Well chamber foundation pit supporting structure of inversely-hung well wall

Abstract

The utility model discloses a well chamber foundation pit supporting structure of an upside-down hanging well wall, which belongs to the technical field of well chamber foundation pit supporting and comprises a well pit, and a top wall protecting ring is arranged at the top of the well pit. In the utility model, when a well pit is excavated, the outer side of the top end of the well pit is supported by utilizing the top wall protecting ring, and the short split protecting wall and the long split protecting wall are sequentially placed from top to bottom to support the lower part of the top wall protecting ring; the structure that the long split protection walls and the short split protection walls are spliced into the spliced middle protection wall rings is conveniently put into a well pit for supporting, and the top protection wall ring and the spliced middle protection wall rings as well as the spliced middle protection wall rings are connected through matching of the inserting grooves and the inserting bases; the spliced middle wall protecting ring and the bottom plate are connected through cooperation of the inserting blocks and the inserting grooves, the supporting strength of the supporting structure is guaranteed, and the working quality of the well chamber foundation pit supporting structure of the inversely-hung well wall is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of well chamber foundation pit support, and more specifically, to a well chamber foundation pit support structure with an inverted well wall. Background Art

[0002] With the continuous development and improvement of urban construction, the conditions for foundation pit construction in the city center are becoming more and more complicated. Various existing municipal pipelines are densely packed, the construction space is becoming increasingly narrow, and the requirements for the construction environment are becoming increasingly high. This puts higher demands on the excavation and support of the foundation pit. The open trench can be constructed using the inverted well wall method, which is suitable for trench support construction in areas with narrow sites and many pipelines, and a trench depth of 3 to 5 meters.

[0003] After searching, the utility model patent with announcement number CN217651808U discloses a foundation pit retaining structure with an inverted well wall, which can effectively reduce the impact on traffic and the environment during construction, effectively protect underground pipelines, and is convenient to construct and has high construction efficiency. It includes a top retaining wall segment, a middle retaining wall segment, a bottom retaining wall segment and a bottom plate of a cast-in-place reinforced concrete structure. The top retaining wall segment and the adjacent middle retaining wall segment, the adjacent middle retaining wall segments, and the middle retaining wall segment and the bottom retaining wall segment are connected as a whole through reserved vertical dowel bars, and the bottom plate is connected as a whole with the bottom retaining wall segment through reserved horizontal dowel bars to form a complete retaining structure. The cross-section of the top retaining wall segment is an inverted L-shaped, with horizontal ribs hanging on the ground and a vertical segment extending downward. However, the above patent still has the following shortcomings: a top retaining wall segment is arranged above the well pit, the middle retaining wall segment and the bottom retaining wall segment are not convenient to be placed in the well pit, and it is not convenient to make a stable connection between the supported retaining walls. For this reason, we propose a well chamber foundation pit support structure with an inverted well wall. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model aims to provide a well chamber foundation pit support structure with an inverted well wall.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A well chamber foundation pit support structure with an inverted well wall comprises a well pit, a top wall retaining ring is arranged on the top of the well pit, a plurality of spliced ​​middle wall retaining rings are arranged in the inner cavity of the well pit and below the top wall retaining ring, a bottom plate is arranged at the bottom of the well pit, the spliced ​​middle wall retaining ring comprises two long split wall retainings and two short split wall retainings, the ends of the two long split wall retainings are respectively fitted with the inner side surfaces of the two short split wall retainings, the bottoms of the long split wall retainings, the short split wall retainings and the top wall retaining ring are all provided with slots, the top surfaces of the long split wall retainings and the short split wall retainings are both provided with sockets, the outer sides of the long split wall retainings and the short split wall retainings are both provided with casting troughs, the top of the top wall retaining ring is provided with casting holes, and the positions of the casting holes and the casting troughs are adapted to each other.

[0007] As a preferred solution of the utility model, contraction grooves are respectively provided at the bottoms of both ends of the bottom plate, the inner walls of the two contraction grooves are fixedly connected with springs, the ends of the two springs are fixedly connected with plug blocks, the plug blocks are slidably connected to the inner cavity of the contraction grooves, and the shape of one end of the plug block is adapted to the shape of the inner cavity of the slot.

[0008] As a preferred solution of the utility model, the inner cavity of the casting trough is provided with reinforcing ribs.

[0009] As a preferred solution of the utility model, the outer side surfaces of the long split protective wall and the short split protective wall are fixedly connected with pins.

[0010] As a preferred solution of the utility model, the size of the socket shape is matched with the size of the inner cavity of the slot.

[0011] As a preferred solution of the utility model, the inner side surfaces of the long split protective wall and the short split protective wall are respectively flush with the inner wall of the top protective wall ring, and the side surfaces of the bottom plate are respectively in contact with the inner side surfaces of the long split protective wall and the short split protective wall.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] (1) In the utility model, when a well pit is excavated, the top retaining wall ring is used to support the outer side of the top of the well pit, and the short split retaining wall and the long split retaining wall are sequentially placed from top to bottom to support the bottom of the top retaining wall ring. The structure of the spliced ​​middle retaining wall ring assembled by the long split retaining wall and the short split retaining wall is convenient for being placed in the well pit for support. In addition, the top retaining wall ring and the spliced ​​middle retaining wall ring, the spliced ​​middle retaining wall ring and the spliced ​​middle retaining wall ring are connected by the cooperation between the slot and the socket, and the spliced ​​middle retaining wall ring and the bottom plate are connected by the cooperation between the plug block and the slot, so as to ensure the support strength of the support structure.

[0014] (2) In the utility model, when the long split retaining wall and the short split retaining wall are installed, the pins are inserted into the inner wall of the well pit, thereby increasing the connection strength between the long split retaining wall, the short split retaining wall and the well pit. In addition, through the coordinated use of casting holes, casting grooves and reinforcing ribs, after the support structure is assembled, concrete is poured in the casting holes and casting grooves, and the top retaining wall ring, the long split retaining wall, the short split retaining wall and the well pit are connected by concrete, thereby ensuring the support strength of the support structure and improving the working quality of the well chamber foundation pit support structure of the inverted well wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a disassembled exploded view of the spliced ​​middle wall protection ring of the utility model;

[0017] Figure 3 It is an exploded view of the overall structure of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the bottom plate of the utility model.

[0019] Description of the numbers in the figure:

[0020] 1. Well pit; 2. Top wall guard ring; 3. Spliced ​​middle wall guard ring; 4. Bottom plate; 5. Long split wall guard; 6. Short split wall guard; 7. Slot; 8. Socket; 9. Casting trough; 10. Casting hole; 11. Reinforcement rib; 12. Pin; 13. Shrinkage groove; 14. Spring; 15. Block. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Example:

[0025] See also Figure 1-4 A well chamber foundation pit support structure with an inverted well wall comprises a well pit 1, a top wall protection ring 2 is arranged on the top of the well pit 1, a plurality of spliced ​​middle wall protection rings 3 are arranged in the inner cavity of the well pit 1 and below the top wall protection ring 2, a bottom plate 4 is arranged at the bottom of the well pit 1, the spliced ​​middle wall protection ring 3 comprises two long split wall protections 5 and two short split wall protections 6, the ends of the two long split wall protections 5 are respectively fitted with the inner sides of the two short split wall protections 6, slots 7 are provided at the bottoms of the long split wall protections 5, the short split wall protections 6 and the top wall protection ring 2, sockets 8 are provided on the top surfaces of the long split wall protections 5 and the short split wall protections 6, casting grooves 9 are provided on the outer sides of the long split wall protections 5 and the short split wall protections 6, a casting hole 10 is provided on the top of the top wall protection ring 2, and the positions of the casting hole 10 and the casting groove 9 are adapted to each other.

[0026] In this embodiment, concrete is poured through the casting hole 10 and allowed to fall into the casting groove 9 on the side of the long split guard wall 5 and the short split guard wall 6. The concrete increases the connection strength between the top guard wall ring 2, the long split guard wall 5, the short split guard wall 6 and the pit 1. In addition, the top guard wall ring 2, the long split guard wall 5, the short split guard wall 6 and the bottom plate 4 are all prefabricated concrete parts, and steel bars are arranged inside them.

[0027] For details, please refer to Figure 4 The bottoms of both ends of the bottom plate 4 are respectively provided with contraction grooves 13, the inner walls of the two contraction grooves 13 are fixedly connected with springs 14, the ends of the two springs 14 are fixedly connected with plug blocks 15, the plug blocks 15 are slidably connected to the inner cavity of the contraction grooves 13, and the shape of one end of the plug block 15 is adapted to the shape of the inner cavity of the slot 7.

[0028] In this embodiment, the elastic force of the spring 14 drives the end of the plug 15 to be inserted into the slot 7 at the bottom of the lowest long split protective wall 5 and the short split protective wall 6, so that the bottom plate 4 is stably installed at the bottom of the pit 1.

[0029] For details, please refer to Figure 2 The inner cavity of the casting trough 9 is provided with reinforcing ribs 11.

[0030] In this embodiment, the connection strength between the concrete and the long split retaining wall 5 and the short split retaining wall 6 is increased by the reinforcing ribs 11 .

[0031] For details, please refer to Figure 2 The outer sides of the long split protective wall 5 and the short split protective wall 6 are fixedly connected with pins 12.

[0032] In this embodiment, when installing the long split protective wall 5 and the short split protective wall 6, the nails 12 are inserted into the inner wall of the pit 1 to increase the connection strength between the long split protective wall 5, the short split protective wall 6 and the pit 1.

[0033] For details, please refer to Figure 2 The size of the socket 8 is matched with the size of the inner cavity of the slot 7.

[0034] In this embodiment, the stability of the socket 8 being inserted into the slot 7 is ensured, thereby ensuring the connection stability between the top wall protection ring 2 and the spliced ​​middle wall protection ring 3, and between the spliced ​​middle wall protection ring 3 and the spliced ​​middle wall protection ring 3.

[0035] For details, please refer to Figures 1 to 3 The inner side surfaces of the long split protective wall 5 and the short split protective wall 6 are respectively flush with the inner wall of the top protective wall ring 2, and the side surfaces of the bottom plate 4 are respectively fitted with the inner side surfaces of the long split protective wall 5 and the short split protective wall 6.

[0036] In this embodiment, the smoothness of the inner wall of the well pit 1 is ensured after support. In addition, the sealing between the bottom plate 4 and the spliced ​​middle protective wall ring 3 is ensured by the fit between the bottom plate 4 and the long split protective wall 5 and the short split protective wall 6.

[0037] Working principle: When in use, first dig on the surface of the foundation pit. When the pit 1 is dug to a certain depth, place the top retaining wall ring 2 in the pit 1 at this time, and then continue to dig at the bottom of the pit 1 at this time. When the excavation depth and the height of the long split retaining wall 5 and the short split retaining wall 6 are matched, first put the two short split retaining walls 6 into the pit 1, and push the two short split retaining walls 6 to the two ends of the bottom of the top retaining wall ring 2. At the same time, the sockets 8 on the top of the two short split retaining walls 6 are inserted into the top retaining wall ring 2. The two long split protective walls 5 are inserted into the slot 7 at the bottom of the lower protective wall ring 2, and then the two long split protective walls 5 are placed in the pit 1, and the two long split protective walls 5 are pushed to the two sides of the bottom of the top protective wall ring 2, so that the sockets 8 on the top of the two long split protective walls 5 are inserted into the slot 7 at the bottom of the top protective wall ring 2. At this time, the pins 12 on the outside of the long split protective walls 5 and the short split protective walls 6 are inserted into the inner wall of the pit 1. In addition, the inner side surfaces of the long split protective walls 5 and the short split protective walls 6 are flush with the inner wall of the top protective wall ring 2, and then continue At this time, the bottom of the pit 1 is excavated, and the spliced ​​middle wall protection ring 3 composed of the long split wall protection 5 and the short split wall protection 6 is installed at the bottom of the excavated pit 1. In this way, multiple spliced ​​middle wall protection rings 3 are installed in the pit 1 to support the pit 1. When the pit 1 is excavated to a predetermined depth, the plug block 15 on the side of the bottom plate 4 is pressed to retract into the inner cavity of the contraction groove 13, and the bottom plate 4 is placed into the inner side of the top wall protection ring 2 and the spliced ​​middle wall protection ring 3, so that the bottom plate 4 moves down to the pit 1 At the bottom, the elastic force of the spring 14 drives the plug 15 to be inserted into the slot 7 on the bottom surface of the lowest long split protective wall 5 and the short split protective wall 6, so that the bottom plate 4 is stably installed in the pit 1, and finally concrete is poured from the pouring hole 10 above the top protective wall ring 2, and the concrete is allowed to fall from the pouring groove 9 on the side of the long split protective wall 5 and the short split protective wall 6, and the long split protective wall 5, the short split protective wall 6, the top protective wall ring 2 and the inner wall of the pit 1 are connected by concrete.

[0038] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. A well chamber foundation pit support structure with an inverted well wall, comprising a well pit (1), characterized in that: A top wall protection ring (2) is arranged at the top of the well pit (1), a plurality of spliced ​​middle wall protection rings (3) are arranged in the inner cavity of the well pit (1) and below the top wall protection ring (2), a bottom plate (4) is arranged at the bottom of the well pit (1), the spliced ​​middle wall protection ring (3) comprises two long split wall protections (5) and two short split wall protections (6), the ends of the two long split wall protections (5) are respectively fitted with the inner side surfaces of the two short split wall protections (6), The bottoms of the long split protective wall (5), the short split protective wall (6) and the top protective wall ring (2) are all provided with slots (7); the top surfaces of the long split protective wall (5) and the short split protective wall (6) are both provided with sockets (8); the outer sides of the long split protective wall (5) and the short split protective wall (6) are both provided with casting grooves (9); the top of the top protective wall ring (2) is provided with casting holes (10); the positions of the casting holes (10) and the casting grooves (9) are matched.

2. The well chamber foundation pit support structure with an inverted well wall according to claim 1 is characterized in that: The bottoms of both ends of the bottom plate (4) are respectively provided with contraction grooves (13); the inner walls of the two contraction grooves (13) are fixedly connected with springs (14); the ends of the two springs (14) are fixedly connected with plug blocks (15); the plug blocks (15) are slidably connected to the inner cavities of the contraction grooves (13); the outer shape of one end of the plug block (15) is adapted to the shape of the inner cavity of the slot (7).

3. The well chamber foundation pit support structure with an inverted well wall according to claim 1 is characterized in that: The inner cavity of the casting trough (9) is provided with reinforcing ribs (11).

4. The well chamber foundation pit support structure with an inverted well wall according to claim 1 is characterized in that: The outer sides of the long split protective wall (5) and the short split protective wall (6) are both fixedly connected with inserting pins (12).

5. The well chamber foundation pit support structure with an inverted well wall according to claim 1 is characterized in that: The size of the socket (8) is adapted to the size of the inner cavity of the slot (7).

6. The well chamber foundation pit support structure with an inverted well wall according to claim 1 is characterized in that: The inner side surfaces of the long split protective wall (5) and the short split protective wall (6) are respectively flush with the inner wall of the top protective wall ring (2), and the side surfaces of the bottom plate (4) are respectively in contact with the inner side surfaces of the long split protective wall (5) and the short split protective wall (6).

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