Drainage structure and foundation pit supporting device

Abstract

The utility model provides a drainage structure and a foundation pit supporting device, the drainage structure comprises the foundation pit supporting device and a first liquid pumping pipe, the foundation pit supporting device comprises a cross supporting mechanism, a first steel sheet pile and a second steel sheet pile, and the first steel sheet pile and the second steel sheet pile are both used for covering the periphery of a foundation pit; the first steel sheet pile and the second steel sheet pile are U-shaped, bending parts are arranged at the left and right ends of the first steel sheet pile and the second steel sheet pile, and the first steel sheet pile and the second steel sheet pile are detachably connected through the bending parts; the closed end of the first steel sheet pile is used for abutting against the inner wall of the foundation pit. The first liquid pumping pipe is mounted at the closed end of the first steel sheet pile; the foundation pit supporting structure can solve the problems that in the prior art, when rainwater outside a foundation pit flows into the foundation pit in rainy weather, an engineering main body structure, a foundation or a foundation pit supporting structure is damaged, and large safety and economic risks exist.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit drainage technology, specifically to a drainage structure and foundation pit support device. Background Technology

[0002] When constructing underground structures such as pipelines, basements, and subway stations, it is necessary to excavate the ground surface to form a foundation pit. Because foundation pit excavation disrupts the original soil equilibrium, the soil may collapse due to its own weight or external loads if it is not supported in time.

[0003] The support structure can withstand the lateral pressure of the soil and prevent the soil from moving into the foundation pit, thereby ensuring the stability of the foundation pit. For example, the utility model with announcement number CN213709563U discloses a foundation pit support structure (hereinafter referred to as prior art 1), which includes a foundation pit body. The four side walls of the foundation pit body are the first foundation pit side wall on the north side, the second foundation pit side wall on the east side, the third foundation pit side wall on the south side, and the fourth foundation pit side wall on the west side. The first foundation pit side wall is provided with a first support structure of pile type, the second foundation pit side wall is provided with a second support structure of pile type, and the third and fourth foundation pit side walls are both set as slope sides. The slope sides are provided with a third support structure, which is a steel mesh laid on the slope side.

[0004] Existing technology 1 uses different support structures to support the sidewalls of the corresponding foundation pit body, thereby achieving a good support effect on the sidewalls of the foundation pit; however, since the foundation construction process often involves foundation pit construction with large area, deep depth and long cycle, it is inevitable to encounter rainy weather, which will cause rainwater outside the foundation pit to flow into the foundation pit. When the rainfall is large, it may cause damage to the main structure of the project, the foundation or the foundation pit support structure, which poses a great safety and economic risk. Utility Model Content

[0005] The purpose of this utility model is to provide a drainage structure and foundation pit support device, which can solve the problem in the prior art that when rainwater from outside the foundation pit flows into the foundation pit due to rainfall, it will cause damage to the main structure, foundation or foundation pit support structure of the project, resulting in significant safety and economic risks.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A foundation pit support device includes a cross bracing mechanism, a first sheet pile and a second sheet pile, both of which are used to cover the perimeter of the foundation pit.

[0008] The first sheet pile and the second sheet pile are U-shaped, and both the first sheet pile and the second sheet pile are provided with bent portions at their left and right ends. The first sheet pile and the second sheet pile are detachably connected through the bent portions. The closed end of the first sheet pile is used to abut against the inner wall of the foundation pit, and both the upper and lower ends of the cross bracing mechanism are used to connect to the closed end of the second sheet pile.

[0009] The cross bracing mechanism is used in conjunction with the second sheet pile to support the inner wall of the foundation pit.

[0010] Preferably, the cross bracing mechanism includes a cross brace and a connecting rod, the connecting rod being fixedly connected to the upper and lower ends of the cross brace and used to connect with the second sheet pile.

[0011] Preferably, the top ends of the first and second sheet piles extend upwards to above the top of the foundation pit.

[0012] A drainage structure includes a first pumping pipe and a foundation pit support device, wherein the first pumping pipe is installed at the closed end of the first sheet pile.

[0013] Preferably, a second liquid extraction pipe is installed at the closed end of the second sheet pile.

[0014] Preferably, a water-blocking assembly is installed on the closed end of the first sheet pile. The water-blocking assembly includes a sliding part and a baffle. The sliding part is slidably installed on the closed end of the first sheet pile, and the baffle is hinged to the sliding part.

[0015] Preferably, the closed end of the first sheet pile is provided with a limiting groove, and the sliding part is provided with a limiting protrusion for cooperating with the limiting groove. The sliding part is slidably installed in the limiting groove through the limiting protrusion.

[0016] Preferably, a fixing plate is hinged to the end of the baffle away from the sliding part.

[0017] Preferably, a fixing rod is detachably mounted on the fixing plate.

[0018] Preferably, a water-guiding slope is provided at the bottom of the foundation pit.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In this utility model, there are several first steel sheet piles and second steel sheet piles. The first steel sheet piles and second steel sheet piles are driven into the foundation pit alternately according to the size of the foundation pit in actual use. The adjacent first steel sheet piles and second steel sheet piles are connected by the bending part to cover and initially support the inner wall of the foundation pit.

[0021] The cross bracing mechanism can support the first sheet pile and the second sheet pile, significantly enhancing the bending resistance of the first sheet pile and the second sheet pile, and resisting the lateral pressure generated by the soil inside the foundation pit, preventing deformation and damage to the soil inside the foundation pit.

[0022] By setting up the first suction pipe, the liquid accumulated at the bottom of the foundation pit can be pumped out, preventing rainwater from flowing into the foundation pit during rainy weather and accumulating there, which could damage the foundation structure. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a diagram showing the usage state of this utility model.

[0025] Figure 2 This is a schematic diagram of the structure of this utility model.

[0026] Figure 3 This is a schematic diagram showing the connection relationship between the first steel plate column and the second steel plate column in this utility model.

[0027] Figure 4 This utility model Figure 3 A magnified view of a portion of point A in the middle.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 101-Horizontal bracing mechanism, 102-First sheet pile, 103-Second sheet pile, 104-Bending part, 105-Horizontal bracing rod, 106-Connecting rod, 107-First suction pipe, 108-Second suction pipe, 109-Water-blocking assembly, 110-Sliding part, 111-Baffle, 112-Limiting groove, 113-Fixing plate, 114-Fixing rod, 115-Water guiding slope, Pit-116, Limiting protrusion-117. Detailed Implementation

[0030] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0031] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0034] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0036] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0037] Example 1

[0038] See Figures 1-4 This embodiment discloses a foundation pit support device, including a cross bracing mechanism 101, a first sheet pile 102 and a second sheet pile 103, both of which are used to cover the perimeter of the foundation pit 116.

[0039] The first sheet pile 102 and the second sheet pile 103 are U-shaped. Both the left and right ends of the first sheet pile 102 are provided with bending portions 104. The first sheet pile 102 and the second sheet pile 103 are detachably connected through the bending portions 104. The closed end of the first sheet pile 102 is used to abut against the inner wall of the foundation pit 116. Both the upper and lower ends of the cross bracing mechanism 101 are used to connect to the closed end of the second sheet pile 103.

[0040] The cross bracing mechanism 101 is used to cooperate with the second sheet pile 103 to support the inner wall of the foundation pit 116.

[0041] In this embodiment, when the foundation pit 116 needs to be supported by the first sheet pile 102 and the second sheet pile 103, a crane is first used to lift the sheet piles to the designated position, and then a vibratory hammer is used to drive the first sheet pile 102 and the second sheet pile 103 into the soil. During the process of driving the first sheet pile 102 and the second sheet pile 103 into the foundation pit 116, care should be taken to ensure that the pile bodies of the first sheet pile 102 and the second sheet pile 103 are vertical. There are several first sheet piles 102 and second sheet piles 103. According to the size of the foundation pit 116 in actual use, the first sheet piles 102 and the second sheet piles 103 are driven into the foundation pit 116 alternately. The adjacent first sheet piles 102 and second sheet piles 103 are connected by the bending part 104, which can cover and initially support the inner wall of the foundation pit 116. After connecting the upper and lower ends of the cross bracing mechanism 101 to the second sheet piles 103, the cross bracing mechanism 101 can support the first sheet piles 102 and the second sheet piles 103, significantly enhancing the bending resistance of the first sheet piles 102 and the second sheet piles 103, and resisting the lateral pressure generated by the soil of the inner wall of the foundation pit 116, preventing the soil of the inner wall of the foundation pit 116 from deforming and being damaged.

[0042] In some embodiments, the cross bracing mechanism 101 includes a cross brace 105 and a connecting rod 106. The connecting rod 106 is fixedly connected to the upper and lower ends of the cross brace 105 and is used to connect to the second sheet pile 103. Depending on actual needs, the connecting rod 106 can be detachably connected to the closed end of the second sheet pile 103 using bolts or other connecting components. Alternatively, the connecting rod 106 can be fixedly connected to the closed end of the second sheet pile 103 by welding or other methods. In this embodiment, the connecting rod 106 is fixedly connected to the closed end of the second sheet pile 103.

[0043] In some embodiments, the top ends of the first sheet pile 102 and the second sheet pile 103 extend upwards above the top of the foundation pit 116. During the driving of the first sheet pile 102 and the second sheet pile 103 into the ground, the top ends of the first sheet pile 102 and the second sheet pile 103 are positioned above the top of the foundation pit 116. The portion of the pile extending above the foundation pit 116 can provide some support, enhancing the overall stability of the support structure formed after the first sheet pile 102 and the second sheet pile 103 are connected. This helps prevent excessive pressure from soil or water on the support structure during construction, thereby ensuring construction safety.

[0044] Example 2

[0045] See Figures 1-4 This embodiment discloses the foundation pit support device and a drainage structure described in Embodiment 1, including a first pumping pipe 107 and a foundation pit support device, wherein the first pumping pipe 107 is installed at the closed end of the first sheet pile 102.

[0046] In this embodiment, the open end of the first sheet pile 102 is positioned away from the inner wall of the foundation pit 116. The first suction pipe 107 is connected to the closed end of the first sheet pile 102. The inlet end of the first suction pipe 107 extends downward to the bottom of the foundation pit 116, and the outlet end of the first suction pipe 107 is used to connect to the first water pump. After the first water pump is started, the liquid accumulated at the bottom of the foundation pit 116 can be sucked out by setting the first suction pipe 107, so as to avoid rainwater from outside the foundation pit 116 flowing into the foundation pit 116 and accumulating, which would damage the foundation structure of the foundation pit 116. In this embodiment, the first water pump is a conventional pump body in the prior art, and its structure and function will not be described in detail here.

[0047] In some embodiments, a second suction pipe 108 is installed at the closed end of the second sheet pile 103. After the closed end of the first sheet pile 102 abuts against the inner wall of the foundation pit 116, a cavity is formed between the second sheet pile 103 and the inner wall of the foundation pit 116. When there is rainfall or the soil layer of the foundation pit 116 has a high water content, rainwater and liquid seeping from the soil layer of the inner wall of the foundation pit 116 will enter the cavity. The second suction pipe 108 is connected to the closed end of the second sheet pile 103. The inlet end of the second suction pipe 108 extends downward to the bottom of the cavity. The outlet end of the second suction pipe 108 is used to connect to the second water pump. After the second water pump is started, the liquid and rainwater that have seeped into the cavity from the inner wall of the foundation pit 116 and accumulated at the bottom of the cavity can be sucked out by setting the second suction pipe 108. After the liquid seeping into the cavity from the inner wall of the foundation pit 116 accumulates in the cavity, it will damage the support of the foundation pit 116. In this embodiment, the second water pump is a conventional pump body in the prior art. Its structure and function will not be described in detail here.

[0048] In some embodiments, a water-blocking component 109 is installed on the closed end of the first sheet pile 102. The water-blocking component 109 includes a sliding part 110 and a baffle 111. The sliding part 110 is slidably installed on the closed end of the first sheet pile 102, and the baffle 111 is hinged to the sliding part 110. In this embodiment, the sliding part 110 is slidably installed on the pile body of the first sheet pile 102 extending upward to the foundation pit 116. When it is necessary to block the water flow formed outside the foundation pit 116, the sliding part 110 is slid upward and then the baffle 111 is rotated towards the first sheet pile 102, so that the baffle 111 is inclined on the ground, which can more effectively guide the flow of rainwater and make it easier for rainwater to flow along the inclined surface. This helps to reduce the scouring and seepage of rainwater on the side wall of the foundation pit 116 and reduce the risk of instability of the foundation pit 116. Moreover, the inclined baffle 111 can prevent the water flow formed by rainwater from accumulating at the first root and affecting the stability of the foundation pit support device.

[0049] In some embodiments, the closed end of the first sheet pile 102 is provided with a limiting groove 112, and the sliding part 110 is provided with a limiting protrusion 117 for cooperating with the limiting groove 112. The sliding part 110 is slidably mounted in the limiting groove 112 through the limiting protrusion 117. In this embodiment, the limiting groove 112 is used to limit and guide the limiting protrusion 117, so that the sliding part 110 and the baffle 111 can move stably.

[0050] In some embodiments, a fixing plate 113 is hinged to one end of the baffle 111 away from the sliding part 110. In this embodiment, when the baffle 111 moves upward with the sliding part 110 and rotates toward the first sheet pile 102, the fixing plate 113 is parallel to the ground and always in contact with the ground; by setting the fixing plate 113, the contact area between the inclined baffle 111 and the ground after rotation can be increased, thereby making the inclined baffle 111 more stable.

[0051] In some embodiments, a fixing rod 114 is detachably mounted on the fixing plate 113. In actual use, the fixing rod 114 can be fixedly connected to the ground of the fixing plate 113, or it can be threadedly connected to the fixing plate 113. In this embodiment, the fixing rod 114 is threadedly connected to the fixing plate 113. When the baffle 111 is parallel to and in contact with the ground, rotating the fixing rod 114 threadedly connected to the fixing plate 113 allows the fixing plate 113 to be connected to the ground via the fixing rod 114, thereby further increasing the support effect of the first sheet pile 102 on the inner wall of the pit 116. When the baffle 111 moves upward with the sliding part 110 and rotates toward the first sheet pile 102, the fixing plate 113 remains parallel to and in contact with the ground after moving a certain distance with the baffle 111. At this time, rotating the fixing rod 114 threadedly connected to the fixing plate 113 allows the fixing plate 113 to be connected to the ground via the fixing rod 114, further increasing the stability of the inclined baffle 111.

[0052] In some embodiments, a water-guiding slope 115 is provided at the bottom of the pit 116. In this embodiment, the water-guiding slope 115 is inclined toward the first liquid extraction pipe 107, and the water-guiding slope 115 can guide the liquid accumulated at the bottom of the pit 116, so that the first liquid extraction pipe 107 can extract the liquid accumulated at the bottom of the pit 116.

[0053] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foundation pit support device, characterized in that: It includes a cross bracing mechanism (101), a first sheet pile (102), and a second sheet pile (103), both of which are used to cover the perimeter of the foundation pit (116); The first sheet pile (102) and the second sheet pile (103) are U-shaped. Both the left and right ends of the first sheet pile (102) are provided with bending portions (104). The first sheet pile (102) and the second sheet pile (103) are detachably connected through the bending portions (104). The closed end of the first sheet pile (102) is used to abut against the inner wall of the foundation pit (116). Both the upper and lower ends of the cross bracing mechanism (101) are used to connect with the closed end of the second sheet pile (103). The cross bracing mechanism (101) is used in conjunction with the second sheet pile (103) to support the inner wall of the foundation pit (116).

2. The foundation pit support device according to claim 1, characterized in that: The cross bracing mechanism (101) includes a cross bracing rod (105) and a connecting rod (106). The connecting rod (106) is fixedly connected to the upper and lower ends of the cross bracing rod (105) and is used to connect with the second sheet pile (103).

3. The foundation pit support device according to claim 2, characterized in that: The tops of the first sheet pile (102) and the second sheet pile (103) extend upwards to above the top of the pit (116).

4. A drainage structure, characterized in that: It includes a first pumping pipe (107) and a foundation pit support device as described in any one of claims 1 to 3, wherein the first pumping pipe (107) is installed at the closed end of the first sheet pile (102).

5. A drainage structure according to claim 4, characterized in that: The second sheet pile (103) is equipped with a second liquid extraction pipe (108) at its closed end.

6. A drainage structure according to claim 5, characterized in that: A water-blocking component (109) is installed on the closed end of the first sheet pile (102). The water-blocking component (109) includes a sliding part (110) and a baffle (111). The sliding part (110) is slidably installed on the closed end of the first sheet pile (102), and the baffle (111) is hinged to the sliding part (110).

7. A drainage structure according to claim 6, characterized in that: The closed end of the first sheet pile (102) is provided with a limiting groove (112), and the sliding part (110) is provided with a limiting protrusion (117) for cooperating with the limiting groove (112). The sliding part (110) is slidably installed in the limiting groove (112) through the limiting protrusion (117).

8. A drainage structure according to claim 6, characterized in that: A fixed plate (113) is hinged to one end of the baffle (111) away from the sliding part (110).

9. A drainage structure according to claim 8, characterized in that: A fixing rod (114) is detachably installed on the fixing plate (113).

10. A drainage structure according to claim 4, characterized in that: The bottom of the foundation pit (116) is provided with a water guiding slope (115).

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