Construction method of underground structure under road for protecting pipeline by using temporary pipe gallery

Abstract

The invention discloses a construction method of an underground structure under a road for protecting pipelines by using a temporary pipe gallery. The construction method comprises the following steps: S1, dividing a pipe gallery area; earth excavation is conducted in the pipe gallery area, and a pipe gallery space is formed; s2, a foundation pit is excavated at the road, and pipelines are moved into the pipe gallery space in the excavation process; s3, after excavation of the foundation pit is completed, construction of a newly-built underground structure is conducted in the foundation pit; s4, after construction of the newly-built underground structure is completed, earthwork above the newly-built underground structure is backfilled, and the pipeline is moved out of the pipe gallery space into the earthwork above the newly-built underground structure; s5, after all the pipelines in the pipe gallery space are moved out, the pipe gallery space is backfilled, and the road is constructed again; the temporary pipe gallery is constructed on one side of the road to temporarily place the pipeline below the road, the pipeline only needs to be cut off in a short time during moving and can be connected again and normally used after being moved to the pipe gallery, and the influence of underground structure construction on the pipeline is reduced.

Description

Technical Field

[0001] This invention relates to the field of building construction, and more specifically to a method for constructing underground structures beneath roads using temporary utility tunnels to protect pipelines. Background Technology

[0002] When constructing underground structures under roads, it is necessary to excavate foundation pits. During the excavation process, it is necessary to deal with the pipelines under the road. The existing technology often involves interrupting the pipelines within the foundation pit area and then reconnecting the interrupted pipelines after the underground structure construction is completed. Therefore, the pipelines cannot be used normally for a long time during the construction process. Summary of the Invention

[0003] This invention discloses a method for constructing underground structures under roads that utilizes temporary utility tunnels to protect pipelines. During the construction of underground structures under roads, a utility tunnel is excavated on one side of the road to temporarily house pipelines within the excavation pit area. The pipelines only need to be briefly cut off during relocation and can be reconnected and used normally after being moved to the utility tunnel, thus reducing the impact of excavation and underground structure construction on pipelines.

[0004] This invention discloses a method for constructing underground structures beneath roads that utilize temporary utility tunnels to protect pipelines, comprising the following steps: S1. Divide the pipeline corridor area on one side of the road; and carry out earthwork excavation in the pipeline corridor area to form a pipeline corridor space that can accommodate pipelines. The bottom elevation of the pipeline corridor space shall not be lower than the top elevation of the new underground structure to be constructed. S2. Excavate the foundation pit, and during the excavation process, relocate the pipelines corresponding to the foundation pit to the pipe gallery space and connect them for use; S3. After the foundation pit is excavated, the construction of the new underground structure will be carried out in the foundation pit. S4. After the construction of the new underground structure is completed, the earthwork above the new underground structure is backfilled. During the backfilling process, the pipeline is moved from the pipe gallery space to the earthwork above the new underground structure and then connected to the pipeline. S5. After all pipelines within the utility tunnel have been relocated, the utility tunnel space is backfilled, and the road is reconstructed. A further improvement of the present invention is that, after the utility tunnel area is defined and before earthwork excavation is carried out in the utility tunnel area, the utility tunnel pile foundation retaining structure is constructed within the utility tunnel area.

[0005] A further improvement of the present invention is that, during the construction of the pipe gallery pile foundation retaining wall, additional steel sheet piles are constructed on both sides of the pipe gallery area.

[0006] A further improvement of the present invention is that, when excavating the pipe gallery space, the pipe gallery space is excavated by slope excavation.

[0007] A further improvement of the present invention is that, after the excavation of the utility tunnel space is completed and before the excavation of the foundation pit, the utility tunnel is constructed in the utility tunnel space; when the foundation pit is excavated, the pipeline corresponding to the foundation pit is moved to the utility tunnel; after the pipeline is moved out of the utility tunnel, the utility tunnel is dismantled and the utility tunnel space is backfilled.

[0008] A further improvement of the present invention is that, during the construction of the utility tunnel, the elevation of the top slab of the utility tunnel is ensured to be consistent with the design elevation of the top of the trestle of the foundation pit; and during the excavation of the foundation pit, the trestle is connected to the top slab of the utility tunnel to ensure that the top slab of the utility tunnel can be used by engineering vehicles during subsequent excavation of the foundation pit.

[0009] A further improvement of the present invention is that, after the construction of the pipe gallery is completed, the gap between the pipe gallery and the inner wall of the pipe gallery space is backfilled.

[0010] A further improvement of the present invention is that, when the pipeline is an electrified pipeline, the pipeline is moved to the indicated pipe gallery space by manual handling.

[0011] A further improvement of the present invention is that, when the pipeline is a segmented water pipe, the water pipe is first segmented, and then transported section by section to the pipe gallery using a combination of manual and mechanical methods, and then connected after being placed in the pipe gallery space.

[0012] This invention discloses a method for constructing underground structures under roads that utilizes temporary utility tunnels to protect pipelines. During the construction of underground structures under roads, a temporary utility tunnel is constructed on one side of the road to temporarily house pipelines within the excavation pit area. The pipelines only need to be briefly cut during relocation and can be reconnected and used normally after being moved to the utility tunnel, thus reducing the impact of excavation and underground structure construction on pipelines. Attached Figure Description

[0013] Figure 1 This is a schematic diagram before excavation for the present invention; Figure 2 This is a schematic diagram of the excavation of the pipe gallery space according to the present invention; Figure 3 This is a schematic diagram of the construction of the pipe gallery according to the present invention; Figure 4 This is a schematic diagram of the structure after the foundation pit is excavated according to the present invention; Figure 5 This is a schematic diagram of the underground structure after construction of the present invention; Figure 6 This is a schematic diagram showing the completion of the pipe gallery demolition and road construction according to the present invention.

[0014] 1. Roads; 2. Pipelines; 31. Existing underground structures; 32. New underground structures; 4. Utility tunnel space; 5. Diaphragm walls; 6. Utility tunnel pile foundation protection; 7. Utility tunnel columns; 8. Sheet piles; 9. Foundation pit columns; 10. Trestle bridge; 11. Utility tunnel; 12. Utility tunnel area. Detailed Implementation

[0015] like Figures 1-6 As shown, a method for constructing underground structures beneath roads using temporary utility tunnels to protect pipelines includes the following steps: S1. Divide the pipe gallery area 12 on one side of the road 1; and carry out earthwork excavation in the pipe gallery area 12 to form a pipe gallery space 4 that can accommodate the pipeline 2. The bottom elevation of the pipe gallery space 4 shall not be lower than the top elevation of the newly built underground structure 32 to be constructed. S2. Excavate the foundation pit. During the excavation process, relocate the pipeline 2 under the road 1 to the pipe gallery space 4 and connect it for use. S3. After the foundation pit is excavated, the construction of the new underground structure 32 will be carried out in the foundation pit; S4. After the construction of the new underground structure 32 is completed, the soil above the new underground structure 32 is backfilled. During the backfilling process, the pipeline 2 is moved from the pipe gallery space 4 to the soil above the new underground structure 32, and then the pipeline is connected. After all pipelines 2 in the utility tunnel space 4 are relocated, the utility tunnel space 4 is backfilled and the road 1 is reconstructed.

[0016] like Figure 1 As shown, after dividing the utility tunnel area 12 and before excavating the utility tunnel area 12, the utility tunnel pile foundation retaining 6 is constructed in the utility tunnel area 12. The construction of the pile foundation retaining 6 can increase the stability of the utility tunnel space. In this embodiment, the utility tunnel pile foundation retaining 6 adopts cast-in-place piles.

[0017] Preferably, in this embodiment, the excavation depth of the utility tunnel space 4 is 3.6m.

[0018] like Figures 3-6 As shown, after the excavation of the utility tunnel space 4 is completed and before the excavation of the foundation pit, the utility tunnel 11 is constructed in the utility tunnel space 4; when the foundation pit is excavated, the pipeline 2 corresponding to the foundation pit is moved to the utility tunnel 11; after the pipeline 2 is moved out of the utility tunnel 11, the utility tunnel 11 is dismantled and the utility tunnel space 4 is backfilled.

[0019] Better, such as Figure 2 As shown, after excavating the pipe gallery space 4, pipe gallery columns 7 are also inserted into the soil below the pipe gallery space 4 to support the pipe gallery 11 that will be installed later.

[0020] Better, such as Figures 1-6As shown, in this embodiment, there is an existing underground structure 31 on each side of the road 1. The newly built underground structure 32 under the road 1 needs to connect the existing underground structure 31. A diaphragm wall 5 is constructed on the side of the existing underground structure 31 closest to the road 1. In this embodiment, one side of the pipe gallery space 4 is connected to the diaphragm wall 3, and one side of the pipe gallery 11 is close to the diaphragm wall 5. The existing diaphragm wall 5 provides support for the pipe gallery 11.

[0021] like Figures 1-2 As shown, when constructing the pipe gallery pile foundation retaining 6, additional steel sheet piles 8 are constructed on both sides of the pipe gallery area 12. The steel sheet piles 8 are used to resist the pressure of the lateral soil. In this embodiment, since one side is supported by the diaphragm wall 5, it is only necessary to construct the steel sheet piles 8 on the side closer to the road 1. The steel sheet piles 8 can resist the soil pressure outside the pipe gallery area 12.

[0022] like Figure 2 As shown, when excavating the utility tunnel space 4, the utility tunnel space 4 adopts sloping excavation. In this embodiment, since one side of the utility tunnel space 4 is supported by the diaphragm wall 5, it is only necessary to carry out sloping excavation on the side close to the road 1. By adopting sloping excavation, the pressure of the outer soil can be dispersed, reducing the risk of collapse of the utility tunnel space 4.

[0023] like Figure 4 As shown, foundation pit columns 9 are installed inside the foundation pit to support the foundation pit structure.

[0024] like Figure 4 As shown, during the construction of the utility tunnel 11, the elevation of the top slab of the utility tunnel 11 is ensured to be consistent with the design elevation of the top of the trestle bridge 10 in the foundation pit; during the excavation of the foundation pit, the trestle bridge 10 is connected to the top slab of the utility tunnel 11 to ensure that the top slab of the utility tunnel 11 can be used by engineering vehicles during the subsequent excavation of the foundation pit.

[0025] Preferably, after the construction of the utility tunnel 11 is completed, the gap between the utility tunnel 11 and the inner wall of the utility tunnel space 4 is backfilled.

[0026] Preferably, in one embodiment, when pipeline 2 is an electrified pipeline, pipeline 2 is moved to the pipe gallery by manual handling.

[0027] Preferably, in another embodiment, when pipeline 2 is a segmented water pipe, the water pipe is first segmented, and then transported to the pipe gallery 11 section by section using a combination of manual and mechanical methods, and then connected after being placed in the pipe gallery 11.

[0028] The present invention has the following beneficial effects: 1. By constructing a temporary utility tunnel 11 on one side of Road 1, the pipeline 2 under Road 1 can be temporarily placed. The pipeline 2 only needs to be cut off for a short time during relocation and can be reconnected and used normally after being moved to the utility tunnel 11, which reduces the impact of underground structure construction on the pipeline. 2. Setting up the pipe gallery 11 can centrally protect the pipeline 2, while saving space on site; 3. The combination of utility tunnel 11 and trestle bridge 10 allows the area above utility tunnel 11 to be used as a roadway during construction, which improves the utilization rate of utility tunnel 11, optimizes construction deployment, and saves construction costs.

[0029] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for constructing underground structures beneath roads using temporary utility tunnels to protect pipelines, characterized in that, Includes the following steps: S1. Divide the pipeline corridor area on one side of the road; and carry out earthwork excavation in the pipeline corridor area to form a pipeline corridor space that can accommodate pipelines. The bottom elevation of the pipeline corridor space shall not be lower than the top elevation of the new underground structure to be constructed. S2. Excavate the foundation pit, and during the excavation process, relocate the pipelines corresponding to the foundation pit to the pipe gallery space and connect them for use; S3. After the foundation pit is excavated, the construction of the new underground structure will be carried out in the foundation pit. S4. After the construction of the new underground structure is completed, the earthwork above the new underground structure is backfilled. During the backfilling process, the pipeline is moved from the pipe gallery space to the earthwork above the new underground structure and then connected to the pipeline. S5. After all pipelines in the space within the utility tunnel have been relocated, the space within the utility tunnel is backfilled, and the road is reconstructed.

2. The construction method for underground structures beneath roads using temporary utility tunnels to protect pipelines as described in claim 1, characterized in that... After the utility tunnel area is demarcated and before earthwork excavation is carried out in the utility tunnel area, the utility tunnel pile foundation retaining structure is constructed first in the utility tunnel area.

3. The construction method for underground structures beneath roads using temporary utility tunnels to protect pipelines as described in claim 2, characterized in that... During the construction of the pipe gallery pile foundation retaining wall, additional steel sheet piles are constructed on both sides of the pipe gallery area.

4. The construction method for underground structures beneath roads using temporary utility tunnels to protect pipelines as described in claim 1, characterized in that... When excavating the utility tunnel space, the utility tunnel space is excavated by slope excavation.

5. The construction method for underground structures beneath roads using temporary utility tunnels to protect pipelines as described in claim 1, characterized in that... After the excavation of the utility tunnel space is completed and before the excavation of the foundation pit, the utility tunnel is constructed in the utility tunnel space; when the foundation pit is excavated, the pipelines corresponding to the foundation pit are moved to the utility tunnel; after the pipelines are moved out of the utility tunnel, the utility tunnel is dismantled and the utility tunnel space is backfilled.

6. The construction method for underground structures beneath roads using temporary utility tunnels to protect pipelines as described in claim 5, characterized in that... During the construction of the utility tunnel, ensure that the elevation of the top slab of the utility tunnel is consistent with the design elevation of the top of the trestle of the foundation pit; during the excavation of the foundation pit, connect the trestle to the top slab of the utility tunnel to ensure that the top slab of the utility tunnel can be used by engineering vehicles during subsequent excavation of the foundation pit.

7. The construction method for underground structures beneath roads using temporary utility tunnels to protect pipelines as described in claim 5, characterized in that... After the construction of the utility tunnel is completed, the gap between the utility tunnel and the inner wall of the utility tunnel space is backfilled.

8. The construction method for underground structures beneath roads using temporary utility tunnels to protect pipelines as described in claim 1, characterized in that... When the pipeline is an electrified pipeline, it is moved to the indicated utility tunnel space by manual handling.

9. The construction method for underground structures beneath roads using temporary utility tunnels to protect pipelines as described in claim 1, characterized in that... When the pipeline is a segmented water pipe, the water pipe is first segmented, and then the segments are transported to the pipe gallery one by one using a combination of manual and mechanical methods. After being placed in the pipe gallery space, the pipe is then connected.

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