Multifunctional double-row construction method pile supporting structure for waterworks and construction method of multifunctional double-row construction method pile supporting structure

Abstract

The multifunctional double-row construction method pile supporting structure comprises front-row SMW construction method piles, rear-row SMW construction method piles, top beams and connecting beams, the rear-row SMW construction method piles are arranged on the rear sides of the front-row SMW construction method piles, and the pile tops of the front-row SMW construction method piles and the pile tops of the rear-row SMW construction method piles are connected through the top beams correspondingly; the front-row SMW construction method piles and the rear-row SMW construction method piles are connected through connecting beams, and after building construction is completed and a foundation pit is backfilled, pipelines are laid between the front-row SMW construction method piles and the rear-row SMW construction method piles. According to the multifunctional double-row construction method pile supporting structure for the waterworks, the H-shaped steel in the SMW construction method piles can be repeatedly used and is environmentally friendly and economical, the water stopping effect of an enclosure structure can be effectively improved, the integrality is better, the construction efficiency is improved, and meanwhile waste concrete is reduced; and after building construction is completed, the double-row construction method piles can be reused to serve as a pipeline supporting structure, the economical efficiency is improved, and meanwhile the construction method is more convenient.

Description

Technical Field

[0001] The invention relates to the field of foundation pit support, and in particular to a multifunctional double-row construction method pile support structure for a water plant and a construction method thereof. Background Art

[0002] At present, the scale of cities is expanding rapidly. In order to meet the requirements of improving water quality, improve the quality of cities, improve the health level of citizens and increase their sense of happiness, water plants are constantly improving water production processes. At the same time, water plants are turning from traditional flat pools to cascading pool designs. While reducing the area occupied by water plants, higher requirements are also put forward for the support structure in foundation pit projects. At this stage, water plants have the characteristics of small sites, dense new units, complex production pipelines, and compact plane layout. How to provide a support structure that can ensure small deformation of the foundation pit, good water-stopping effect, high construction efficiency, and economic and environmental protection is a technical problem that needs to be solved urgently. Summary of the invention

[0003] In order to solve the technical problems existing in the prior art, the present invention provides a multifunctional double-row pile support structure for a water plant and a construction method thereof.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] A multifunctional double-row SMW method pile support structure for a water plant comprises a front row SMW method piles, a rear row SMW method piles, a crown beam and a connecting beam. The rear row SMW method piles are arranged at the rear side of the front row SMW method piles. The pile tops of the front row SMW method piles and the rear row SMW method piles are respectively connected by crown beams. The front row SMW method piles and the rear row SMW method piles are connected by a connecting beam. After the construction is completed and the foundation pit is backfilled, a pipeline is laid between the front row SMW method piles and the rear row SMW method piles.

[0006] As a preferred technical solution, the front row of SMW construction piles includes a front row of H-shaped steel, and the rear row of SMW construction piles includes a rear row of H-shaped steel.

[0007] As a preferred technical solution, the crown beam includes a front row reinforced concrete crown beam and a rear row reinforced concrete crown beam. The tops of the front row SMW construction piles are connected by the front row reinforced concrete crown beam, and the tops of the rear row SMW construction piles are connected by the rear row reinforced concrete crown beam.

[0008] As a preferred technical solution, during construction, the front row of SMW method piles are close to the free surface, and the front row of SMW method piles and the rear row of SMW method piles together serve as the foundation pit support structure. After the construction is completed and the foundation pit is backfilled, pipes are laid between the front row of SMW method piles and the rear row of SMW method piles as a pipeline foundation pit support structure.

[0009] As a preferred technical solution, a construction method for a multifunctional double-row pile support structure for a water plant includes the following steps:

[0010] Step 1: According to the geological conditions of the site and the analysis of the foundation pit support structure, determine the pile spacing, row spacing, pile length, pile section parameters, pile top elevation and H-beam insertion depth, cap beam and connecting beam concrete strength and reinforcement of the front and rear rows of SMW piles;

[0011] Step 2: Level the site, construct SMW piles first, and then reinforce the pit;

[0012] Step 3: Dewatering the construction pit;

[0013] Step 4: construct the crown beam and connecting beam;

[0014] Step 5: After the retaining structure, crown beam and connecting beam meet the specified age and strength requirements, excavate to the bottom of the building foundation pit and pour the cushion layer, structural bottom plate and plain concrete force transfer belt in time;

[0015] Step 6: After the building structure is completed, backfill the soil to the designed ground elevation;

[0016] Step seven: construct pipelines between the double rows of SMW piles.

[0017] As a preferred technical solution, in step three, the foundation pit is dewatered to ensure that the water level drops to 1.0m below the excavation surface.

[0018] As a preferred technical solution, in step seven, constructing the pipeline includes chiseling out the connecting beams within the pipeline laying range before construction, excavating to the bottom of the pipe, laying a sand cushion layer, and supporting the pipeline.

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

[0020] The multifunctional double-row construction method pile support structure for the water plant of the present invention adopts three-axis mixing piles with H-shaped steel inserted therein, and the H-shaped steel is reusable and has the characteristics of green economy; the double-row construction method piles can effectively improve the water-stopping effect of the enclosure structure compared with the single-row construction method piles; the double-row construction method piles are connected by crown beams and connecting beams, and have better integrity. It is not necessary to set up braces in the foundation pit, which makes the construction method more convenient, improves the construction efficiency, and reduces the generation of waste concrete; after the construction of the building is completed, the double-row construction method piles can be reused as a pipeline support structure, and the pipeline foundation pit does not need to construct a separate support structure, which improves the economy while also improving the convenience of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a multifunctional double-row construction method pile support structure used in a water plant according to the present invention;

[0022] Figure 2 This is a cross-sectional view in the direction of A of the multifunctional double-row construction method pile support structure for a water plant of the present invention;

[0023] Figure 3 It is a cross-sectional view in the direction of B of the multifunctional double-row construction method pile support structure for a water plant of the present invention.

[0024] In the figure: 1. Front row SMW construction piles; 2. Rear row SMW construction piles; 3. Front row H-shaped steel; 4. Rear row H-shaped steel; 5. Front row reinforced concrete crown beam; 6. Rear row reinforced concrete crown beam; 7. Connecting beam; 8. Pipeline; 9. Pipeline cushion; 10. Building. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below in conjunction with specific implementation methods:

[0026] like Figure 1 As shown, a multifunctional double-row construction method pile support structure for a water plant includes a front row SMW construction method pile 1, a rear row SMW construction method pile 2, a crown beam and a connecting beam 7. The rear row SMW construction method pile 2 is arranged at the rear side of the front row SMW construction method pile 1, and the crown beam includes a front row reinforced concrete crown beam 5 and a rear row reinforced concrete crown beam 6. The tops of the front row SMW construction method piles 1 are connected by the front row reinforced concrete crown beam 5, and the tops of the rear row SMW construction method piles 2 are connected by the rear row reinforced concrete crown beam 6. The front row SMW construction method piles 1 and the rear row SMW construction method piles 2 are connected by a connecting beam 7. The double-row construction method piles are connected by the crown beam and the connecting beam 7, and the integrity is better. There is no need to set a brace for the foundation pit, which brings convenience to the construction, improves the construction efficiency, and can reduce the generation of waste concrete.

[0027] The SMW method uses a multi-axis drilling and mixing machine to drill to a certain depth on site, and at the same time sprays cement-based strengthening agents at the drill bit to repeatedly mix and mix with the foundation soil. The overlapping construction is adopted between the construction units, and then H-shaped steel or steel plates are inserted as stress reinforcement materials before the cement-soil mixture hardens. When the cement hardens, a continuous, complete, and seamless underground wall with certain strength and rigidity is formed. In this embodiment, H-shaped steel is inserted into the three-axis mixing pile, which can be reused and has green and economic characteristics.

[0028] like Figure 2 As shown, the front row of SMW construction piles 1 includes a front row of H-shaped steels 3 , and the rear row of SMW construction piles 2 includes a rear row of H-shaped steels 4 .

[0029] During construction, the front row of SMW construction piles 1 are close to the free surface, and the front row of SMW construction piles 1 and the rear row of SMW construction piles 2 serve as the foundation pit support structure. After the construction is completed and the foundation pit is backfilled, Figure 3As shown, a pipeline 8 is laid between the front row of SMW construction method piles 1 and the rear row of SMW construction method piles 2 as a foundation pit support structure for the pipeline 8. A pipeline cushion layer 9 is arranged under the pipeline 8. The foundation pit for the pipeline 8 does not need to be constructed with a separate support structure, which improves the economy and the convenience of construction.

[0030] A construction method for a multifunctional double-row pile support structure for a water plant comprises the following steps:

[0031] like Figure 1 As shown, step 1, according to the site geological conditions and foundation pit support structure calculation and analysis, determine the pile spacing, row spacing, pile length, pile body cross-sectional parameters, pile top elevation and H-beam insertion depth, cap beam and connecting beam 7 concrete strength and reinforcement of the front and rear rows of SMW construction method piles 2;

[0032] Step 2: Level the site, construct SMW piles first, and then reinforce the pit;

[0033] Step 3: Dewater the foundation pit to ensure that the water level drops to 1.0m below the excavation surface;

[0034] Step 4: construct the crown beam and the connecting beam 7;

[0035] Step 5: After the retaining structure and the crown beam and the connecting beam 7 meet the specified age and strength requirements, excavate to the bottom of the foundation pit of the building 10, and pour the cushion layer, structural bottom plate and plain concrete force transmission belt in time;

[0036] Step 6: After the structure of the building 10 is completed, backfill the soil to the designed ground elevation;

[0037] Step seven, construct the pipeline 8 between the double rows of SMW construction method piles: before construction, remove the connecting beam 7 within the laying range of the pipeline 8, excavate to the bottom of the pipe, lay a sand cushion layer, and support the pipeline 8.

[0038] This embodiment is only a further explanation of the invention rather than a limitation of the invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as they are within the scope of the claims of the invention, they are protected by the patent law.

Claims

1. A multifunctional double-row pile support structure for a water plant, characterized in that: It includes a front row of SMW method piles, a rear row of SMW method piles, a crown beam and a connecting beam. The rear row of SMW method piles is arranged on the rear side of the front row of SMW method piles. The pile tops of the front row of SMW method piles and the rear row of SMW method piles are respectively connected by crown beams. The front row of SMW method piles and the rear row of SMW method piles are connected by a connecting beam. After the construction is completed and the foundation pit is backfilled, a pipeline is laid between the front row of SMW method piles and the rear row of SMW method piles.

2. The multifunctional double-row pile support structure for a water plant according to claim 1 is characterized in that: The front row of SMW construction piles includes a front row of H-shaped steel, and the rear row of SMW construction piles includes a rear row of H-shaped steel.

3. The multifunctional double-row pile support structure for a water plant according to claim 1 is characterized in that: The crown beam comprises a front row reinforced concrete crown beam and a rear row reinforced concrete crown beam, the tops of the front row SMW construction method piles are connected by the front row reinforced concrete crown beam, and the tops of the rear row SMW construction method piles are connected by the rear row reinforced concrete crown beam.

4. The multifunctional double-row pile support structure for a water plant according to claim 1 is characterized in that: During construction, the front row of SMW construction piles are close to the free surface, and the front row of SMW construction piles and the rear row of SMW construction piles together serve as a foundation pit support structure. After the construction is completed and the foundation pit is backfilled, pipes are laid between the front row of SMW construction piles and the rear row of SMW construction piles to serve as a pipeline foundation pit support structure.

5. The construction method of the multifunctional double-row pile support structure for a water plant according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: Step 1: According to the geological conditions of the site and the analysis of the foundation pit support structure, determine the pile spacing, row spacing, pile length, pile section parameters, pile top elevation and H-beam insertion depth, cap beam and connecting beam concrete strength and reinforcement of the front and rear rows of SMW piles; Step 2: Level the site, construct SMW piles first, and then reinforce the pit; Step 3: Dewatering the construction pit; Step 4: construct the crown beam and connecting beam; Step 5: After the retaining structure, crown beam and connecting beam meet the specified age and strength requirements, excavate to the bottom of the building foundation pit and pour the cushion layer, structural bottom plate and plain concrete force transfer belt in time; Step 6: After the building structure is completed, backfill the soil to the designed ground elevation; Step seven: construct pipelines between the double rows of SMW piles.

6. The construction method of the multifunctional double-row pile support structure for a water plant according to claim 5, characterized in that: In step three, the foundation pit is dewatered to ensure that the water level drops to 1.0 m below the excavation surface.

7. According to the construction method of the multifunctional double-row pile support structure for a water plant as described in claim 5, in the step seven, constructing the pipeline includes chiseling out the connecting beams within the pipeline laying range before construction, excavating to the bottom of the pipe, laying a sand cushion layer, and supporting the pipeline.

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