Subway deep foundation pit excavating and feeding device

Abstract

The utility model belongs to the field of foundation pit excavation civil construction technology, and disclose a subway deep foundation pit excavation feeding device, including foundation pit, crossbeam, steel support and chain plate conveyer, crossbeam and steel support are located in the inner chamber of foundation pit, chain plate conveyer feed end and discharge end are located at the bottom end of foundation pit and the top end of foundation pit respectively, the top end of steel support and side surface are fixedly connected with slide rail one and slide rail two respectively, the top end of slide rail one and the inside of slide rail two are slidably connected with sliding block and limiting frame respectively, through above -mentioned scheme, solved the process of foundation pit excavation, need in the installation foundation pit support in the inner wall of foundation pit multiple foundation pit support in the foundation pit inside cross, lead to the operation space is limited, and large -scale excavation in the foundation pit support inside cannot stretch, will lead to the slag earth to be unable to timely external transport, the foundation pit excavation progress stagnate, can cause slag earth to fall, slag earth accumulation leads to foundation pit side pressure increase material to overturn and so on safety accident.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit excavation and civil construction technology, specifically a material feeding device for deep foundation pit excavation in subways. Background Technology

[0002] Deep foundation pit excavation and material loading for subway projects is a core part of subway construction. Essentially, it involves first excavating the deep foundation pit using specialized equipment, and then efficiently transporting the excavated soil or construction materials out of or into the pit. It is a prerequisite and key step in the construction of underground structures such as subway stations and tunnels.

[0003] Excavation and material loading in existing foundation pits are usually carried out using gantry cranes or grab bucket cranes to excavate by grabbing the drill. However, during the excavation process, it is often necessary to install foundation pit supports on the inner wall of the foundation pit. Multiple sets of foundation pit supports intersect inside the foundation pit, which restricts the operating space. Large excavators cannot extend inside the foundation pit supports, which can lead to the inability to transport excavated soil in a timely manner, and the excavation progress may be halted. This may also cause safety accidents such as soil falling, soil accumulation leading to increased lateral pressure in the foundation pit and material overturning. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a deep foundation pit excavation and loading device for subways, which has the advantage of combining support components with load-bearing and conveying equipment, thus saving independent floor space.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a deep foundation pit excavation and feeding device for subways, comprising a foundation pit, a crossbeam, steel supports and a chain conveyor, wherein the crossbeam and steel supports are located in the inner cavity of the foundation pit, the feeding end and the discharging end of the chain conveyor are located at the bottom end and the top end of the foundation pit respectively, and the steel supports are provided in four sets and are evenly distributed inside the foundation pit. The top and side of the steel support are respectively fixedly connected to slide rail one and slide rail two. The top of slide rail one and the inside of slide rail two are respectively slidably connected to slider and limit frame. The top of the slider is fixedly connected to the bottom of the chain conveyor, and the limit frame is fixedly connected to the side of the chain conveyor. The chain conveyor slides inside slide rail one and slide rail two.

[0006] Preferably, the surface of the slide rail two is provided with a slide groove, the limiting frame is disposed inside the slide groove and slides, and locking pins are threadedly connected to both sides of the limiting frame.

[0007] Preferably, the locking pin is threadedly connected to the inside of the limiting frame and passes through the slide groove, and the other end of the locking pin is threadedly connected to a locking cap, with the top of the locking cap at the bottom of the slide rail two.

[0008] Preferably, the two sides of the steel support are fixedly connected to the surface of the crossbeam by bolts, the end of the steel support is set in an open shape, the front end of the crossbeam is set in a protrusion, and the open shape of the steel support slides at the protrusion position of the crossbeam.

[0009] Preferably, the steel support is composed of multiple sets of steel structures connected by bolts. Notches are provided on the surfaces of slide rail one and slide rail two near the steel support, and the notches cover the connection points of the steel structure surfaces.

[0010] Preferably, the surfaces of slide rail one, slide rail two, and the steel support are all provided with positioning grooves, and positioning pins are threaded inside the positioning grooves of slide rail one and slide rail two. The positioning pins are used to fix slide rail one and slide rail two to the surface of the steel support.

[0011] Preferably, the chain conveyor is configured in an L-shape and its surface is made of a wear-resistant material.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model adopts a new structural form, welding detachable guide rails on the steel supports and horizontal supports on both sides of the foundation pit, and designs the chain plate conveyor as a suspended type, which moves along the guide rails under the steel supports, without the need to set up a separate conveyor support and without occupying the ground space at the bottom of the pit. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the crossbeam structure of this utility model; Figure 3 This is a schematic diagram of the steel support structure of this utility model; Figure 4 This is a schematic diagram of the chain conveyor of this utility model located in the foundation pit; Figure 5 This is a schematic diagram of the locking pin and locking cap of this utility model.

[0014] In the diagram: 1. Excavation pit; 2. Crossbeam; 3. Steel support; 31. Slide rail one; 32. Positioning pin; 33. Slider; 34. Slide rail two; 35. Limiting bracket; 36. Horizontal groove; 37. Locking pin; 38. Locking cap; 4. Chain conveyor. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1 to 5 As shown, this utility model provides a deep foundation pit excavation and feeding device for subways, including a foundation pit 1, a crossbeam 2, a steel support 3 and a chain conveyor 4. The crossbeam 2 and the steel support 3 are located in the inner cavity of the foundation pit 1. The feeding end and the discharging end of the chain conveyor 4 are located at the bottom end and the top end of the foundation pit 1, respectively. There are four sets of steel supports 3, which are evenly distributed inside the foundation pit 1. The top and side of the steel support 3 are respectively fixedly connected to slide rail 1 31 and slide rail 2 34. The top of slide rail 1 31 and the inside of slide rail 2 34 are respectively slidably connected to slider 33 and limit frame 35. The top of slider 33 is fixedly connected to the bottom of chain conveyor 4, and limit frame 35 is fixedly connected to the side of chain conveyor 4. Chain conveyor 4 slides inside slide rail 1 31 and slide rail 2 34.

[0017] In this embodiment, the chain conveyor 4 slides on the surfaces of slide rail 1 31 and slide rail 2 34 to adjust the position of the chain conveyor 4 in the pit 1, so as to facilitate the chain conveyor 4 to excavate and load materials inside the pit 1.

[0018] Specifically, the surface of the slide rail 34 is provided with a transverse groove 36, and the two sides of the limit frame 35 are arranged to slide inside the transverse groove 36. The two sides of the limit frame 35 are respectively threaded with locking pins 37.

[0019] Furthermore, the locking pin 37 is internally threaded to the limiting frame 35 and passes through the transverse groove 36. The other end of the locking pin 37 is threaded to a locking cap 38, and the top of the locking cap 38 slides at the bottom of the slide rail 2 34. The locking pin 37 is inserted into the interior of the limiting frame 35 and slides in the transverse groove 36 on the surface of the slide rail 2 34. During the sliding process, it is necessary to release the locking cap 38 from locking the locking pin 37. When it is necessary to fix it, the locking cap 38 rotates on the surface of the locking pin 37 and presses against the surface of the slide rail 2 34 to press against the limiting frame 35 and prevent the chain conveyor 4 from shifting inside the slide rail 2 34.

[0020] Furthermore, the two sides of the steel support 3 are fixedly connected to the surface of the crossbeam 2 by bolts. The end of the steel support 3 is set as an opening, and the front end of the crossbeam 2 is set as a protrusion. The opening of the steel support 3 slides at the protrusion of the crossbeam 2, which can reasonably adjust the position of the steel support 3 on the crossbeam 2 and achieve force balance. The steel support 3 is composed of multiple groups of steel structures, which are connected by bolts. Notches are opened on the surface of the slide rail 1 31 and slide rail 2 34 near the steel support 3, and the notches cover the connection of the steel structure surface. Positioning grooves are opened on the surface of the slide rail 1 31, slide rail 2 34 and the steel support 3. Positioning pins 32 are threaded inside the positioning grooves of the slide rail 1 31 and slide rail 2 34. The positioning pins 32 are used to fix the slide rail 1 31 and slide rail 2 34 to the surface of the steel support 3. In this embodiment, various steel structures are placed inside the foundation pit 1 to support the inner wall of the foundation pit 1. When assembling slide rail 1 31 and slide rail 2 34, slide rail 1 31 and slide rail 2 34 are hoisted onto the surface of the steel support 3. After the positioning grooves on the surface of slide rail 1 31 and slide rail 2 34 coincide with the positioning grooves on the surface of the steel support 3, they are fixed by threaded connection using positioning pins 32. This method is convenient for disassembly and assembly and can be used on the surface of the steel support 3 in other positions.

[0021] It is worth mentioning that the chain conveyor 4 is designed in an L-shape and its surface is made of wear-resistant material, which enables near-vertical feeding, reduces the space occupied, and the bottom of the chain conveyor 4 does not need to be supported and does not contact the inside of the pit 1, increasing the construction area of ​​the pit 1. The wear-resistant material can extend the service life of the chain conveyor 4 and avoid the need for frequent replacement of the chain conveyor 4 and repeated hoisting of the chain conveyor 4.

[0022] The foundation pit 1, crossbeam 2, steel support 3, and chain conveyor 4 are existing technologies and will not be described in detail. Additionally, this utility model also includes a power supply, controller, and switches, which are not the main technical points of this patent and will not be described in detail. The "front, rear, left, and right" perspectives of this device are... Figure 1 The direction shown in the diagram is the reference.

[0023] Working principle: Step 1: Dig a pit and install crossbeams 2 on both sides of the inner wall of the pit 1 during the digging process. Steel supports 3 are then fitted onto the surface of the crossbeams 2. The ends of the steel supports 3 are inserted into the protruding positions on the surface of the crossbeams 2 and fixed to one side of the crossbeams 2 with bolts. Then, the other set of steel supports 3 is fixed to the opposite crossbeams 2 in the same way. Finally, the two sets of steel supports 3 are fixed with bolts and merged into one set of steel supports 3. Then, the remaining steel supports 3 are assembled onto the surface of the crossbeams 2 in the same way. Slide rail 1 31 and slide rail 2 34 are respectively installed on the surface of steel support 3. During installation, the positioning holes on both sides of slide rail 1 31 and slide rail 2 34 need to be aligned with the positioning holes on the surface of steel support 3, and fixed to steel support 3 by positioning pin 32 to complete the assembly of slide rail 1 31 and slide rail 2 34. Then, the chain conveyor 4 is hoisted into the limit frame 35 located in the slide groove of slide rail 2 34. The bottom end of the chain conveyor 4 is located in the slider 33 in the slide groove of slide rail 1 31. After aligning the positions, the slider 33 and the chain conveyor are connected. The bottom end of the conveyor 4 is fixed, and the thread on the surface of the limit frame 35 is inserted into the limit frame 35 and locked and fixed to the side of the chain conveyor 4. Then, when it is necessary to fix the position of the chain conveyor 4, the locking pins 37 are slid toward the side of the limit frame 35 and pressed against it. The locking caps 38 are rotated on the surface of the locking pins 37 and pressed against the bottom end of the slide rail 34 to complete the limiting of the locking pins 37 to the limit frame 35, so as to prevent the chain conveyor 4 from deviating when conveying materials. When it is necessary to move the position of the chain conveyor 4, release the limit frame 35 and control the limit frame 35 to slide inside the slide rail 2 34. During the sliding process, the locking pin 37 slides in the transverse groove 36 on the surface of the slide rail 2 34, controlling the chain conveyor 4 to move on the surface of the steel support 3, and then move to the designated position. The same means are used to lock the limit frame 35, so as to realize the feeding of materials to other areas inside the pit 1.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A material feeding device for deep foundation pit excavation in subway construction, comprising a foundation pit (1), a crossbeam (2), a steel support (3), and a chain conveyor (4), wherein the crossbeam (2) and the steel support (3) are located within the cavity of the foundation pit (1), and the inlet and outlet ends of the chain conveyor (4) are located at the bottom and top of the foundation pit (1), respectively, characterized in that: The steel supports (3) are provided in four sets and are evenly distributed inside the foundation pit (1); The top and side of the steel support (3) are respectively fixedly connected to slide rail one (31) and slide rail two (34). The top of slide rail one (31) and the inside of slide rail two (34) are respectively slidably connected to slider (33) and limit frame (35). The top of slider (33) is fixedly connected to the bottom of chain conveyor (4), and the limit frame (35) is fixedly connected to the side of chain conveyor (4). The chain conveyor (4) slides inside slide rail one (31) and slide rail two (34).

2. The deep foundation pit excavation and feeding device for subways according to claim 1, characterized in that: The surface of the slide rail (34) is provided with a transverse groove (36), and the two sides of the limiting frame (35) are arranged to slide inside the transverse groove (36). The two sides of the limiting frame (35) are respectively threaded with locking pins (37).

3. The deep foundation pit excavation and feeding device for subways according to claim 2, characterized in that: The locking pin (37) is internally threaded to the limiting frame (35) and passes through the transverse groove (36). The other end of the locking pin (37) is threaded to a locking cap (38), and the top of the locking cap (38) slides at the bottom of the slide rail (34).

4. The deep foundation pit excavation and feeding device for subways according to claim 1, characterized in that: The two sides of the steel support (3) are fixedly connected to the surface of the crossbeam (2) by bolts. The end of the steel support (3) is set to be open, and the front end of the crossbeam (2) is set to be protruding. The open part of the steel support (3) slides at the protruding part of the crossbeam (2).

5. The deep foundation pit excavation and feeding device for subways according to claim 4, characterized in that: The steel support (3) is composed of multiple steel structures connected by bolts. Notches are provided on the surfaces of slide rail one (31) and slide rail two (34) near the steel support (3), and the notches cover the connection points of the steel structures.

6. The deep foundation pit excavation and feeding device for subways according to claim 5, characterized in that: The surfaces of the slide rail one (31) and slide rail two (34) and the steel support (3) are all provided with positioning grooves. The positioning grooves of the slide rail one (31) and slide rail two (34) are threaded with positioning pins (32). The positioning pins (32) are used to fix the slide rail one (31) and slide rail two (34) to the surface of the steel support (3).

7. The deep foundation pit excavation and material feeding device for subways according to claim 1, characterized in that: The chain conveyor (4) is configured in an L-shape and its surface is made of wear-resistant material.

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