Construction method for common foundation trench of complex rain and sewage pipelines

Abstract

The invention discloses a construction method of a complex rain and sewage pipeline shared foundation trench, which comprises the following steps that a trench is excavated along a pipeline laying route in a sloping manner, and the bottom elevation of the trench is positioned at the top elevation of a rainwater pipeline; two rows of supporting piles which are oppositely arranged are driven on one side of the bottom of the groove, and each row of supporting piles are arranged in the length direction of the pipeline laying route; mounting an inner support between the two rows of support piles, and excavating between the two rows of support piles to form a foundation trench; laying a first cushion layer at the bottom of the foundation trench; a sewage pipeline is laid on the first cushion layer, and soil is backfilled in the foundation trench; the supporting piles are dismantled, and the other side of the bottom of the groove continues to be deeply excavated downwards till the bottom elevation of the rainwater pipeline is reached; laying a second cushion layer at the bottom of the deeply excavated groove; and a rainwater pipeline is laid on the second cushion layer, and soil is backfilled in the groove. The problems that in municipal drainage lifting and transformation projects, an original method is high in construction cost, excavation is conducted many times, and the construction progress is slow are solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a construction method for a common foundation trench of complex rainwater and sewage pipes. Background Art

[0002] In the municipal drainage improvement and reconstruction project, when constructing rainwater pipes, sewage pipes, oil pipes and gas pipes on the basis of the original municipal roads, the original practice is to construct rainwater pipes and sewage pipes one after another and carry out pipe trench excavation. Due to poor geological conditions and limited urban underground space, the original practice has the problems of high construction cost, multiple excavations and slow construction progress. Summary of the invention

[0003] In order to overcome the defects of the prior art, a construction method for a complex rainwater and sewage pipe shared foundation trench is provided to solve the problems of high construction cost, multiple excavations and slow construction progress in the original practice in municipal drainage improvement and renovation projects.

[0004] In order to achieve the above object, a construction method for a common foundation trench of complex rainwater and sewage pipes is provided, comprising the following steps:

[0005] A trench is excavated along the pipeline laying route with a slope, wherein the bottom elevation of the trench is at the top elevation of the rainwater pipeline;

[0006] Two rows of supporting piles are arranged opposite to each other on one side of the bottom of the trench, and each row of supporting piles is arranged along the length direction of the pipeline laying route;

[0007] Installing inner supports between the two rows of support piles and excavating a foundation trench between the two rows of support piles;

[0008] Laying a first cushion layer at the bottom of the foundation trench;

[0009] Laying a sewage pipe on the first cushion layer and backfilling the foundation trench with soil;

[0010] Remove the support piles and continue digging down to the bottom elevation of the rainwater pipe on the other side of the bottom of the trench;

[0011] Lay the second cushion layer at the bottom of the deep excavated trench;

[0012] The rainwater pipe is laid on the second cushion layer, and soil is backfilled in the trench.

[0013] Furthermore, the supporting piles are Larsen steel sheet piles.

[0014] Furthermore, the supporting piles are equipped with surrounding purlins, and the inner supports are supported on the surrounding purlins of the two rows of supporting piles.

[0015] Furthermore, when removing the supporting piles, the supporting piles are removed in sections and the trench is dug downward in sections.

[0016] Furthermore, when laying the rainwater pipe and the sewage pipe, the pipes are wrapped with concrete and then backfilled with soil.

[0017] The beneficial effects of the present invention are that the construction method of the common foundation trench for complex rainwater and sewage pipes of the present invention realizes the construction method of laying sewage and rainwater pipes in the same trench at the same time by constructing a common foundation trench, rationally designing and planning the design dimensions and spacing of the foundation trench. The construction method of the common foundation trench for complex rainwater and sewage pipes of the present invention improves the utilization rate of underground space and reduces the costs of steel sheet pile support, earthwork excavation, etc. The construction method of the common foundation trench for complex rainwater and sewage pipes of the present invention adopts a support structure to effectively reduce the safety risks such as foundation trench collapse and landslide, and ensures the safety of construction personnel and the surrounding environment. The construction method of the common foundation trench for complex rainwater and sewage pipes of the present invention reduces repeated construction processes, such as multiple excavations and supports, and the construction progress is accelerated, thereby reducing labor costs and equipment rental costs. The construction method of the common foundation trench for complex rainwater and sewage pipes of the present invention reduces the impact on adjacent pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figures 1 to 3 It is a schematic diagram of the steps of the construction method of the complex rainwater and sewage pipe common foundation trench according to an embodiment of the present invention.

[0020] Figure 4 It is a cross-sectional view of a common base trench for complex rainwater and sewage pipes according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Reference Figures 1 to 4 As shown, the present invention provides a construction method for a complex rainwater and sewage pipe common foundation trench, comprising the following steps:

[0024] S1. A trench 1 is excavated along the pipeline laying route with a slope, and the bottom elevation of the trench 1 is at the top elevation of the rainwater pipe 2.

[0025] S2. Two rows of supporting piles 3 are arranged opposite to each other on one side of the bottom of the trench 1, and each row of supporting piles 3 is arranged along the length direction of the pipeline laying route.

[0026] As a preferred embodiment, the support piles 3 are Larsen steel sheet piles.

[0027] S3. Install inner supports 4 between two rows of supporting piles 3 and excavate between the two rows of supporting piles 3 to form a foundation trench.

[0028] As a preferred embodiment, the support piles 3 are equipped with surrounding purlins. The inner supports 4 are supported on the surrounding purlins of the two rows of support piles 3.

[0029] S4. Lay the first cushion layer at the bottom of the foundation pit.

[0030] S5. Lay the sewage pipe 5 on the first cushion layer and backfill the foundation trench with soil.

[0031] As a preferred implementation, when laying the sewage pipe 5, the pipe is wrapped with concrete and then backfilled with soil.

[0032] S6. Remove the supporting piles 3 and continue digging downward to the bottom elevation of the rainwater pipe 2 on the other side of the bottom of the trench 1.

[0033] As a preferred implementation, when removing the supporting piles 3, the supporting piles 3 are removed in sections and the trench 1 is dug downward in sections.

[0034] S7, laying a second cushion layer at the bottom of the deep excavated trench 1.

[0035] S8. Lay the rainwater pipe 2 on the second cushion layer and backfill the trench 1 with soil.

[0036] As a preferred implementation, when laying the rainwater pipe 2 and the sewage pipe 5, the pipes are wrapped with concrete and then backfilled with soil.

[0037] The construction method of the complex rainwater and sewage pipes shared foundation trench of the present invention is suitable for areas with limited underground space in cities and diverse rainwater and sewage discharge requirements. The construction method of the complex rainwater and sewage pipes shared foundation trench of the present invention realizes efficient sharing of rainwater and sewage pipes through innovative design and construction process, improves the performance and stability of the drainage system, and reduces construction costs and the impact on the surrounding environment.

[0038] The construction method of the complex rainwater and sewage pipe common foundation trench of the present invention adopts the form of excavating a pipeline foundation trench and common steel sheet pile support to solve the pipe trench common technology.

[0039] The construction method of the complex rainwater and sewage pipe common foundation trench of the present invention realizes a construction method of laying sewage and rainwater pipes simultaneously in the same trench by constructing the common foundation trench and rationally designing and planning the design size and spacing of the foundation trench.

[0040] The trench excavation of the construction method of the complex rainwater and sewage pipe common foundation trench of the present invention adopts mechanical excavation and manual assistance to ensure that the size and slope of the trench meet the design requirements. First, the sewage pipe with a deeper pipeline is excavated and steel sheet pile support is performed, and a concrete cushion layer is laid to improve the stability of the pipeline. The reinforced concrete sewage pipe is buried, the pipe is wrapped with concrete, and the soil is backfilled.

[0041] The construction method of the complex rainwater and sewage pipe common foundation trench of the present invention is to lay the slope according to the designed slope ratio when excavating the shallow rainwater pipe, lay the concrete cushion layer, bury the reinforced concrete sewage pipe, wrap the pipe with concrete, and backfill the soil.

[0042] The construction method of the complex rainwater and sewage pipe common foundation trench of the present invention removes the supporting steel and the supporting steel sheet piles supported by the steel sheet piles through segmented construction.

[0043] After the pipeline is accepted, the ground is restored to its original state by layered backfilling and compaction.

[0044] The construction method of the common foundation trench for complex rainwater and sewage pipes of the present invention improves the utilization rate of underground space and reduces the costs of steel sheet pile support, earthwork excavation, etc.

[0045] The construction method of the complex rainwater and sewage pipe common foundation trench of the present invention adopts a steel sheet pile support structure and construction technology, which effectively reduces the safety risks such as foundation trench collapse and landslide, and ensures the safety of construction personnel and the surrounding environment.

[0046] The construction method of the complex rainwater and sewage pipe common foundation trench of the present invention reduces repeated construction processes, such as multiple excavations and supports, and the construction progress is accelerated, thereby reducing labor costs and equipment rental costs.

[0047] The construction method of the complex rainwater and sewage pipes shared foundation trench of the present invention reduces the impact on adjacent pipes.

[0048] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A construction method for a common foundation trench for complex rainwater and sewage pipes, characterized in that: The following steps are involved: A trench is excavated along the pipeline laying route with a slope, wherein the bottom elevation of the trench is at the top elevation of the rainwater pipeline; Two rows of supporting piles are arranged opposite to each other on one side of the bottom of the trench, and each row of supporting piles is arranged along the length direction of the pipeline laying route; Installing inner supports between the two rows of support piles and excavating a foundation trench between the two rows of support piles; Laying a first cushion layer at the bottom of the foundation trench; Laying a sewage pipe on the first cushion layer and backfilling the foundation trench with soil; Remove the support piles and continue digging down to the bottom elevation of the rainwater pipe on the other side of the bottom of the trench; Lay the second cushion layer at the bottom of the deep excavated trench; The rainwater pipe is laid on the second cushion layer, and soil is backfilled in the trench.

2. The construction method of the common foundation trench for complex rainwater and sewage pipes according to claim 1 is characterized in that: The supporting piles are Larsen steel sheet piles.

3. The construction method of the common foundation trench for complex rainwater and sewage pipes according to claim 2 is characterized in that: The supporting piles are equipped with surrounding purlins, and the inner supports are supported on the surrounding purlins of the two rows of supporting piles.

4. The construction method of the common foundation trench for complex rainwater and sewage pipes according to claim 1 is characterized in that: When removing the retaining piles, the retaining piles are removed in sections and the trench is dug downward in sections.

5. The construction method of the common foundation trench for complex rainwater and sewage pipes according to claim 1 is characterized in that: When laying the rainwater pipe and the sewage pipe, the pipes are wrapped with concrete and then backfilled with soil.

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