Channel structure and construction method

Abstract

Embodiments of the present application disclose a channel structure and a construction method, including: two relatively arranged side walls, each side wall including at least one vertical plate and at least two anti-sliding piles arranged at intervals, both ends of the vertical plate being fixedly connected to two adjacent anti-sliding piles respectively; a bottom plate, both sides of the bottom plate being connected to the vertical plates and the anti-sliding piles of the two side walls to form a trough-shaped channel located under the formation; and support columns arranged under the bottom plate, the support columns being supported between the corresponding anti-sliding piles of the two side walls. The channel structure and the construction method of the embodiments of the present application can have good passing capacity and passing conditions.

Description

Technical Field

[0001] The present application relates to the field of geotechnical engineering, and particularly to a channel structure and a construction method. Background Art

[0002] Slope retaining and protection projects are the key points and difficulties in the construction and operation stages of geotechnical engineering. With the advancement of urban construction and the continuous development of the transportation industry, it is particularly important to ensure the quality and safety of the project and the controlled settlement and deformation of surrounding structures under complex geological conditions. Once the surrounding structures are greatly disturbed by construction and settlement and deformation accidents occur, the consequences are unimaginable, and the relevant rectification and treatment are extremely difficult, with a bad influence.

[0003] Such as Figure 1 As shown, in the prior art, a trough-shaped channel is usually used for construction at the entrance of an urban tunnel. The conventional trough-shaped channel structure mainly uses a U-shaped trough 1' to carry out slope retaining, and combines measures such as slowing down the slope 2', strengthening intercepting and draining water, and slope protection to carry out slope protection. If the site geological conditions are complex, special protection treatments such as diaphragm walls 5' and row piles 6' need to be carried out. Not only is the engineering quantity large, but the construction machinery and equipment for the diaphragm walls 5' and row piles 6' occupy a large space, and the space is limited. Moreover, the equipment itself has a large construction disturbance, which poses a construction hazard to the buildings 9' on both sides of the tunnel, indirectly increasing the construction difficulty. In addition, a portal pile 3' is formed above the U-shaped trough to improve the overall structural strength of the U-shaped trough, but this will limit the height of the vehicle entering the tunnel, having a great impact on the channel passing capacity and passing conditions. Summary of the Invention

[0004] In view of this, the embodiments of the present application are expected to provide a channel structure and a construction method to solve the problem that the channel passing capacity and passing conditions in the prior art are highly restricted.

[0005] To achieve the above object, the technical solution of the embodiments of the present application is realized as follows:

[0006] A channel structure includes: two relatively arranged side walls, each side wall including at least one vertical plate and at least two anti-slide piles arranged at intervals, and both ends of the vertical plate are respectively fixedly connected to two adjacent anti-slide piles; a bottom plate, both sides of the bottom plate are connected to the vertical plates and the anti-slide piles of the two side walls to form a trough-shaped channel located under the ground; and support columns arranged under the bottom plate, the support columns being supported between the corresponding anti-slide piles of the two side walls.

[0007] Further, the cross-sectional shape of the anti-slide pile is polygonal, and the anti-slide pile includes a first side surface, a second side surface, and a third side surface that are sequentially connected; in the same side wall, the first side surface of one of the anti-slide piles is arranged opposite to the third side surface of the adjacent anti-slide pile; one end of the vertical plate is fixedly connected to the first side surface of one of the anti-slide piles, and the other end of the vertical plate is fixedly connected to the third side surface of an adjacent anti-slide pile; one end of the support column is fixedly connected to the second side surface of the anti-slide pile of one of the side walls, and the other end of the support column is fixedly connected to the second side surface of the corresponding anti-slide pile of the other side wall.

[0008] Further, the anti-slide pile is of reinforced concrete structure; and / or, the vertical plate is of reinforced concrete structure; and / or, the bottom plate is of reinforced concrete structure; and / or, the support column is of reinforced concrete structure.

[0009] Further, the anti-slide pile includes a plurality of first steel bar heads, and the first steel bar heads extending outward are provided on both the first side surface and the third side surface. The vertical plate is of reinforced concrete structure, and the steel bars in the vertical plate are welded to the first steel bar heads.

[0010] Further, the vertical plate includes transverse steel bars and longitudinal steel bars, the transverse steel bars and the longitudinal steel bars are arranged vertically and horizontally in a crisscross manner, the transverse steel bars are welded to the first steel bar heads, and the longitudinal steel bars are tied to the transverse steel bars.

[0011] Further, the anti-slide pile includes a plurality of second steel bar heads, and the second steel bar heads extend outward from the second side surface. The bottom plate is of reinforced concrete structure, and the steel bars in the bottom plate are respectively welded to the second steel bar heads and the first steel bar heads.

[0012] Further, the support column is of reinforced concrete structure, and the steel bars in the support column are welded to the second steel bar heads.

[0013] Further, the bottom plate and the vertical plate are integrally cast.

[0014] Further, along the transverse width direction of the bottom plate, the horizontal height of the middle part of the bottom plate is higher than that of both sides.

[0015] Further, drainage ditches are formed on both sides of the bottom plate close to the side wall.

[0016] A construction method for the above channel structure includes: excavating at least four anti-slide pile foundation pits; pouring the anti-slide piles in the anti-slide pile foundation pits, and reserving the first steel bar heads and the second steel bar heads on the anti-slide piles; excavating a soil pit within the connecting area of the four anti-slide piles; in the soil pit, fixedly connecting the steel bars of the support columns to the corresponding second steel bar heads of the anti-slide piles; pouring the support columns; fixedly connecting the steel bars of the vertical plates of one side wall between the first steel bar heads of two anti-slide piles; fixedly connecting the steel bars of the vertical plates of the other side wall between the first steel bar heads of the other two anti-slide piles; in the soil pit, respectively fixedly connecting the steel bars of the bottom plate to the corresponding first steel bar heads, second steel bar heads of the anti-slide piles, and the steel bars of the corresponding vertical plates; in the soil pit, pouring the concrete coating layers of the bottom plate and the vertical plates, and the vertical plates, the bottom plate, and the anti-slide piles form the trough-shaped channel.

[0017] The channel structure and the construction method are provided with two oppositely arranged side walls, a bottom plate, and support columns arranged below the bottom plate. Each side wall includes at least one vertical plate and at least two anti-slide piles arranged at intervals, and both ends of the vertical plate are fixedly connected to two adjacent anti-slide piles respectively; the vertical plate can transfer the internal stress to the anti-slide piles deeply buried in the soil layer, and then be transferred to the soil layer by the anti-slide piles, so as to realize the function of the side wall as a slope retaining structure for slope protection. The bottom plate connects the two side walls to form a trough-shaped channel located under the ground. The support columns are arranged below the bottom plate and do not limit the height of the passing vehicles, and the vehicles can pass freely, so that the channel has good passing capacity and passing conditions. And the support columns are fixedly connected to the anti-slide piles of the side walls to form a three-dimensional structure, effectively strengthening the stiffness of the trough-shaped channel and being able to better bear the internal stress exerted by the soil layer. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a trough-shaped channel at the tunnel entrance in the prior art;

[0019] Figure 2 It is a three-dimensional schematic diagram of the channel structure according to the embodiment of the present application;

[0020] Figure 3 It is Figure 2 The sectional view taken along II-II in

[0021] Figure 4 It is Figure 2 The sectional view taken along I-I in

[0022] Figure 5 It is Figure 2 The sectional view taken along III-III in , where the concrete coating layers of the bottom plate and the vertical plates are omitted;

[0023] Figure 6 The figure is a flow chart of the construction method of the channel structure according to the embodiment of the present application. Specific embodiments

[0024] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. The detailed description in the specific embodiments should be understood as an explanation of the present application and should not be regarded as an improper limitation to the present application.

[0025] In the description of the embodiments of the present application, the orientation or positional relationship of "upper", "lower", "left", "right", "front", "rear" is based on the Figure 2 orientation or positional relationship shown in the attached figure. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0026] A channel structure, as Figures 2 to 5 shown, includes two relatively arranged side walls 1, a bottom plate 2, and support columns 3 arranged below the bottom plate 2.

[0027] Each side wall 1 includes at least one vertical plate 12 and at least two anti-sliding piles 11 arranged at intervals. The two ends of the vertical plate 12 are respectively fixedly connected to two adjacent anti-sliding piles 11; the soil layer 7 is affected by its own gravity and the gravity of the buildings 9 on both sides of the channel structure, and continuously applies internal stress to the channel structure. The vertical plate 12 transfers the internal stress to the anti-sliding piles 11 deeply buried in the soil layer 7, and then the anti-sliding piles 11 transfer it to the soil layer 7 and the vertical plate 12, so as to realize the function of the side wall 1 as a slope retaining structure to carry out slope protection.

[0028] Both sides of the bottom plate 2 are connected to the vertical plates 12 and anti-sliding piles 11 of the two side walls 1 to form a trough-shaped channel 4 located under the formation 7. Specifically, both sides of the bottom plate 3 can be respectively fixedly connected to the lower ends of two vertical plates 2, and the cross-section is in a U shape. The corresponding areas of the anti-sliding piles 11 and the bottom plate 3 can also be fixedly connected. The trough-shaped channel 4 with an open top and extending along the direction of the side wall 1 is enclosed by the bottom plate 3, the vertical plate 1 and the anti-sliding pile 11; it is used for the entrance of an urban tunnel. For example, for a cross-river tunnel, the tunnel entrance usually extends obliquely downward. It can be understood that a top cover can also be added to the top of the trough-shaped channel 4 to form a channel that is enclosed on all sides and extends at both ends, specifically subject to the actual design.

[0029] In addition, by integrally designing and connecting the bottom plate 2, the anti-sliding piles 11 and the vertical plates 12, not only can the additional stress caused by the gravity of the soil layer 7 and the buildings 9 on both sides of the channel structure be transferred, but also the groundwater pressure borne by the bottom plate 2 and the vertical plates 12 can be integrally transferred to the anti-sliding piles 11, effectively solving the anti-floating effect.

[0030] In the prior art, as Figure 1 shown, the portal pile 3' is arranged above the U-shaped groove 1', thus forming a square-shaped entrance, which limits the height of the passing vehicle, and thus has a great impact on the channel passing capacity and passing conditions.

[0031] In the embodiment of the present application, the support column 3 is arranged below the bottom plate 2, which will not limit the height of the passing vehicle, and the vehicle can pass freely, which is beneficial to optimizing the channel passing capacity and passing conditions. Moreover, the support column 3 is supported between the corresponding anti-slide piles 11 of the two side walls. One end of the support column 3 is fixedly connected to the anti-slide pile 11 of one side wall 1, and the other end of the support column 3 is fixedly connected to the corresponding anti-slide pile 11 of the other side wall 1, thus forming a three-dimensional structure, thereby strengthening the stiffness of the trough-shaped channel 4 and being able to better withstand the internal stress applied by the soil layer 7.

[0032] A possible embodiment, as Figures 2 to 5 shown, the cross-sectional shape of the anti-slide pile 11 is polygonal.

[0033] It should be understood that different from circular piles, the cross-sectional shape being polygonal has a greater shear stress resistance. When the diameter of the circular pile is equivalent to the side length of the polygon, the circular pile has a weaker ability to resist shear stress. In the prior art, the diaphragm wall 5' and the row piles 6' are both circular piles, and the portal pile 3' is also a circular pile. The circumferential surface of the circular pile is not convenient for lapping the transverse support rod (i.e., the top cross bar of the portal pile 3') in the middle of the pile. Therefore, usually the transverse support rod of the portal pile 3' is arranged at the end of the circular pile, which also causes the transverse support rod of the portal pile 3' not to be arranged at the bottom of the U-shaped groove 1'.

[0034] In the embodiment of the present application, the anti-slide pile 11 can be a square pile. Thus, it is convenient to connect the support column 3 at any position. Specifically, in the horizontal and straight tunnel entrance section, the support column 3 can be arranged horizontally, and the anti-slide piles 11 of the two side walls 1 are directly opposite to each other. Thus, the support column 3 is supported between the corresponding two anti-slide piles 11, improving the structural strength. The supporting direction of the support column 3 is perpendicular to the extending direction of the channel structure. In the inclined downward or turning tunnel entrance section, the support column 3 can be arranged obliquely, and the anti-slide piles 11 of the two side walls 1 are staggered, and the support column 3 is obliquely supported between the corresponding two anti-slide piles 11, improving the structural strength.

[0035] A possible embodiment, as Figures 2 to 5As shown in the figure, the anti-slide pile 11 includes a first side surface 111, a second side surface 112, and a third side surface 113 that are sequentially connected. Among two adjacent anti-slide piles 11 of the same side wall 1, the first side surface 111 of one anti-slide pile 11 is disposed opposite to the third side surface 113 of the adjacent anti-slide pile 11. One end of the vertical plate 12 is fixedly connected to the first side surface 111 of one anti-slide pile 11, and the other end of the vertical plate 12 is fixedly connected to the third side surface 113 of an adjacent anti-slide pile 11. One end of the support column 3 is fixedly connected to the second side surface 112 of the anti-slide pile 11 of one side wall 1, and the other end of the support column 3 is fixedly connected to the second side surface 112 of the corresponding anti-slide pile 11 of the other side wall 1. The vertical plate 12 transmits the internal stress from the soil layer 7 to the first side surface 111 and the third side surface 113, and then transmits it to the anti-slide pile 11, and finally transmits it to the soil layer 7, so as to realize the slope retaining function of the side wall 1 on the surrounding soil layer 7.

[0036] In a possible embodiment, the anti-slide pile 11 can be a steel structure or a reinforced concrete structure. The vertical plate 12 can be a steel structure or a reinforced concrete structure. The bottom plate 2 can be a steel structure or a reinforced concrete structure. The support column 3 can be a steel structure or a reinforced concrete structure. The use of a reinforced concrete structure has the advantages of strong corrosion resistance and convenient construction. The connection between the anti-slide pile 11, the vertical plate 12, the bottom plate 2, the support column 3, etc. can also adopt the form of first bundling and welding the steel bars and then pouring the concrete integrally, with strong overall waterproofness and can effectively prevent the channel structure from seeping water.

[0037] In a possible embodiment, as Figures 2 to 5 shown in the figure, the anti-slide pile 11 includes a plurality of first steel bar heads 115. The first side surface 111 and the third side surface 113 are both provided with first steel bar heads 115 extending outward, so as to form reserved steel bar heads. The vertical plate 12 is a reinforced concrete structure, and the steel bars in the vertical plate 12 are welded to the first steel bar heads 115, so that the vertical plate 12 is firmly connected to the anti-slide pile 11, and then the outer concrete coating (not marked) is poured later.

[0038] There are various setting forms of the steel bars of the vertical plate 12. Generally, as Figure 5 shown in the figure, the vertical plate 12 includes transverse steel bars 121 and longitudinal steel bars 122. The transverse steel bars 121 and the longitudinal steel bars 122 are arranged horizontally and vertically in a staggered manner. The transverse steel bars 121 are welded to the first steel bar heads 115, and the longitudinal steel bars 122 are tied or welded to the transverse steel bars 121. The internal stress from the soil layer 7 received by the vertical plate 12 is transmitted to the first side surface 111 and the third side surface 113 through the first steel bar heads 115, and then transmitted to the anti-slide pile 11, and finally transmitted to the soil layer 7, realizing the slope retaining function of the side wall 1 on the surrounding soil layer 7.

[0039] In a possible embodiment, asFigures 2 to 5 As shown in the figure, the anti-slide pile 11 includes a plurality of second steel bar heads 116, and the second steel bar heads 116 extend outward from the second side surface 112. The bottom plate 2 is a reinforced concrete structure, and the steel bars 2a in the bottom plate 2 are respectively welded to the second steel bar heads 116 and the first steel bar heads 115. That is, a part of the bottom plate 2 is connected to the anti-slide pile 11, and the other part is connected to the vertical plate 12. The gravity of the vehicle is transmitted to the anti-slide pile 11 through the second steel bar heads 116 and the first steel bar heads 115, and finally transmitted to the soil layer 7, so as to realize the function of the bottom plate 2 bearing the passage of the vehicle.

[0040] A possible embodiment is as Figure 5 As shown in the figure, the support column 3 is a reinforced concrete structure, and the steel bar 3a in the support column 3 is welded to the second steel bar head 116. It can be understood that there are a plurality of second steel bar heads 116. The second steel bar heads 116 on the upper side are welded to the steel bars 2a in the bottom plate 2 to realize the connection between the bottom plate 2 and the anti-slide pile 11, and the second steel bar heads 116 on the upper side are welded to the steel bars 3a in the support column 3. By preferentially bundling and fixing the steel bars of the bottom plate 2 and the vertical plate 12 and then integrally pouring to form a reinforced concrete structure, the overall waterproof performance is strong, and the water seepage of the channel structure can be effectively prevented.

[0041] A possible embodiment is as Figure 3 As shown in the figure, along the transverse width direction of the bottom plate 2, the horizontal height in the middle of the bottom plate 2 is higher than the horizontal heights on both sides. Specifically, the surface of the bottom plate 2 forms a "V"-shaped slope transversely, and the slope rate angle A is not less than 4%, so as to ensure that the accumulated water on the bottom plate 2 can be timely collected on both sides and then discharged through the remaining structures.

[0042] A possible embodiment is as Figure 3 As shown in the figure, drainage ditches 21 are formed on both sides of the bottom plate 2 close to the side wall 1. The drainage ditches 21 can be directly drained by setting a waterproof layer (not marked), or can be used for laying drainage pipes (not marked). After the accumulated water collected on both sides of the bottom plate 2 is collected by the drainage pipes, it is discharged in time to avoid water accumulation and seepage in the channel structure.

[0043] A construction method of a channel structure includes:

[0044] S10. Excavate at least four anti-slide pile foundation pits. The connection lines of the four anti-slide pile foundation pits can generally form a rectangle.

[0045] S20. Pour the anti-slide pile 11 in the anti-slide pile foundation pit, and reserve the first steel bar head 115 and the second steel bar head 116 on the anti-slide pile 11.

[0046] S30. Excavate a soil pit in the connection area of the four anti-slide piles 11.

[0047] S40. In the soil pit, fixedly connect the steel bars of the support column 3 with the second steel bar heads 116 of the corresponding anti-slide piles 11.

[0048] S50. Pour the support column 3.

[0049] S60. Fix the steel bars of the vertical plate 12 of one side wall 1 between the first steel bar heads 115 of two anti-slide piles 11; fix the steel bars of the vertical plate 12 of the other side wall 1 between the first steel bar heads 115 of the other two anti-slide piles 11.

[0050] S70. In the soil pit, fixedly connect the steel bars of the bottom plate 2 with the first steel bar heads 115, the second steel bar heads 116 of the corresponding anti-slide piles 11, and the steel bars of the corresponding vertical plate 12 respectively.

[0051] S80. In the soil pit, pour the concrete coating of the bottom plate 2 and the vertical plate 12. The vertical plate 12, the bottom plate 2, and the anti-slide piles 11 form a trough-shaped channel 4.

[0052] Repeat the above steps to connect multiple small-section trough-shaped channels 4, and finally form a channel structure for vehicles to pass through.

[0053] The various embodiments provided in this application can be combined with each other without contradiction.

[0054] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A channel structure, characterized in that, it includes: Two relatively arranged side walls (1), each of the side walls (1) includes at least one vertical plate (12) and at least two anti-sliding piles (11) arranged at intervals, and both ends of the vertical plate (12) are respectively fixedly connected to two adjacent anti-sliding piles (11); A bottom plate (2), both sides of the bottom plate (2) are connected to the vertical plates (12) and the anti-sliding piles (11) of the two side walls (1) to form a trough-shaped channel (4) underground; And support columns (3) arranged below the bottom plate (2), and the support columns (3) are supported between the corresponding anti-sliding piles (11) of the two side walls; The anti-sliding pile (11) includes a first side surface (111), a second side surface (112) and a third side surface (113) connected in sequence. In the same side wall (1), the first side surface (111) of one of the anti-sliding piles (11) is arranged opposite to the third side surface (113) of the adjacent anti-sliding pile (11), one end of the support column (3) is fixedly connected to the second side surface (112) of the anti-sliding pile (11) of one of the side walls (1), and the other end of the support column (3) is fixedly connected to the second side surface (112) of the corresponding anti-sliding pile (11) of the other side wall (1); The support column (3) is of reinforced concrete structure.

2. The channel structure according to claim 1, characterized in that, The cross-sectional shape of the anti-sliding pile (11) is polygonal, one end of the vertical plate (12) is fixedly connected to the first side surface (111) of one of the anti-sliding piles (11), and the other end of the vertical plate (12) is fixedly connected to the third side surface (113) of an adjacent anti-sliding pile (11).

3. The channel structure according to claim 1, characterized in that, The anti-sliding pile (11) is of reinforced concrete structure; and / or, the vertical plate (12) is of reinforced concrete structure; and / or, the bottom plate (2) is of reinforced concrete structure.

4. The channel structure according to claim 2, characterized in that, The anti-sliding pile (11) includes a plurality of first steel bar heads (115), and the first steel bar heads (115) extending outwards are arranged on both the first side surface (111) and the third side surface (113). The vertical plate (12) is of reinforced concrete structure, and the steel bars in the vertical plate (12) are welded to the first steel bar heads (115).

5. The channel structure according to claim 4, characterized in that, The vertical plate (12) includes transverse steel bars (121) and longitudinal steel bars (122), the transverse steel bars (121) and the longitudinal steel bars (122) are arranged vertically and horizontally, the transverse steel bars (121) are welded to the first steel bar heads (115), and the longitudinal steel bars (122) are tied to the transverse steel bars (121).

6. The channel structure according to claim 4 or 5, characterized in that, The anti-slide pile (11) includes a plurality of second steel bar heads (116), and the second steel bar heads (116) extend outward from the second side surface (112). The bottom plate (2) is a reinforced concrete structure, and the steel bars in the bottom plate (2) are respectively welded to the second steel bar heads (116) and the first steel bar heads (115).

7. The channel structure according to claim 1, characterized in that the bottom plate (2) and the vertical plate (12) are integrally cast.

8. The channel structure according to claim 1, characterized in that along the transverse width direction of the bottom plate (2), the horizontal height of the middle part of the bottom plate (2) is higher than the horizontal heights of both sides.

9. The channel structure according to claim 1 or 8, characterized in that drainage ditches (21) are formed on both sides of the bottom plate (2) close to the side wall (1).

10. A construction method of the channel structure according to claim 6, characterized in that it includes: excavating at least four anti-slide pile foundation pits; pouring the anti-slide pile (11) in the anti-slide pile foundation pits, and reserving the first steel bar head (115) and the second steel bar head (116) on the anti-slide pile (11); excavating a soil pit in the connecting area of the four anti-slide piles (11); in the soil pit, fixedly connecting the steel bars of the support column (3) with the corresponding second steel bar heads (116) of the anti-slide pile (11); pouring the support column (3); fixing the steel bars of the vertical plate (12) of the side wall (1) between the first steel bar heads (115) of the two anti-slide piles (11); fixing the steel bars of the vertical plate (12) of the side wall (1) between the first steel bar heads (115) of the other two anti-slide piles (11); in the soil pit, fixedly connecting the steel bars of the bottom plate (2) with the corresponding first steel bar heads (115), the second steel bar heads (116) of the anti-slide pile (11), and the steel bars of the corresponding vertical plate (12); in the soil pit, pouring the concrete coating of the bottom plate (2) and the vertical plate (12), and the vertical plate (12), the bottom plate (2), and the anti-slide pile (11) form the trough-shaped channel (4).

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