In-situ protection structure for rectangular jacking pipe passing through existing sewage pipeline downwards

Abstract

The utility model discloses an in-situ protection structure for a rectangular jacking pipe passing through an existing sewage pipeline, which comprises positioning piles which are sequentially connected by a plurality of U-shaped grooves and are symmetrically distributed on two sides of the existing pipeline; the reinforcing layer is located at the bottoms of the positioning piles and the existing pipeline and comprises a reinforcing bottom plate, a fine sand layer is laid on the top of the reinforcing bottom plate, a structural layer is formed on the fine sand layer in a pouring mode, and a supporting plate used for supporting the existing pipeline is pre-buried in the structural layer; positioning piles are inserted into a soil layer, the multiple positioning piles are sequentially connected to form positioning pile sets, the positioning pile sets are symmetrically distributed at the two ends of an existing pipeline, an excavation space is limited, the soil layer in the excavation space is excavated out, a reinforcing bottom plate, a fine sand layer and a structural layer are sequentially laid at the bottom, and therefore the positioning pile sets are formed. A supporting table top for the lower end of the existing pipeline is formed, and the supporting plate is connected to the upper end face of the structural layer to support the existing pipeline.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of sewage pipeline construction technology, specifically relates to a rectangular pipe jacking underpass existing sewage pipeline in situ protection structure. BACKGROUND

[0002] With the rapid development of large pipe jacking engineering, the application in city underground engineering construction is more and more widely, but when existing large sewage pipe exists in the pipe jacking construction process, the traditional method is to move or repair the pipe lining to the existing pipeline. The pipe lining repair leads to the reduction of the pipeline flow and cannot meet the working requirements of the pipeline. If there is no temporary relocation condition in the construction site, due to the lack of reinforcement protection structure for the existing pipeline, the existing sewage pipeline is sunk or floated due to soil displacement in the pipe jacking process, which is easy to cause displacement and leakage of the sewage pipe, and even damage. UTILITY MODEL CONTENTS

[0003] In order to solve the above problems existing in the prior art, the utility model aims at providing a rectangular pipe jacking underpass existing sewage pipeline in situ protection structure.

[0004] The utility model adopts the technical scheme of comprising:

[0005] The positioning pile is connected in sequence by a plurality of U-shaped grooves and is symmetrically distributed on both sides of the existing pipeline.

[0006] The reinforcing layer is located at the bottom of the positioning pile and the existing pipeline, and comprises a reinforcing bottom plate, a fine sand layer is laid on the top of the reinforcing bottom plate, a structure layer is formed by pouring on the fine sand layer, a support bracket for supporting the existing pipeline is pre-embedded in the structure layer, and a steel mesh frame is connected on both sides of the support bracket.

[0007] The positioning stop column is installed in the positioning pile, the peripheral surface of the positioning stop column abuts against the steel mesh frame, and the lower end of the positioning stop column is fixedly connected with the reinforcing bottom plate.

[0008] As a preferred embodiment of the utility model, the two ends of the U-shaped groove are formed with connecting grooves, a plurality of U-shaped grooves are connected in sequence by the connecting grooves and form a positioning pile group, and the positioning pile group is symmetrically distributed along the existing pipeline.

[0009] As a preferred embodiment of the utility model, the upper end of the U-shaped groove is provided with a mounting hole, the top of the U-shaped groove is provided with a cross beam, and the two ends of the cross beam are fixedly connected with two groups of positioning pile groups respectively.

[0010] As a preferred embodiment of the utility model, a spacing is formed between the positioning pile group and the existing pipeline, side plates are connected at the two ends of the two groups of positioning pile groups, and the side plates are connected with the U-shaped grooves through the connecting grooves.

[0011] The utility model discloses a fixing hook is equipped with in the bottom of crossbeam.

[0012] As the preferred utility model, the reinforcing bottom plate comprises a first bottom plate and a second bottom plate, and the first bottom plate and the second bottom plate are fixedly connected through connecting threaded holes formed thereon.

[0013] As the preferred utility model, a blocking column mounting groove is formed in the reinforcing bottom plate, the blocking column mounting groove is used for mounting and connecting the positioning blocking column, and a plurality of positioning blocking columns are arranged.

[0014] As the preferred utility model, a reinforcing rod is fixedly arranged at the bottom of the supporting plate, and the reinforcing rod is embedded into the structure layer.

[0015] The utility model discloses a fixing hook is equipped with in the bottom of crossbeam.

[0016] The utility model discloses a kind of rectangular top pipe underpassing existing sewage pipeline in situ protection structure, by inserting into and connecting positioning pile to soil layer, and a plurality of positioning piles are sequentially connected to form positioning pile group, one positioning pile group is symmetrically distributed at the both ends of existing pipeline, forming the limit of excavation space, by excavating the soil layer in excavation space, and reinforcing bottom plate, fine sand layer and structure layer are sequentially laid in bottom, form the support platform to the lower end of existing pipeline, and by connecting supporting plate on the upper end surface of structure layer, existing pipeline is supported, while, the end of supporting plate is abutted and limited, by preventing reinforcing mesh frame between positioning blocking column and supporting plate, it can be realized that the strength of whole structure is strengthened after concrete solidification while abutting and limiting supporting plate, after reinforcing mesh frame is placed and limited connection, by pouring concrete on the upper end surface of structure layer, it forms hoop type reinforcing fixation to existing pipeline after concrete solidification, to improve the stability of existing pipeline in soil layer, can realize the reinforcement to its bottom under the condition of ensuring the normal operation of existing pipeline, to avoid that the position of existing pipeline is easily changed or deformed due to underpassing. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be explained in further detail in connection with the drawings and specific implementation method.

[0018] Figure 1 It is the structure schematic diagram of the utility model;

[0019] Figure 2 It is the front view structure schematic diagram of the utility model;

[0020] Figure 3 It is the plan structure schematic diagram of the utility model;

[0021] Figure 4 It is the side sectional structure schematic diagram of the utility model;

[0022] Figure 5 This is a utility model Figure 1 Enlarged structural diagram at point A in the diagram;

[0023] Figure 6 This is a structural schematic diagram of the reinforced base plate of this utility model;

[0024] Figure 7 This is a structural schematic diagram of the second embodiment of the construction of this utility model.

[0025] In the diagram: 1. Positioning pile; 2. Reinforcement layer; 3. Positioning retaining column; 4. Side plate; 5. Crossbeam; 6. Existing pipeline; 7. Rectangular pipeline; 11. U-shaped channel; 12. Connecting channel; 21. Reinforced base plate; 22. Fine sand layer; 23. Structural layer; 24. Support plate; 25. Steel mesh frame; 51. Hook; 111. Mounting hole; 211. First base plate; 212. Second base plate; 213. Retaining column mounting groove; 214. Connecting threaded hole; 241. Reinforcing rod. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] The following is combined with Figures 1-7 This invention describes a specific embodiment of a rectangular jacking pipe under an existing sewage pipeline, comprising:

[0029] Positioning pile 1 consists of multiple U-shaped grooves connected in sequence and symmetrically distributed on both sides of the existing pipeline 6. When the existing pipeline 6 is passed under a rectangular pipe without temporary relocation conditions, it avoids squeezing and damage to the existing pipeline during the passing process. By reinforcing the perimeter of the existing pipeline 6, it ensures that the existing pipeline can be reinforced under normal sewage discharge conditions. During construction, the roadbed surface is first broken up and the pit is excavated using the open excavation method. Mechanical operation is used to excavate to 1 meter from the top of the existing pipeline 6. Then, the soil around the existing pipeline 6 is removed by manual excavation. Positioning pile 1 is used to limit the excavation range. After the roadbed is broken up, the U-shaped grooves are inserted into the soil layer in sequence to limit the construction space and prevent soil from falling from the inner wall in the height direction to the bottom of the pit during the soil excavation process.

[0030] Reinforcement layer 2, located at the bottom of the positioning pile 1 and the existing pipeline 6, is used to reinforce the support of the bottom of the existing pipeline 6. Reinforcement layer 2 includes a reinforcement base plate 21, on which a fine sand layer 22 is laid. A structural layer 23 is poured on top of the fine sand layer 22. A support plate 24 for supporting the existing pipeline 6 is pre-embedded within the structural layer 23. Steel mesh 25 is connected to both sides of the support plate 24. After the soil at the bottom of the existing pipeline 6 is removed, the existing pipeline 6 is manually excavated, and reinforcement is applied to the bottom of the existing pipeline 6. A reinforced base plate 21 is laid, which is formed by splicing a first base plate 211 and a second base plate 212. The base plate can move to the bottom of the existing pipe 6 along the interval between the existing pipe 6 and the positioning pile 1. The purpose of the connecting groove 12 is to provide support for the positioning column 3. At the same time, its periphery abuts against the positioning pile 1 and the steel mesh 25 respectively, so as to support and limit the position of the support plate 24 on the existing pipe 6 and prevent the support plate 24 from moving when pouring concrete. The fine sand layer 22 and the structural layer 23 are used to strengthen the support strength of the existing pipe 6.

[0031] The positioning stop post 3 is installed inside the positioning pile 1. Its circumference abuts against the steel mesh frame 25, and its lower end is fixedly connected to the reinforcing base plate 21. The positioning stop post 3 is used to abut against the steel mesh frame 25, and the other end of the steel mesh frame 25 abuts against the support plate 24.

[0032] Please refer to Figure 1 and Figure 4As shown, the two ends of the U-shaped channel have connecting grooves 12. Multiple U-shaped channels are connected sequentially through the connecting grooves 12 to form a group of positioning piles 1. The group of positioning piles 1 is symmetrically distributed along the existing pipeline 6. The two ends of the U-shaped channel have connecting grooves 12 respectively. The connecting grooves 12 are used for sequential connection between multiple U-shaped channels. By sequentially connecting multiple U-shaped channels to form a group of positioning piles 1, and symmetrically distributing a group of positioning piles 1 along both ends of the existing pipeline 6, the construction area is defined, and the soil outside the construction area is supported and blocked to prevent the external soil from falling into the construction space.

[0033] Please refer to Figure 1 and Figure 5 As shown, the upper end of the U-shaped channel is provided with an installation hole 111, and the top of the U-shaped channel is provided with a crossbeam 5. The two ends of the crossbeam 5 are respectively fixedly connected to the two sets of positioning piles 1. When the foundation pit is excavated to a certain depth, in order to prevent the two sets of positioning piles 1 from tilting inward, the crossbeam 5 is connected to the upper end of the positioning piles 1 to connect and support the two sets of positioning piles 1, thereby preventing the positioning piles 1 from tilting.

[0034] Please refer to Figures 1-3 As shown, the positioning pile group 1 forms a gap with the existing pipeline 6 to facilitate the placement of the reinforcing base plate 21 and the steel mesh 25 into the foundation pit. The two ends of the two groups of positioning piles 1 are connected with side plates 4. The side plates 4 are connected to the U-shaped groove through the connecting groove 12. After the steel mesh 25 is placed inside the foundation pit, concrete is poured into the bottom of the foundation pit to solidify the concrete and form a reinforcing structural layer 23 for the existing pipeline 6. The steel mesh 25 is used to enhance the overall strength of the concrete after solidification. The two side plates 4 are used to restrict the pouring space and prevent leakage from the outside of the foundation pit when pouring concrete.

[0035] Please refer to Figure 1 and Figure 5 As shown, a hook 51 is fixedly provided at the bottom of the crossbeam 5. An electric hoist or other lifting device can be connected to the hook 51. On the one hand, it facilitates the transportation of soil during manual excavation. On the other hand, it can realize the transportation of materials into the foundation pit, including sand, gravel and steel mesh 25 and other components.

[0036] Please refer to Figure 6As shown, in one embodiment at the bottom of the foundation pit, the reinforced base plate 21 includes a first base plate 211 and a second base plate 212. The first base plate 211 and the second base plate 212 are fixedly connected by connecting threaded holes 214. When installing the reinforced base plate 21, since the gap formed between the existing pipe 6 and the positioning pile 1 cannot meet the requirements for moving the entire reinforced base plate 21, the reinforced base plate 21 is divided into a detachable first base plate 211 and a second base plate 212 to facilitate the movement and handling of the reinforced base plate 21. After the reinforced base plate 21 is moved to the bottom of the foundation pit, it becomes a support platform. A layer of sand and gravel can be laid on its end face to form a concrete structure layer 23. A steel mesh frame 25 and a support plate 24 are placed on the structure layer 23. After the support plate 24 and the steel mesh frame 25 are locked in place, concrete is finally poured on the top surface of the existing pipe 6 on the upper end face of the concrete structure layer 23. After the concrete solidifies, it forms a clamp-like wrap around the existing pipe 6. Laying the reinforced base plate 21 at the bottom of the foundation pit is suitable for the soil layer at the bottom of the foundation pit to be relatively loose or for the existence of local subsidence pits.

[0037] Please refer to Figure 7 As shown, in another embodiment of the reinforcement of the bottom of the foundation pit, when the soil structure at the bottom of the excavated foundation pit is tight, a sand and gravel layer and a structural layer 23 can be laid directly at the bottom of the foundation pit, eliminating the need for the installation of the reinforcement base plate 21. This can reduce construction costs while ensuring the reinforcement strength of the existing pipeline 6. In the above construction scheme, the positioning column 3 can be positioned and inserted into the soil layer at the bottom of the foundation pit to achieve the positioning of the positioning column 3.

[0038] Please refer to Figure 3 As shown, the reinforced base plate 21 has a retaining post mounting groove 213, which is used for the installation and connection of the positioning retaining post 3. There are multiple positioning retaining posts 3, which are used to support multiple points of the existing pipeline 6. In this embodiment, the positioning retaining posts 3 are all tangentially abutted to the steel mesh frame 25, and their other ends are in contact with the positioning pile 1. The end of the steel mesh frame 25 away from the positioning retaining post 3 is in contact with the support plate 24.

[0039] Please refer to Figure 4 As shown, a reinforcing rod 241 is fixedly provided at the bottom of the support plate 24. The reinforcing rod 241 is pre-embedded and extends into the structural layer 23. The bottom of the support plate 24 is fixedly connected to the reinforcing rod 241, and the lower end of the reinforcing rod 241 extends into the structural layer 23, so as to realize the multi-directional support and positioning of the support plate 24.

[0040] Working principle of this utility model:

[0041] Determine the dimensions of the foundation pit within the area where the existing sewer pipe intersects with the underpass rectangular jacking pipe;

[0042] The roadbed was broken up, and the concrete fragments on the roadbed were moved and transferred until the soil layer was exposed.

[0043] According to the determined range size, the positioning pile 1 is driven in, multiple positioning piles 1 are driven in for positioning, and the multiple positioning piles 1 are connected in sequence, and multiple U-shaped grooves are symmetrically distributed on both sides of the existing pipeline 6.

[0044] The soil layer was mechanically excavated using the open-cut method until it reached 1 meter from the top surface of the existing pipeline 6. Then, the soil layer surrounding the existing pipeline 6 was removed using the manual excavation method.

[0045] When there are localized pits or low compaction at the bottom of the foundation pit, the excavation is carried out manually until the bottom surface of the existing pipe 6 is flush with the surface. Then, the excavation is continued downwards for 40-60cm, and a reinforcing base plate 21 is placed at the bottom. Since the reinforcing base plate 21 is formed by splicing the first base plate 211 and the second base plate 212, and a certain gap is formed between the existing pipe 6 and the positioning pile 1, the reinforcing base plate 21 can be moved to the bottom of the foundation pit. In addition, since both ends of the existing pipe 6 are still buried in the layer, the excavation of the foundation pit is only a small section of the pipe, and the existing pipe 6 will not fall off. During the excavation of the foundation pit, to prevent the positioning retaining column 3 from tipping over, a crossbeam 5 is set on its top for connection, so as to realize the anti-tipping connection between the U-shaped grooves on both sides of the existing pipe 6.

[0046] After the reinforcement base plate 21 is laid, a fine sand layer 22 and a structural layer 23 are laid on top of the reinforcement base plate 21 in sequence. The reinforcing rod 241 fixed at the bottom of the steel mesh frame 25 is pre-embedded in the structural layer 23 to improve the stability of the support plate 24 on the structural layer 23. At the same time, it is ensured that the top of the support plate 24 abuts against the bottom support of the existing pipe 6. Then, the steel mesh frame 25 is placed on one side of the support plate 24 so that the left and right ends of the steel mesh frame 25 abut against the positioning column 3 and the support plate 24 respectively. After the steel mesh frame 25 is installed and positioned, concrete is poured into the pit so that the concrete solidifies to form a clamp-like reinforcement fixation for the existing pipe 6.

[0047] When the soil at the bottom of the foundation pit is highly compacted, the manual excavation method only needs to excavate to the level of the top surface of the existing pipeline 6. After the excavation is completed, the positioning column 3 is inserted and positioned in the soil layer, and the end face of the positioning column 3 is made to abut against the U-shaped groove. Then, the fine sand layer 22 and the structural layer 23 are laid. At the same time as laying the structural layer 23, the support plate 24 is placed, so that the reinforcing rod 241 in the support plate 24 is positioned in the structural layer 23. After the structural layer 23 solidifies, the steel mesh frame 25 is placed, and the position of the steel mesh frame 25 is limited so that its two ends abut against the positioning column 3 and the support plate 24 respectively. After the steel mesh frame 25 is installed and limited, concrete is poured so that the surface of the poured concrete is close to the tangent point of the existing pipeline 6, so that the concrete solidifies to form a clamp-like reinforcement of the existing pipeline 6.

[0048] The existing pipeline 6 was reinforced by backfilling the foundation pit with soil and repairing the roadbed surface.

[0049] During concrete pouring, a thin film layer can be placed in the pouring space to facilitate the separation of the positioning pile 1 after the concrete has solidified. At the same time, it can also avoid the removal of the positioning pile 1 and the positioning retaining column 3, and the soil can be directly backfilled into the foundation pit.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A rectangular pipe jacking structure for in-situ protection of existing sewage pipelines, characterized in that, include: The positioning piles (1) are made up of multiple U-shaped grooves connected in sequence and symmetrically distributed on both sides of the existing pipeline (6); The reinforcement layer (2) is located at the bottom of the positioning pile (1) and the existing pipeline (6). It includes a reinforcement base plate (21), a fine sand layer (22) is laid on the top of the reinforcement base plate (21), a structural layer (23) is poured on the fine sand layer (22), a support plate (24) for supporting the existing pipeline (6) is pre-embedded in the structural layer (23), and a steel mesh frame (25) is connected to both sides of the support plate (24). The positioning stop (3) is installed inside the positioning pile (1), its circumference abuts against the steel mesh frame (25), and its lower end is fixedly connected to the reinforcing base plate (21).

2. The in-situ protection structure for rectangular pipe jacking under existing sewage pipelines according to claim 1, characterized in that: The two ends of the U-shaped groove are connected by connecting grooves (12). Multiple U-shaped grooves are connected in sequence through the connecting grooves (12) to form a group of positioning piles (1). The group of positioning piles (1) is symmetrically distributed along the existing pipeline (6).

3. The in-situ protection structure for rectangular pipe jacking under existing sewage pipelines according to claim 2, characterized in that: The upper end of the U-shaped groove is provided with an installation hole (111), and the top of the U-shaped groove is provided with a crossbeam (5). The two ends of the crossbeam (5) are respectively fixedly connected to two sets of positioning piles (1).

4. The in-situ protection structure for rectangular pipe jacking under existing sewage pipelines according to claim 3, characterized in that: The positioning piles (1) are spaced apart from the existing pipeline (6). The two ends of the two positioning piles (1) are connected with side plates (4), and the side plates (4) are connected to the U-shaped groove through the connecting groove (12).

5. The in-situ protection structure for rectangular pipe jacking under existing sewage pipelines according to claim 3, characterized in that: The bottom of the crossbeam (5) is fixed with a hook (51).

6. The in-situ protection structure for rectangular pipe jacking under existing sewage pipelines according to claim 1, characterized in that: The reinforced base plate (21) includes a first base plate (211) and a second base plate (212), which are fixedly connected by a connecting threaded hole (214) provided thereon.

7. The in-situ protection structure for rectangular pipe jacking under existing sewage pipelines according to claim 6, characterized in that: The reinforced base plate (21) is provided with a retaining column mounting groove (213), which is used for the installation and connection of the positioning retaining column (3). There are multiple positioning retaining columns (3), which are used to support multiple points of the existing pipeline (6).

8. The in-situ protection structure for rectangular pipe jacking under existing sewage pipelines according to claim 1, characterized in that: The bottom of the support plate (24) is fixedly provided with a reinforcing rod (241), which is embedded in the structural layer (23).

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