CN111827305A - Mechanism and method for anti-destruction reinforcement of geotechnical engineering - Google Patents

Abstract

The 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 enclosure plates, and a support frame, the support frame includes a vertical A rod and a plurality of cross rods, and also include a sleeve sleeved on the vertical rod and capable of sliding along the axis of the vertical rod, two cross rods are fixed on each sleeve, and the cross rods on each sleeve are opposite to each other. The axis of the sleeve is line-symmetrical; the length of the cross bar is adjustable; it also includes a lifting ring arranged on the top of the vertical rod, the downward projection of the hanging ring falls on the horizontal rod, and the axis of the hanging ring is the same as the axis of the vertical rod. A locking device for locking the position of the sleeve on the axis of the vertical rod is arranged between each sleeve and the vertical rod; the lifting ring is detachably connected to the vertical rod. The method is a geotechnical engineering reinforcement method based on the mechanism, and by adopting the mechanism and method provided by this scheme, a safe and reliable reinforcement scheme for geotechnical engineering failure-resistant slopes can be obtained under economical and reasonable conditions.

Description

Mechanism and method for anti-destruction reinforcement of geotechnical engineering

technical field

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

Background technique

The foundation pit generally refers to the soil pit excavated at the base design position of the building according to the base elevation of the building and the size of the base plane. For foundation pit construction, the foundation pit support mechanism is used as a temporary structure and a safety protection structure to prevent collapse during the construction of the foundation pit. At the same time, during the excavation and construction of the foundation pit, the problem of precipitation of the foundation pit needs to be considered.

Sand pebble geology is generally loose and water-rich. In the construction of foundation pits with water-rich sand and pebble strata close to important buildings, special attention should be paid to the impact of stratum precipitation on the surrounding environment. Therefore, in the existing construction, for the deep foundation pit in the sand egg stratum (excavation depth is more than 5 meters (including 5 meters), or the depth is not more than 5 meters, but the geological conditions and surrounding environment and underground pipelines are particularly complex foundation pit engineering. ) There are a series of problems in the construction process, such as difficult construction and great impact on the surrounding environment.

For high slope or deep foundation pit support schemes with specific engineering geological conditions, surrounding environment and resource constraints, there are few practical methods on how to choose a safe, reliable, economical, reasonable, environmentally friendly and low-carbon scheme.

SUMMARY OF THE INVENTION

In view of the above-mentioned support schemes for high slopes or deep foundation pits based on specific engineering geological conditions, surrounding environment and resource constraints, there are few practical methods on how to choose a safe, reliable, economical, reasonable, environmentally friendly and low-carbon scheme. Technical problem, 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 can be obtained under economical and reasonable conditions. reinforcement plan.

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, and the foundation pit support assembly includes two shrouds, further comprising a support frame for supporting the shroud, and the two shrouds are distributed on a pair of opposite sides of the support frame;

The support frame includes a vertical rod and a plurality of cross rods arranged along the axis direction of the vertical rod. Two cross bars are fixed on each sleeve, and the cross bars on each sleeve are line-symmetrical with respect to the axis of the sleeve;

The length of the cross bar is adjustable;

It also includes a hoist ring arranged on the top of the vertical pole, the downward projection of the hoist ring falls on the cross bar, and the axis of the hoist ring is collinear with the axis of the vertical pole;

A locking device for locking the position of the sleeve on the axis of the vertical rod is arranged between each sleeve and the vertical rod;

The lifting ring is detachably connected to the vertical pole.

This scheme provides a technical scheme that is beneficial to the risk control of the construction of foundation pits in sand egg strata because of the water-rich characteristics usually accompanied by sand egg strata and the characteristics of easy collapse during the construction of foundation pits such as sand egg strata.

The enclosure plate is attached to the edge of the foundation pit during use to form temporary support for the foundation pit, and the support frame is used to provide thrust for the enclosure plate, so that the enclosure plate can be well fitted to the edge of the foundation pit .

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. For the force of the vertical rod, since the thrust directions from the cross rods on different sides are opposite, the sleeves and the cross rods are in the opposite direction. The assembled assembly can effectively optimize the force of the pole and improve the stability of the support frame.

It is arranged that the sleeve can slide along the axis of the vertical pole, and the upper end of the vertical pole is also provided with a detachable lifting ring, which is convenient for the following operations to obtain safe and reliable geotechnical engineering damage resistance under the condition of economical, reasonable and easy operation. Slope reinforcement scheme:

S1. Complete the sleeves of all sleeves on the poles, and the sleeves are stacked on the bottom of the poles;

Complete the installation of the enclosure plate on both sides of the support frame, and make the enclosure plate adhere to the side of the foundation pit;

Complete the installation of the lifting ring on the top of the pole;

S2. Adjust the lengths of the crossbars on both sides of the lowermost sleeve, so that both ends of the crossbar form a supporting relationship with the corresponding side wall;

S3. Use the hoisting tool hung on the hoisting ring to hoist the crossbar on the upper sleeve of the lowermost sleeve in turn, so that the corresponding sleeve moves to the required vertical rod axis position along with the crossbar on it;

The specific lifting is as follows: the uppermost sleeve is the first to be lifted and the position of the axis is determined. After adjusting the length of the crossbar to constrain the corresponding side wall, the corresponding locking device is used to complete the one that is fixed on the vertical rod, and then, In terms of the arrangement sequence of the sleeves, the position adjustment of each sleeve on the vertical rod, the adjustment of the length of the cross rod to constrain the enclosure plate and the fixed position on the vertical rod are completed sequentially from top to bottom.

The lifting ring is detachable, so that the vertical rod can be erected at the installation position first in the form of a polished rod, and then the sleeves are set up by the upper end of the vertical rod, and then the lifting ring is installed to provide each sleeve with The hanging point at the top of the pole.

In the specific structure limitation and operation mode, the use of the horizontal bar on the lowermost sleeve can realize the use of the enclosure plate to form an anti-fall constraint for the support state of the vertical bar. In this way, when the subsequent sleeve is hoisted, the vertical The rod is in a relatively stable state until all sleeve position adjustments are completed, such as the use of chain hoists and electric hoists to complete the lifting of the combination of the sleeve and the cross bar, to achieve the anti-fall restraint of the vertical pole and complete the subsequent hoisting. Easy to operate and economical.

As a further technical solution of the said mechanism is:

As a technical solution with high locking reliability and easy locking, the locking device includes a plurality of latch holes arranged on the upright pole and arranged in sequence along the axis of the upright pole. The number is greater than or equal to the number of sleeves, each sleeve is provided with a through hole matching the plug hole, and the position of the sleeve on the axis of the vertical rod is locked by inserting the through hole and the corresponding plug hole. The latch is realized by shearing. In specific application, it is preferable to set the number of the bolt holes to be more than the number of sleeves, and the distribution of the bolt holes starts from one end of the vertical rod and ends at the other end of the vertical rod, and the gap between the two adjacent bolt holes is less than 40cm, in this way, the most reasonable support form for the hoarding can be selected according to the specific form of the foundation pit surface.

The enclosure plate is a hollow plate-like structure;

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 communication holes penetrating the inner and outer sides of the outer plate;

The inner side plate is provided with a drainage port penetrating the inner side and the outer side of the inner side panel, and the fluid conduction capacity of the drainage port is adjustable;

It also includes a water tank fixed on the inner side panel, and the outlet end of the water outlet is located in the water tank. In the specific application of this scheme, the hoarding plate can be spliced by multiple plates. For example, according to the internal design, for the scheme without filter screen, 6 flat plates can be used for welding. The scheme is set as one of the plates is bolted to the connecting plate, etc. The inner side plate of the enclosure plate is attached to the wall of the foundation pit, so that the enclosure plate can be used as the retaining wall of the foundation pit.

Specifically, it is arranged that the enclosure plate includes a communication hole arranged on the outer plate, a water outlet arranged on the inner plate, and a water tank arranged on the inner plate. Using the characteristics of well point precipitation to achieve precipitation, a realization scheme of using the coaming plate as the drainage of the side wall of the foundation pit is provided: the water seeping from the side wall of the foundation pit enters the interior of the coaming plate through the communication holes, and then converges to the In the water tank, the purpose of safe and convenient dewatering of the foundation pit can be achieved under the condition of providing support for the side wall of the foundation pit.

At the same time, in consideration of the looseness of the sand egg stratum itself, the fluid conduction capacity of the drainage outlet is set to be adjustable, aiming at the premise that the excavation and dewatering in the foundation pit can be realized according to the excavation needs of the foundation pit. In order to reduce the impact of the foundation pit construction on the groundwater level, reduce the possibility of excessive holes around the foundation pit caused by the foundation pit construction, and achieve safe precipitation or drainage.

As a specific solution for the adjustable fluid conduction capacity of the drain outlet, it is set as follows: the number of the drain outlet is multiple, and the blocking state of some or all of the drain outlet is adjustable. In this scheme, a plurality of drainage ports are used to form the water outlet flow adjustment of the coaming plate, and the specific adjustment method adopts the method of blocking part of the drainage ports. In the specific application, if the drainage of the foundation pit does not meet the safety requirements, the state of all the drainage outlets as above can be adopted.

In the specific implementation of this scheme, in order to realize the multi-gradient adjustable drainage flow of the coaming plate through the drainage outlet, it is preferable to set the number of drainage outlets as much as possible. Concentrated water diversion leads to excessively large local holes in the foundation pit and enlarges the influence of the excavation of the foundation pit on the bottom layer. It is preferable to adopt the method that the communicating holes are evenly distributed on the entire surface of the outer plate. The filter screen arranged in the hollow space of the enclosure plate, in the thickness direction of the enclosure plate, the filter screen divides the hollow space into an outer cavity and an inner cavity, and the outer cavity is a filter screen and an outer plate The cavity between, the inner cavity is the cavity between the filter screen and the inner plate;

It also includes a mud discharge port connected to the bottom side of the coaming plate, and the inlet end is connected with the inner cavity;

It also includes a water injection port connected to the enclosure, and the outlet end is connected to the inner cavity;

Both the mud discharge port and the water injection port are provided with cut-off devices for controlling their respective on-off states. In this solution, the filter screen is used as the filter element between the communication hole and the drain port to avoid blockage of the drain port due to the introduction of sand, mud, etc. into the enclosure in a short time due to the large number of communication holes; The mud discharge port and the water injection port are designed to realize: regularly or when necessary, inject cleaning water through the water injection port to clean the outer cavity, and then discharge from the mud discharge port; it is arranged to further include a cut-off device, which aims to realize The mud discharge port is cut off when it is not necessary, and the fluid is only concentrated in the water tank and pumped out by the general pump body; the positions of the above mud discharge port and water injection port are limited, and the purpose is to cover the entire filter screen with the above cleaning water as much as possible. The above cut-off device is not only designed to achieve the above purpose of limiting the flow, but also can be used as a temporary storage space for sand and mud entering the coaming plate through the outer cavity. The influence of precipitation flow on formation safety at this time.

As a technical solution to solve the blockage of the communication holes by introducing pressure gas into the hollow space of the enclosure under the condition of closing the drains and shutting off the cut-off device, it is set as follows: each drain is matched with a plug, It also includes a communication pipe connected to the enclosure plate, and the outlet end communicates with the hollow space.

As a technical solution to facilitate the cleaning and maintenance of the filter screen during installation and use: the connection between the filter screen and the enclosure plate is achieved in the following ways: the remaining four surfaces of the enclosure plate are the upper end surface, the lower end surface, the left end surface and the right end respectively. surface, any one of the remaining four surfaces is bolted to the hoarding;

Two chutes in a facing relationship are provided on the wall surface of the hollow space of the enclosure plate, and the filter screen is clamped in the hollow space through the chutes;

The starting end of the chute is opposite to the surface of the shroud that is bolted to. With this solution, the removal or installation of the filter screen can be completed by pulling and inserting operations after the bolts are disconnected from the surface of the enclosure.

In order to reduce the design of the structural strength or rigidity of the filter screen, so as to realize the lightweight design of the filter screen and facilitate the corresponding operation of the filter screen, the design is as follows: a support plate arranged in the inner cavity is also included, and the filter screen is used as the inner side. The surface of the cavity boundary is supported on the support plate.

As a technical solution to facilitate the confinement of the coaming plate on the edge of the foundation pit, it is set that: the cross bar includes a threaded barrel and a threaded rod connected in series, the threaded barrel and the threaded rod are threadedly connected and coaxial, and the threaded barrel Connected with the vertical rod, a backing plate is also provided between the end of the threaded rod and the inner side of the enclosure;

The backing plate includes: a first plate body that is a steel plate, a second plate body that is a plastic plate or a graphite plate, and a third plate body that is a steel plate, the first plate body is fixedly connected with the threaded rod, the second plate body is The plate body is clamped between the first plate body and the third plate body, and the outer side of the bottom 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.

This solution also discloses a method for anti-destruction reinforcement of geotechnical engineering, the method is based on the mechanism described in any one of the above, and the method is realized by the following steps:

S1. Complete the sleeves of all sleeves on the poles, and the sleeves are stacked on the bottom of the poles;

Complete the installation of the enclosure plate on both sides of the support frame, and make the enclosure plate adhere to the side of the foundation pit;

Complete the installation of the lifting ring on the top of the pole;

S2. Adjust the lengths of the crossbars on both sides of the lowermost sleeve, so that both ends of the crossbar form a supporting relationship with the corresponding side wall;

S3. Use the hoisting tool hung on the hoisting ring to hoist the crossbar on the upper sleeve of the lowermost sleeve in turn, so that the corresponding sleeve moves to the required vertical rod axis position along with the crossbar on it;

The specific lifting is as follows: the uppermost sleeve is the first to be lifted and the position of the axis is determined. After adjusting the length of the crossbar to constrain the corresponding side wall, the corresponding locking device is used to complete the one that is fixed on the vertical rod, and then, In terms of the arrangement sequence of the sleeves, the position adjustment of each sleeve on the vertical rod, the adjustment of the length of the cross rod to constrain the enclosure plate and the fixed position on the vertical rod are completed sequentially from top to bottom. As mentioned above, with this scheme, a safe and reliable geotechnical engineering anti-damage slope reinforcement scheme can be obtained under economical and reasonable conditions.

For the use of the above, including the use of the hoarding board with water filtering function, in the specific use: the installation and use of the mechanism can be completed in the following ways:

D1. Set up a steel mesh as the internal steel structure skeleton of the concrete wall on the wall of the excavated foundation pit;

D2. Arrange a plurality of grouting pipes on the outer wall of the steel mesh, and the grouting pipes are arranged at intervals. The gap between the adjacent grouting pipes is used as the fluid flow channel between the inlet end of the communication hole and the steel mesh. The upper edge of the grouting pipe is A plurality of grouting holes are arranged on the axis, and the orifices of the grouting holes face the steel mesh;

D3. Complete the erection of the coaming plate, and the outer wall of the outer plate is attached to the grouting pipe;

D4. During the excavation and construction of the foundation pit, the coaming plate is used as the retaining and drainage wall to realize the water gushing discharge from the side of the foundation pit, and the drainage flow control is realized by adjusting the fluid conduction capacity of the drainage outlet;

D5. After the excavation and construction of the foundation pit is completed, the grouting pipe is used to inject concrete or slurry into the steel mesh, and the coaming plate is used as a support template during the curing process of the concrete or slurry. The above-mentioned method for anti-damage reinforcement of geotechnical engineering is located in the above step D3. The above method provides a technical solution involving drainage of the foundation pit and long-term support of the foundation pit during the construction of the foundation pit: specifically, steps D1 to D3 are to complete the installation of the basic equipment, and step D4 is to use the mechanism To achieve foundation pit dewatering, step D5 is to form a long-term support as a long-term retaining wall and a water blocking layer. To form the above long-term support, the mechanism and the provided method are used, which are different from the prior art. In the process of precipitation, the grouting pipe is used for the cavity close to the outer plate of the coaming plate that is easily formed by precipitation in the sand egg stratum. That is, the cavity can be filled with mortar to facilitate the stability of the formation around the foundation pit. At the same time, this solution provides a technical solution that can not only realize the dewatering of the foundation pit, but also realize the multi-purpose of the mechanism.

The present invention has the following beneficial effects:

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. For the force of the vertical rod, since the thrust directions from the cross rods on different sides are opposite, the sleeves and the cross rods are in the opposite direction. The assembled assembly can effectively optimize the force of the pole and improve the stability of the support frame.

It is arranged that the sleeve can slide along the axis of the vertical rod, and the upper end of the vertical rod is also provided with a detachable lifting ring, which is convenient to complete the mechanism erection operation by the method provided by this solution, and obtains safety in the case of economical, reasonable and easy operation. Reliable geotechnical engineering failure-resistant slope reinforcement scheme.

Description of drawings

1 is a side view of a specific embodiment of the mechanism for anti-damage reinforcement of geotechnical engineering according to the present invention;

FIG. 2 is a partial schematic diagram of a specific embodiment of the mechanism for anti-damage reinforcement of geotechnical engineering according to the present invention, and the schematic diagram is used to reflect the structural composition of the coaming plate part.

The reference signs in the figure are: 1, enclosure plate, 2, cross bar, 3, vertical rod, 4, threaded barrel, 5, threaded rod, 6, backing plate, 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 , Latch hole, 20, sleeve.

Detailed ways

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

Example 1:

As shown in FIG. 1 and FIG. 2 , the mechanism for anti-damage reinforcement of geotechnical engineering includes a foundation pit support assembly, the foundation pit support assembly includes two shrouds 1 , and also includes a support for supporting the shroud 1 Support frame, two enclosure plates 1 are distributed on a pair of opposite sides of the support frame;

The support frame includes a vertical rod 3 and a plurality of cross rods 2 arranged along the axis of the vertical rod 3. The horizontal rod 2 serves as a support between the vertical rod 3 and the inner side of the enclosure On the vertical rod 3, there are sleeves 20 that can slide along the axis of the vertical rod 3, two cross bars 2 are fixed on each sleeve 20, and the cross bars 2 on each sleeve 20 are relative to the axis of the sleeve 20 line symmetry;

The length of the cross bar 2 is adjustable;

Also includes a lifting ring 18 arranged on the top of the vertical rod 3, the downward projection of the lifting ring 18 falls on the crossbar 2, and the axis of the lifting ring 18 is collinear with the axis of the vertical rod 3;

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

The lifting ring 18 is detachably connected to the vertical pole 3 .

This scheme provides a technical scheme that is beneficial to the risk control of the construction of foundation pits in sand egg strata because of the water-rich characteristics usually accompanied by sand egg strata and the characteristics of easy collapse during the construction of foundation pits such as sand egg strata.

The enclosure plate 1 is attached to the edge of the foundation pit during use to form temporary support for the foundation pit. edge of the pit.

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

It is arranged that the sleeve 20 can slide along the axis of the vertical rod 3, and the upper end of the vertical rod 3 is also provided with a detachable lifting ring 18, which is convenient for the following operations to obtain safe and reliable rock under the condition of economical, reasonable and easy operation. Reinforcement scheme of anti-damage slope in civil engineering:

S1, complete the sleeve setting of all the sleeves 20 on the vertical rod 3, and the sleeves 20 are stacked on the bottom of the vertical rod 3;

Complete the installation of the enclosure plate 1 on both sides of the support frame, and make the enclosure plate 1 stick to the side of the foundation pit;

Complete the installation of the lifting ring 18 on the top of the pole 3;

S2, adjust the lengths of the crossbars 2 on both sides of the lowermost sleeve 20, so that both ends of the crossbar 2 form a support relationship with the corresponding side wall 1;

S3. Use the hoisting tool hung on the hoisting ring 18 to hoist the cross bar 2 on the upper sleeve 20 of the lowermost sleeve 20 in turn, so that the corresponding sleeve 20 moves with the cross bar 2 on it to the required vertical bar 3 axis positions;

The specific lifting is as follows: after the uppermost sleeve 20 is lifted first and the axis position is determined, after adjusting the length of the cross bar 2 to restrain the corresponding side wall 1, the corresponding locking device is used to complete the one fixed on the vertical rod 3. Then, in the order of the arrangement of the sleeves 20, the position adjustment of each sleeve 20 on the vertical rod 3 is completed in turn from top to bottom, and the length of the cross rod 2 is adjusted to constrain the hoarding plate 1 and the position on the vertical rod 3 fixed.

The lifting ring 18 is detachable, so that the vertical rod 3 can be erected at the installation position first in the form of a polished rod, and then the upper end of the vertical rod 3 is used to complete the setting of each sleeve 20, and then the lifting ring 18 is installed. Each sleeve 20 provides a lifting point at the top end of the pole 3 .

In the specific structure limitation and operation mode, the use of the horizontal bar 2 on the lowermost sleeve 20 can realize the use of the enclosure plate 1 to form an anti-fall constraint for the support state of the vertical bar 3. In this way, in the subsequent lifting of the sleeve 20 At this time, the vertical rod 3 can be kept in a relatively stable state until the position adjustment of all the sleeves 20 is completed. The anti-fall restraint and the completion of subsequent hoisting have the characteristics of convenient operation and good economy.

As a technical solution with high locking reliability and easy to achieve locking, it is configured that: the locking device includes 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 bolt 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 bolt hole 19, and the position of the sleeve 20 on the axis of the vertical rod 3 is locked by inserting it at the place. The through hole and the plug in the corresponding plug hole 19 are realized by shearing. In specific application, it is preferable to set the number of the bolt holes 19 more than the number of the sleeves 20, and the distribution of the bolt holes 19 starts from one end of the vertical rod 3 and ends at the other end of the vertical rod 3, and two adjacent two The gap between the pin holes 19 is less than 40 cm, so that the most reasonable form of support for the enclosure plate 1 can be selected according to the specific form of the foundation pit surface.

Example 2:

As shown in Figure 1 and Figure 2, this embodiment is further limited on the basis of Embodiment 1:

The enclosure plate 1 is a hollow plate-like structure;

The enclosure plate 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 communication holes 15 penetrating the inner and outer sides of the outer plate;

The inner side panel is provided with a drain port 13 penetrating the inner side and the outer side of the inner side panel, and the fluid conduction capacity of the drain port 13 is adjustable;

It also includes a water tank 12 fixed on the inner side panel, and the outlet end of the water outlet 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 flat plates can be welded. 16. The maintenance plan is set as one of the plates is bolted to the connecting plate, etc. The inner side plate of the enclosure plate 1 is attached to the wall of the foundation pit, so that the enclosure plate 1 can be used as a retaining wall of the foundation pit.

Specifically, it is configured that the enclosure plate 1 includes a communication hole 15 arranged on the outer plate, a water outlet 13 arranged on the inner plate, and a water tank 12 arranged on the inner plate. If the egg stratum is not easy to use the well point precipitation to achieve precipitation, a realization scheme of using the coaming plate 1 as the drainage of the side wall of the foundation pit is provided: the water seeped from the side wall of the foundation pit enters the interior of the coaming plate 1 through the communication hole 15 , and then converge into the water tank 12 through the drainage port 13, so as to achieve the purpose of safe and convenient dewatering of the foundation pit under the condition of providing support for the side wall of the foundation pit.

At the same time, in consideration of the looseness of the sand egg stratum itself, the fluid conductivity of the drainage outlet 13 is set to be adjustable, aiming at the requirement of excavation and dewatering in the foundation pit, for example, according to the excavation needs of the foundation pit. Under the premise, the water body should be led out as little as possible through the drainage port 13, so as to reduce the influence of the foundation pit construction on the groundwater level, reduce the possibility that the foundation pit construction will cause excessively large holes around the foundation pit, and realize safe precipitation or drainage.

As a specific solution for the adjustable fluid conduction capacity of the drainage ports 13 , it is provided that the number of the drainage ports 13 is multiple, and the blocking state of some or all of the drainage ports 13 is adjustable. In this solution, a plurality of drainage ports 13 are used to form the water outlet flow adjustment of the enclosure plate 1 , and the specific adjustment method adopts the method of blocking some of the drainage ports 13 . In the specific application, if the drainage of the foundation pit does not meet the safety requirements, the state in which all the drainage ports 13 above are blocked can be adopted.

In the specific implementation of this solution, in order to realize the multi-gradient adjustable drainage flow of the enclosure 1 through the drain port 13, it is preferable to set the number of drain ports 13 as much as possible. Water capacity, avoid concentrated water diversion leading to oversized local holes in the foundation pit and expand the influence of foundation pit excavation on the bottom layer. , is set to: also include a filter screen 16 arranged in the hollow space of the enclosure 1, in the thickness direction of the enclosure 1, the filter screen 16 divides the hollow space into an outer cavity and an inner cavity, so 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;

It also includes a mud discharge port 7 connected to the bottom side of the enclosure plate 1, and the inlet end is connected with the inner cavity;

It also includes a water injection port 9 connected to the enclosure plate 1, and the outlet end is connected to the inner cavity;

Both the mud discharge port 7 and the water injection port 9 are provided with cut-off devices for controlling their respective on-off states. In this solution, the filter screen 16 is used as the filter element between the communication hole 15 and the drain port 13, so as to avoid the drain port 13 being blocked due to the introduction of sand, mud, etc. Blocking; set to include the mud discharge port 7 and the water injection port 9, aiming to achieve: periodically or when necessary, inject cleaning water through the water injection port 9 to clean the outer cavity, and then discharge from the mud discharge port 7; It is arranged to also include a cut-off device, aiming to realize the cut-off of the mud discharge port 7 under unnecessary circumstances, and the fluid is only enriched in the water tank 12 and extracted by a general pump body; the positions of the above mud discharge port 7 and water injection port 9 are limited, and the purpose is Cover the entire filter surface of the filter screen 16 with the above cleaning water as much as possible; the setting of the above cut-off device is not only intended to achieve the above purpose of limiting the flow, but also the outer cavity can be used as a temporary storage space for sand and mud entering the coaming plate 1 , for example, using the sand and mud accumulated in the outer cavity at a certain time interval to judge the influence of the precipitation flow on the formation safety at this time.

As a technical solution for solving the blockage of the communication holes 15 by introducing pressure gas into the hollow space of the enclosure plate 1 under the condition of closing the drain ports 13 and shutting off the cut-off device, it is set as follows: the drain ports 13 are matched with each other. There is a plug 14, and also includes a communication pipe 8 connected to the enclosure plate 1, and the outlet end communicates with the hollow space.

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

On the wall surface of the hollow space of the enclosure plate 1, two chutes are arranged in a facing relationship, and the filter screen 16 is clamped in the hollow space through the chutes;

The starting end of the chute is facing the surface where the bolts are connected to the enclosure plate 1 . With this solution, after the bolts connected to the enclosure plate 1 are detached, the removal or installation of the filter screen 16 can be completed by pulling and inserting operations.

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

As a technical solution to facilitate the completion of the confinement of the enclosure plate 1 on the edge of the foundation pit, it is set that: the cross bar 2 includes a threaded barrel 4 and a threaded rod 5 that are connected in series, and the threaded barrel 4 is threadedly connected to the threaded rod 5 and is the same as the threaded rod 5. The threaded barrel 4 is connected to the vertical rod 3, and a backing plate 6 is also provided between the end of the threaded rod 5 and the inner side of the enclosure plate 1;

The backing plate 6 includes: a first plate body that is a steel plate, a second plate body that is a plastic plate or a graphite plate, and a third plate body that is a steel plate. The first plate body is fixedly connected to the threaded rod 5, and the The second plate body is sandwiched between the first plate body and the third plate body, and the outer side of the bottom plate body is in contact with the inner side of the enclosure plate 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.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be considered that the specific embodiments of the present invention are limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, other embodiments obtained without departing from the technical solutions of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A mechanism for anti-damage reinforcement of geotechnical engineering, comprising a foundation pit support assembly, the foundation pit support assembly comprising two enclosure plates (1), and a support frame for supporting the enclosure plates (1), Two enclosure plates (1) are distributed on a pair of opposite sides of the support frame; The support frame includes a vertical rod (3) and a plurality of transverse rods (2) arranged along the axis direction of the vertical rod (3), and the horizontal rods (2) serve as the vertical rod (3) and the enclosure plate (1) The support between the inner sides is characterized in that it further comprises a sleeve (20) sleeved on the vertical rod (3) and capable of sliding along the axis of the vertical rod (3), and each sleeve (20) is fixed with a sleeve (20). Two cross bars (2), and the cross bars (2) on each sleeve (20) are line-symmetrical with respect to the axis of the sleeve (20); The length of the cross bar (2) is adjustable; Also includes a lifting ring (18) arranged on the top of the vertical rod (3), the downward projection of the lifting ring (18) falls on the crossbar (2), and the axis of the lifting ring (18) and the axis of the vertical rod (3) collinear; A locking device for locking the position of the sleeve (20) on the axis of the vertical rod (3) is provided between each sleeve (20) and the vertical rod (3); The lifting ring (18) is detachably connected to the vertical rod (3). 2 . The mechanism for anti-damage reinforcement of geotechnical engineering according to claim 1 , wherein the locking device comprises a set on the vertical rod ( 3 ) and is sequentially arranged along the axis of the vertical rod ( 3 ). 3 . A plurality of latch holes (19) are provided, the number of the latch holes (19) is greater than or equal to the number of the sleeves (20), and each sleeve (20) is provided with a through-hole (19) matching The locking of the position of the sleeve (20) on the axis of the vertical rod (3) is achieved by shearing the bolts inserted in the through holes and the corresponding bolt holes (19). 3. The mechanism for anti-damage reinforcement of geotechnical engineering according to claim 1, wherein the enclosure plate (1) is a hollow plate-like structure; The enclosure plate (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 communication holes (15) penetrating the inner and outer sides of the outer plate; The inner side panel is provided with a drain port (13) penetrating the inner side and the outer side of the inner side panel, and the fluid conduction capacity of the drain port (13) is adjustable; It also includes a water tank (12) fixed on the inner side plate, and the outlet end of the water outlet (13) is located in the water tank (12). 4. The mechanism for anti-damage reinforcement of geotechnical engineering according to claim 3, characterized in that the number of the drainage ports (13) is multiple, and some or all of the drainage ports (13) are in a blocked state Adjustable. 5. The mechanism for anti-damage reinforcement of geotechnical engineering according to claim 3, characterized in that, further comprising a filter screen (16) arranged in the hollow space of the enclosure plate (1), In the plate thickness direction, the filter screen (16) divides the hollow space into an outer cavity and an inner cavity, the outer cavity is a cavity between the filter screen (16) and the outer plate, and the inner cavity is The cavity is the cavity between the filter screen (16) and the inner side plate; It also includes a mud discharge port (7) connected to the bottom side of the enclosure plate (1), and the inlet end is connected with the inner cavity; It also includes a water injection port (9) connected to the enclosure plate (1), and the outlet end is connected to the inner cavity; Both the mud discharge port (7) and the water injection port (9) are provided with cut-off devices for controlling their respective on-off states. 6. The mechanism for anti-damage reinforcement of geotechnical engineering according to claim 5, characterized in that, each water outlet (13) is matched with a plug (14), and further comprises being connected to the enclosure plate (1), A communication pipe (8) whose outlet end communicates with the hollow space. 7. The mechanism for anti-damage reinforcement of geotechnical engineering according to claim 5, characterized in that, the connection between the filter screen (16) and the enclosure plate (1) is achieved by the following manner: The remaining four surfaces are respectively the upper end surface, the lower end surface, the left end surface and the right end surface, and any one of the remaining four surfaces is bolted to the enclosure plate (1); On the wall surface of the hollow space of the enclosure plate (1), two chutes are arranged in a facing relationship, and the filter screen (16) is clamped in the hollow space through the chutes; The starting end of the chute is directly opposite to the surface where the bolt is connected to the enclosure plate (1). 8. The mechanism for anti-damage reinforcement of geotechnical engineering according to claim 5, characterized in that it further comprises a support plate (17) arranged in the inner cavity, and the filter screen (16) serves as the boundary of the inner cavity The surface is supported on the support plate (17). 9. The mechanism for anti-damage reinforcement of geotechnical engineering according to claim 1, characterized in that, the transverse rod (2) comprises a threaded cylinder (4) and a threaded rod (5) connected in series, and the threaded rod (5) The barrel (4) is threaded and coaxial with the threaded rod (5), the threaded barrel (4) is connected with the vertical rod (3), and the end of the threaded rod (5) is between the inner side of the enclosure plate (1). A backing plate (6) is also provided; The backing plate (6) comprises: a first plate body that is a steel plate, a second plate body that is a plastic plate or a graphite plate, and a third plate body that is a steel plate, and the first plate body is fixed to the threaded rod (5). connection, the second plate body is clamped between the first plate body and the third plate body, and the outer side of the bottom plate body is in contact with the inner side of the enclosure plate (1). 10. A method for anti-damage reinforcement in geotechnical engineering, characterized in that the method is based on the mechanism described in any one of claims 1 to 9, and the method is realized by the following steps: S1. Complete the setting of all sleeves (20) on the vertical rod (3), and the sleeves (20) are stacked on the bottom of the vertical rod (3); Complete the installation of the enclosure plate (1) on both sides of the support frame, and make the enclosure plate (1) stick to the side of the foundation pit; Complete the installation of the lifting ring (18) on the top of the pole (3); S2. Adjust the lengths of the transverse rods (2) on both sides of the lowermost sleeve (20), so that both ends of the transverse rod (2) form a supporting relationship with the corresponding side wall (1); S3. Using the hoisting tool hung on the hoisting ring (18), lift the cross bar (2) on the upper sleeve (20) of the lowermost sleeve (20) in turn, so that the corresponding sleeve (20) follows the Move the cross bar (2) to the desired axis position of the vertical bar (3); The specific lifting is as follows: after the uppermost sleeve (20) is lifted first and the axis position is determined, the length of the cross bar (2) is adjusted to restrain the corresponding side wall (1), and then the corresponding locking device is used to complete the fixing to the corresponding side wall (1). One on the vertical rod (3), and then, in the arrangement sequence of the sleeves (20), the position adjustment of each sleeve (20) on the vertical rod (3), the adjustment of the crossbar ( 2) The length is fixed by constraining the coaming plate (1) and the position on the vertical rod (3).

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