A new construction integrated ground technology

Abstract

The application belongs to the technical field of building engineering construction, and particularly relates to a new building construction integrated ground technology, which comprises the following steps: step one, prefabricating a surface layer prefabricated block; step two, prefabricating a base layer prefabricated block; step three, prefabricating a ground prefabricated block; step four, prefabricating a conical pile and a decorative cover; step five, on-site construction and assembly of the ground; step six, grouting; and step seven, covering the decorative cover. In the new integrated ground technology, the constituent parts of the ground can be prefabricated in a factory, and then installed on site. Even if the ground sinks in the later period, the problem can be solved by directly supplementing grout, which is simple, fast and convenient for subsequent maintenance.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and in particular relates to a new integrated ground construction process. Background Technology

[0002] With the rapid development of modern architecture, more and more large-scale buildings are being constructed. Large-scale buildings are characterized by their large footprint and wide spatial range. Therefore, construction quality is particularly important during the construction of large-scale buildings.

[0003] Traditional ground construction procedures are complicated, the construction period is long, the construction quality is poor, it is prone to settlement, and it cannot be repaired later, requiring it to be dug up and re-laid. Therefore, there is an urgent need in the construction industry for a ground construction method that can achieve simplicity, speed and convenient subsequent maintenance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a novel integrated construction process for ground surfaces.

[0005] A new integrated construction and ground surface technology includes the following steps:

[0006] Step 1: Precast surface layer blocks;

[0007] Step 2: Precast base layer precast blocks;

[0008] Step 3: Precast ground blocks;

[0009] Step 4: Prefabricate conical piles and decorative caps

[0010] Step 5: On-site construction and assembly of the ground;

[0011] Step Six: Grouting;

[0012] Step 7: Add the decorative cover.

[0013] Step two involves prefabricating the base precast blocks according to the design requirements. The base precast blocks consist of, from bottom to top, fine stone concrete, vacuum aluminized polyester film, non-combustible EPS board, polyurethane coating moisture-proof layer, 1:3 cement mortar leveling layer, one layer of neat cement slurry, and C15 concrete cushion layer. The specific thickness of each layer is determined according to the design requirements.

[0014] The size of the base layer precast block is the same as the size of the surface layer precast block.

[0015] Step three specifically involves bonding the precast base layer blocks and surface layer blocks together with cement mortar.

[0016] In step four, the conical pile is a hollow pile body with a conical bottom and a wall thickness, with a quadrilateral cross-section and a conical insertion end; a circular through hole is opened on the side of the conical pile body to serve as a channel for the grout to flow out; the decorative cover is placed on the top of the conical pile and fits with the inner surface of the conical pile.

[0017] Step five specifically involves first excavating or backfilling the ground soil layer to be constructed to the design ground elevation minus the thickness of the precast ground block; then driving the conical pile into the original stratum to ensure that the top elevation of the conical pile is the design ground elevation; subsequently, inserting the precast ground block into the L-shaped clip on the conical pile, at which point the upper surface of the precast ground block is flush with the top of the conical pile.

[0018] In step seven, grout is injected into the conical pile. The grout diffuses from the circular through-hole of the conical pile into the original stratum, thereby reinforcing the original coating.

[0019] The grouting material used is a suspension with cement as the main agent or a two-component mixture of cement and water glass; the grout for seepage prevention and plugging is water glass, a mixture of water glass and cement, or a chemical grout, and chemical grouts that pollute the environment are not used; for the reinforcement of foundation soil layers with groundwater flow, single-component cement grout cannot be used, and two-component polymer grout or a quick-setting grout with a short initial setting time should be used.

[0020] Grouting calculations are as follows:

[0021] Q = s*(Lh) + (1 / 3)s*h + πR 2 Lηαβ

[0022] in:

[0023] Q is the amount of grout that needs to be injected for each cone pile, and L is the amount of grout that needs to be injected.

[0024] s is the cross-sectional area of ​​the tapered pile, dm 2 ;

[0025] h is the length of the cone segment of the cone pile, dm;

[0026] L is the total length of the tapered pile, in dm;

[0027] R is the slurry diffusion radius, dm;

[0028] η is the formation porosity, which is 3% to 5% for Class IV and V surrounding rocks, 2% to 3% for Class III surrounding rocks, 1% to 2% for soft rocks, and 12% for sedimentary bodies;

[0029] α represents the effective filling rate of the slurry, which is taken as 0.9;

[0030] β is the slurry loss coefficient, which is taken as 1.15.

[0031] Grouting pressure: 0.2MPa~0.5MPa in sandy soil and 0.2MPa~0.3MPa in cohesive soil; for compaction grouting, the slump of cement mortar should be 25mm~75mm and the grouting pressure should be 1.0MPa~7.0MPa; when using cement-water glass double-liquid fast-setting grout, the grouting pressure should not exceed 1MPa.

[0032] The beneficial effects of this invention are: This invention overcomes the defects of traditional ground construction, such as complicated procedures, long construction period, poor quality assurance, easy settlement, and inability to repair later. The integrated ground new process provided by this invention allows the components of the ground to be prefabricated in the factory and installed on site. Even if the ground settles later, it can be solved by directly filling the grout. It is simple, fast and convenient for subsequent maintenance. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the prefabricated ground blocks in the integrated ground system of the present invention;

[0034] Figure 2 This is a schematic diagram of the conical pile in the integrated ground of the present invention;

[0035] Figure 3 This is a schematic diagram of the integrated ground construction process of the present invention;

[0036] in,

[0037] 1-Base layer precast block, 2-Surface layer precast block, 3-Ground precast block, 4-Conical pile, 5-L-shaped claw, 6-Circular through hole. Detailed Implementation

[0038] To better explain and facilitate understanding of the present invention, the technical solution and effects of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] A new integrated construction and ground surface technology includes the following steps:

[0040] Step 1: Precast surface layer blocks;

[0041] Precast surface layer blocks are made according to the design requirements. In this embodiment, the surface layer of the integrated floor is 800×800 floor tiles, that is, the surface layer precast blocks in this embodiment are 800×800 floor tiles.

[0042] Step 2: Precast base layer precast blocks;

[0043] The base layer precast blocks are precast according to the design requirements. From bottom to top, the base layer precast blocks include fine aggregate concrete (with wire mesh on the top and bottom, and a heat dissipation pipe in the middle), vacuum-aluminized polyester film, non-combustible EPS board, polyurethane coating moisture-proof layer, 1:3 cement mortar leveling layer, one layer of neat cement slurry, and a C15 concrete cushion layer. The specific thickness of each layer is determined according to the design requirements. The fine aggregate concrete is reinforced with wire mesh on top and steel mesh on the bottom. In this embodiment, the surface layer precast blocks include 50mm thick fine aggregate concrete, 0.2mm thick vacuum-aluminized polyester film, 20mm thick non-combustible EPS board, 1.5mm thick polyurethane coating moisture-proof layer, 20mm thick 1:3 cement mortar leveling layer, one layer of neat cement slurry, and a 60mm thick C15 concrete cushion layer.

[0044] The size of the base layer precast blocks is the same as the size of the surface layer precast blocks.

[0045] Step 3: Precast ground blocks;

[0046] The precast base layer blocks and surface layer blocks are bonded together with cement mortar, such as... Figure 1 As shown.

[0047] Step 4: Prefabricate the conical piles and decorative caps;

[0048] like Figure 2 As shown, the conical pile is a hollow pile with a conical bottom and thick walls, a quadrilateral cross-section, and a conical insertion end. A circular through-hole is provided on the side of the conical pile to serve as a channel for grout flow.

[0049] The decorative cover is placed on top of the conical pile and fits into the inner surface of the conical pile.

[0050] Step 5: On-site construction and assembly of the ground;

[0051] First, excavate or backfill the soil layer to be constructed to the design ground elevation minus the thickness of the precast ground blocks; then, drive conical piles into the existing soil layer, ensuring that the top elevation of the conical piles is at the design ground elevation; subsequently, insert the precast ground blocks into the L-shaped clips on the conical piles, such as... Figure 3 As shown, at this time, the upper surface of the precast block on the ground is flush with the top of the cone pile.

[0052] Step Six: Grouting;

[0053] Grout is injected into the conical pile, and the grout diffuses from the circular through-hole of the conical pile into the original stratum, thereby reinforcing the original stratum.

[0054] The grout material should be a cement-based suspension or a two-component mixture of cement and water glass. For seepage prevention and plugging grouting, water glass, a mixture of water glass and cement, or a chemical grout should be used; environmentally polluting chemical grouts should not be used. For reinforcing foundation soil layers with groundwater flow, single-component cement grout should not be used; instead, a two-component polymer grout or a quick-setting grout with a short initial setting time should be used.

[0055] The grouting calculation is as follows:

[0056] Q = s*(Lh) + (1 / 3)s*h + πR 2 Lηαβ

[0057] in:

[0058] Q is the amount of grout that needs to be injected for each cone pile, and L is the amount of grout that needs to be injected.

[0059] s is the cross-sectional area of ​​the tapered pile, dm 2 ;

[0060] h is the length of the cone segment of the cone pile, dm;

[0061] L is the total length of the tapered pile, in dm;

[0062] R is the slurry diffusion radius, dm;

[0063] η is the formation porosity, which is 3% to 5% for Class IV and V surrounding rocks, 2% to 3% for Class III surrounding rocks, 1% to 2% for soft rocks, and 12% for sedimentary bodies;

[0064] α represents the effective filling rate of the slurry, which is taken as 0.9;

[0065] β is the slurry loss coefficient, which is taken as 1.15.

[0066] Grouting pressure: 0.2MPa~0.5MPa in sandy soil, and 0.2MPa~0.3MPa in cohesive soil; for compaction grouting, the slump of the cement mortar should be 25mm~75mm, and the grouting pressure should be 1.0MPa~7.0MPa. When using cement-water glass dual-liquid fast-setting grout, the grouting pressure should not exceed 1MPa.

[0067] Step 7: Add the decorative cover.

[0068] After grouting is completed, a decorative cap is placed on top of the conical pile to complete the construction.

Claims

1. A novel integrated construction and ground surface technology, characterized in that, Includes the following steps: Step 1: Precast surface layer blocks; Step 2: Precast base layer precast blocks; The base precast blocks are precast according to the design requirements. The base precast blocks consist of fine stone concrete, vacuum aluminized polyester film, non-combustible EPS board, polyurethane coating moisture-proof layer, 1:3 cement mortar leveling layer, one layer of neat cement slurry, and C15 concrete cushion layer from bottom to top. The specific thickness of each layer is determined according to the design requirements. Step 3: Precast ground blocks; Specifically, the precast base layer blocks and surface layer blocks are bonded together with cement mortar; Step 4: Prefabricate the conical piles and decorative caps; The conical pile is a hollow pile body with a conical bottom and thick walls, with a quadrilateral cross-section and a conical insertion end; the side of the conical pile body has a circular through hole as a channel for the grout to flow out; the decorative cover is placed on the top of the conical pile and fits into the inner surface of the conical pile; Step 5: On-site construction and assembly of the ground; Specifically, the ground soil layer to be constructed is first excavated or backfilled to the design ground elevation minus the thickness of the precast ground block; then, cone piles are driven into the original soil layer to ensure that the top elevation of the cone piles is the design ground elevation; then, the precast ground blocks are inserted into the L-shaped clips on the cone piles, at which point the upper surface of the precast ground blocks is flush with the top of the cone piles. Step Six: Grouting; The grouting material used is a suspension with cement as the main agent or a two-component mixture of cement and water glass; the grout for seepage prevention and plugging is water glass, a mixture of water glass and cement, or a chemical grout, and chemical grouts that pollute the environment are not used; for the reinforcement of foundation soil layers with groundwater flow, single-component cement grout cannot be used, and two-component grouting or a rapid setting method with a short initial setting time should be used. Step 7: Add the decorative cover.

2. The new integrated construction and ground surface technology according to claim 1, characterized in that: The size of the base layer precast block is the same as the size of the surface layer precast block.

3. The new integrated construction and ground surface technology according to claim 1, characterized in that: In step seven, grout is injected into the conical pile. The grout diffuses from the circular through-hole of the conical pile into the original coating, thereby reinforcing the original coating.

4. The new integrated construction and ground surface technology according to claim 3, characterized in that: Grouting calculations are as follows: Q =s*(Lh)+(1 / 3)s*h +πR²Lηαβ in: Q represents the amount of grout required to be injected for each cone pile, in L; s is the cross-sectional area of ​​the tapered pile, dm 2 ; h is the length of the cone segment of the cone pile, dm; L is the total length of the tapered pile, in dm; R is the slurry diffusion radius, dm; η is the formation porosity, which is 3% to 5% for Class IV and V surrounding rocks, 2% to 3% for Class III surrounding rocks, 1% to 2% for soft rocks, and 12% for sedimentary bodies; α represents the effective filling rate of the slurry, which is taken as 0.9; β is the slurry loss coefficient, which is taken as 1.

15.

5. A novel integrated construction and ground surface technology according to claim 3, characterized in that: Grouting pressure: 0.2MPa~0.5MPa in sandy soil and 0.2MPa~0.3MPa in cohesive soil; for compaction grouting, the slump of cement mortar should be 25mm~75mm and the grouting pressure should be 1.0MPa~7.0MPa; when using cement-water glass double-liquid fast-setting grout, the grouting pressure should not exceed 1MPa.

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