting process is as follows: the top sleeve (20) is lifted first and after the axis position is determined, the length of the cross bar (2) is adjusted to constrain the corresponding side panel (1), and then fixed to one of the vertical poles (3) through the corresponding locking device. Then, in the arrangement order of the sleeves (20), the position of each sleeve (20) on the vertical pole (3) is adjusted, the length of the cross bar (2) is adjusted to constrain the panel (1), and the position is fixed on the vertical pole (3) from top to bottom.

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