Drainage construction method for preventing saltpetering of pervious concrete

Abstract

The invention relates to the technical field of concrete drainage, in particular to a drainage construction method for preventing saltpetering of pervious concrete, which comprises the following steps: S1, paving a concrete cushion layer, and performing slope making treatment when the concrete cushion layer is paved; s2, waterproof geotechnical cloth is laid, and the waterproof geotechnical cloth is laid on the concrete cushion layer; s3, filter pipes are installed, specifically, a plurality of filter pipes with drainage holes are fixedly installed on the waterproof geotechnical cloth, and the filter pipes are located at the slope bottom position; s4, a reinforcing mesh is laid, specifically, the reinforcing mesh is laid above the filter pipes; s5, permeable concrete is laid, and the permeable concrete is poured above the reinforcing mesh and vibrated compactly; and S6, a rainwater collecting well is constructed, specifically, the rainwater collecting well is constructed on one side of the structural layer, and the end of the filter pipe extends into the rainwater collecting well. According to the method, the saltpetering resistance of the pervious concrete is comprehensively improved, the later maintenance cost is reduced, inconvenience and loss caused by repairing work are reduced, and a more reliable and efficient solution is provided for urban ecological construction.

Description

Technical Field

[0001] The invention relates to the field of concrete drainage technology, in particular to a drainage construction method for preventing alkali efflorescence of permeable concrete. Background Art

[0002] With the acceleration of urbanization, problems such as urban "heat island effect", waterlogging and water shortage have become increasingly prominent. Permeable concrete, as an environmentally friendly building material, has been widely used in the construction of urban roads, squares, parking lots, etc. due to its good permeability, air permeability and ecological regulation function.

[0003] The water permeability of pervious concrete is directly affected by its porosity and pore size. Porosity refers to the percentage of pore volume in pervious concrete to the total volume, and is a key factor in ensuring water penetration. At present, the porosity can be precisely controlled by adjusting the aggregate grading, adding lightweight aggregates of specific particle size or pore formers, etc., generally controlled between 15% and 30% to balance the water permeability and structural strength. At the same time, the aperture design needs to consider the rainwater infiltration rate, impurity filtration effect and anti-clogging ability. The aperture is usually designed to range from 2mm to 10mm to meet the needs of different application scenarios.

[0004] The alkali blooming phenomenon of permeable concrete is mainly due to improper drainage measures, which causes the road surface to be soaked in water for a long time, especially in low-lying areas or semi-permeable concrete areas. The water cannot be effectively discharged for a long time, causing the incompletely hydrated components in the concrete to come into contact with water for a long time, producing alkali, salt and other compounds, thereby forming a whitening phenomenon on the concrete surface. This problem not only affects the aesthetics of the road surface, but may also damage the structural performance of the concrete and shorten its service life. Summary of the invention

[0005] In order to solve the above problems in the prior art, the present invention provides a drainage construction method for preventing alkali efflorescence in permeable concrete.

[0006] The present invention provides a drainage construction method for preventing alkali efflorescence in permeable concrete, comprising the following steps: S1. Laying the concrete cushion layer, specifically including: measuring and laying out, and performing slope treatment when laying the concrete cushion layer; S2. Laying the waterproof geotextile, specifically including: laying the waterproof geotextile on the concrete cushion; S3, installing filter pipes, specifically including: installing and fixing a plurality of filter pipes with drainage holes on the waterproof geotextile so that the filter pipes are at the bottom of the slope; S4, laying a steel mesh, specifically including: laying a steel mesh above the filter tube; S5. Laying permeable concrete, specifically including: pouring permeable concrete on top of the steel mesh and vibrating and compacting it; S6. constructing a rainwater collection well, specifically comprising: constructing a rainwater collection well on one side of the structural layer so that the end of the filter pipe extends into the rainwater collection well.

[0007] By adopting the above technical solution, rainwater passes through the permeable concrete layer and enters the filter pipe through the drainage holes, and is collected in the rainwater collection well through the filter pipe and discharged. The steel mesh is used to prevent the permeable concrete from blocking the drainage holes, while improving the overall structural strength. The waterproof geotextile effectively prevents rainwater from penetrating into the concrete cushion layer. This method comprehensively improves the anti-alkali ability of permeable concrete, can reduce the subsequent maintenance costs, reduce the inconvenience and losses caused by repair work, and provide a more reliable and efficient solution for urban ecological construction.

[0008] Optionally, in S2, a layer of waterproof geotextile is first laid on the concrete cushion layer, a PC endurance board is laid on the layer of waterproof geotextile, and another layer of waterproof geotextile is laid on the PC endurance board.

[0009] By adopting the above technical solution, two layers of waterproof geotextiles are set up to provide better anti-seepage effect. PC endurance boards are laid between the two layers of waterproof geotextiles, which not only improves the overall structural strength, but also further improves the anti-seepage effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram of the structure of the drainage system according to the embodiment of the present invention.

[0011] Figure 2 It is a flow chart of the drainage construction method according to an embodiment of the present invention.

[0012] Explanation of the accompanying drawings: 1. Concrete cushion; 2. Waterproof geotextile; 3. PC endurance board; 4. Filter tube; 40. Drain hole; 5. Steel mesh; 6. Permeable concrete; 7. Rainwater collection well. DETAILED DESCRIPTION

[0013] The following is combined with Figure 1 -Attached Figure 2 The present invention is described in further detail.

[0014] The embodiment of the present invention discloses a drainage construction method for preventing alkali efflorescence in permeable concrete. Figure 1 , a drainage construction method for preventing alkali efflorescence of permeable concrete comprises the following steps: S1. laying a concrete cushion layer 1, specifically including: measuring and laying out, and performing slope treatment when laying the concrete cushion layer 1 to ensure that rainwater flows to one side for centralized drainage.

[0015] S2, laying waterproof geotextile 2 and PC solid sheet 3, specifically including: first laying a layer of waterproof geotextile 2 on the concrete cushion layer 1, then laying PC solid sheet 3 on the waterproof geotextile 2, and then laying another layer of waterproof geotextile 2 on the PC solid sheet 3; laying waterproof geotextile 2 and PC solid sheet 3 can effectively prevent rainwater from penetrating into the concrete cushion layer 1, prevent rainwater from being lost, and at the same time improve the bearing capacity.

[0016] S3, installing the filter tube 4, specifically including: laying out the filter tube 4 on the top surface of the upper waterproof geotextile 2 according to the bottom position of the slope and anchoring it, the filter tube 4 is a stainless steel punched filter tube, and a plurality of drainage holes 40 are arranged on its surface to ensure smooth drainage and improve drainage performance.

[0017] S4, laying the steel mesh 5, specifically including: laying a layer of steel mesh 5 above the filter tube 4, the purpose of which is to prevent the permeable concrete 6 from blocking the drainage hole 40 and improve the overall structural strength.

[0018] S5, laying permeable concrete 6, specifically including: mixing, pouring and vibrating the permeable concrete 6 on the top of the steel mesh 5 according to the established mix ratio and construction process requirements, to ensure that the strength and water permeability of the permeable concrete 6 meet the standards.

[0019] S6. Constructing a rainwater collection well 7, specifically comprising: constructing a rainwater collection well 7 on one side of the structural layer according to design requirements, extending the end of the filter tube 4 into the rainwater collection well 7, collecting and centrally discharging the water that has penetrated into the structural layer, and reducing the accumulation of water inside the concrete.

[0020] The present invention uses scientific design and construction process, starting from foundation treatment, pre-embedded drainage facilities and other construction links, effectively uses drainage construction methods to prevent the occurrence of efflorescence, comprehensively improves the efflorescence resistance of permeable concrete, can reduce later maintenance costs, and reduce the inconvenience and losses caused by repair work. This construction method not only solves the technical problem of efflorescence of permeable concrete, but also provides a more reliable and efficient solution for urban ecological construction.

[0021] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A drainage construction method for preventing alkali efflorescence in permeable concrete, characterized in that: The following steps are involved: S1, laying a concrete cushion layer (1), specifically comprising: measuring and laying out, and performing slope treatment when laying the concrete cushion layer (1); S2, laying a waterproof geotextile (2), specifically comprising: laying a waterproof geotextile (2) on the concrete cushion layer (1); S3, installing the filter tube (4), specifically comprising: installing and fixing a plurality of filter tubes (4) having drainage holes (40) on the waterproof geotextile (2), so that the filter tubes (4) are located at the bottom of the slope; S4, laying a steel mesh (5), specifically comprising: laying a steel mesh (5) above the filter tube (4); S5, laying permeable concrete (6), specifically comprising: pouring the permeable concrete (6) above the steel mesh (5) and vibrating and compacting it; S6, constructing a rainwater collection well (7), specifically comprising: constructing a rainwater collection well (7) on one side of the structural layer, so that the end of the filter pipe (4) extends into the rainwater collection well (7).

2. The drainage construction method for preventing alkali efflorescence of permeable concrete (6) according to claim 1, characterized in that: In S2, a layer of waterproof geotextile (2) is first laid on the concrete cushion layer (1), a PC endurance board (3) is laid on the layer of waterproof geotextile (2), and another layer of waterproof geotextile (2) is laid on the PC endurance board (3).

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