Rapid processing structure for forming land foundation through hydraulic reclamation

Abstract

The utility model discloses a rapid processing structure for forming a land foundation through hydraulic reclamation. The rapid processing structure comprises a plurality of layers of horizontal drainage channels, a plurality of layers of vertical drainage channels, a drainage cushion layer and a pre-pressing stacking material. The multiple layers of horizontal drainage channels are arranged in a soft soil layer of the hydraulic-filled land foundation at intervals from bottom to top; each layer of horizontal drainage channel comprises a lower-layer water-permeable non-woven fabric, a sand layer laid on the lower-layer water-permeable non-woven fabric and an upper-layer water-permeable non-woven fabric laid on the sand layer; the vertical drainage channel is composed of a plurality of granular mixture piles, the granular mixture piles vertically sink into the hydraulic reclamation land foundation from the ground surface of the hydraulic reclamation land foundation, and the bottoms of the granular mixture piles are lower than the top of the hard soil layer of the hydraulic reclamation land foundation. The multiple layers of horizontal drainage channels and the multiple granular piles form a three-dimensional drainage network; the drainage cushion layer is arranged on the ground surface of the hydraulic reclamation land foundation; and the pre-pressed stacking material is arranged on the top surface of the drainage cushion layer. The device disclosed by the utility model has the characteristics of high consolidation speed and large treatment depth, and the material is green and environment-friendly.

Description

Technical Field

[0001] The utility model relates to a rapid processing structure for blowing and filling a land base. Background Art

[0002] Rapid land formation projects are generally divided into multiple land formation areas according to their different functions. For areas without large loads during the service life, filling equipment is generally used to blow the silt at the bottom of the water area to the designated area to form new land and form a deep mud receiving area. The newly filled soft soil is generally original silt, which has unfavorable engineering characteristics such as super softness and super water content, large porosity and extremely low strength. When the silt in the mud receiving area reaches a certain thickness, its treatment difficulty increases greatly. Conventional vertical drainage boards will bend during the process of silt consolidation and settlement, thereby blocking the drainage channel and failing to reach the expected treatment depth. This has become a difficulty in foundation treatment in such filling land formation areas. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a rapid processing structure for filling into a land foundation, which has the characteristics of fast consolidation speed and large processing depth, can improve the bearing capacity of the foundation, and the material is green and environmentally friendly.

[0004] The purpose of the utility model is achieved as follows: a rapid processing structure for filling a land base by blowing, comprising multiple horizontal drainage channels and vertical drainage channels, a drainage cushion layer and a pre-compressed pile load; wherein,

[0005] The multi-layer horizontal drainage channels are arranged at intervals from bottom to top in the soft soil layer formed by blowing and filling into the land foundation; each layer of the horizontal drainage channel comprises a lower layer of water-permeable non-woven fabric, a sand layer laid on the lower layer of water-permeable non-woven fabric, and an upper layer of water-permeable non-woven fabric laid on the sand layer;

[0006] The vertical drainage channel is composed of a plurality of granular piles, which are vertically sunk from the surface of the land foundation formed by blowing and filling into the land foundation formed by blowing and filling, and the bottoms of the plurality of granular piles are lower than the top of the hard soil layer formed by blowing and filling into the land foundation;

[0007] Multi-layer horizontal drainage channels and multiple granular piles form a three-dimensional drainage network;

[0008] The drainage cushion layer is arranged on the ground surface of the land foundation formed by blowing and filling;

[0009] The pre-compressed pile load is arranged on the top surface of the drainage cushion layer.

[0010] The above-mentioned rapid treatment structure of land foundation by filling, wherein the spacing between the multi-layer horizontal drainage channels is 5 to 8 meters; the thickness of the sand layer in each horizontal drainage channel is 0.1 to 0.3 meters, and the permeability coefficient of the sand layer is not less than 1*10 -2 cm / s of medium-coarse sand.

[0011] The above-mentioned rapid processing structure for blowing fill to form a land foundation, wherein the pile diameter of the granular pile is 0.5 to 1 m; the multiple granular piles are arranged in a square or regular triangle, and the arrangement spacing is 1.2 to 2.5 m; the bottom of the multiple granular piles is 2 to 4 m lower than the top of the hard soil layer blown to form a land foundation.

[0012] In the above-mentioned rapid processing structure for filling into a land base, the granular body piles are crushed stone piles, compacted sand piles, bagged granular bodies or sand and gravel mixed piles.

[0013] In the above-mentioned rapid processing structure for filling land foundation, the drainage cushion layer adopts a sand cushion layer with a thickness of 0.1 to 0.3m.

[0014] The utility model is characterized in that a three-dimensional drainage network is formed by granular piles, degradable and permeable non-woven fabrics and sand layers, and drainage and consolidation of the soft soil foundation are caused by the dredged fill under the action of preloading, which can shorten the drainage path of the dredged fill, accelerate the consolidation speed, and have a large treatment depth; at the same time, the materials forming the three-dimensional drainage network are all green and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of a rapid processing structure for filling a land base according to the utility model. DETAILED DESCRIPTION

[0016] The utility model will be further described below in conjunction with the accompanying drawings.

[0017] See also Figure 1 The utility model discloses a rapid treatment structure for filling land foundation, comprising a multi-layer horizontal drainage channel 1 and a vertical drainage channel, a drainage cushion layer 3 and a pre-compressed pile loading material 4.

[0018] The multi-layer horizontal drainage channel 1 is arranged in the soft soil layer formed by blowing fill into the land foundation at intervals of 5 to 8 meters from bottom to top; each layer of the horizontal drainage channel 1 includes a lower layer of permeable non-woven fabric 11, a sand layer 12 laid on the lower layer of permeable non-woven fabric 11, and an upper layer of permeable non-woven fabric 13 laid on the sand layer 12; the thickness of the sand layer 12 is 0.1 to 0.3 meters, and the permeability coefficient of the sand layer 12 is not less than 1*10 -2 cm / s of medium-coarse sand; the lower layer of water-permeable non-woven fabric 11 and the upper layer of water-permeable non-woven fabric 13 are both made of degradable water-permeable non-woven fabric.

[0019] The vertical drainage channel is composed of a plurality of granular piles 2, which are vertically sunk from the ground surface of the blown-filled land foundation into the blown-filled land foundation, and the bottoms of the plurality of granular piles 2 are 2 to 4 meters lower than the top of the hard soil layer of the blown-filled land foundation; the plurality of granular piles 2 are arranged in a square or an equilateral triangle, and the arrangement spacing is 1.2 to 2.5 meters; the pile diameter of each granular pile 2 is 0.5 to 1 meter; the granular piles 2 are crushed stone piles, compacted sand piles, bagged granular or sand and gravel mixed piles.

[0020] The multi-layer horizontal drainage channels 1 and the plurality of granular piles 2 form a three-dimensional drainage network.

[0021] The drainage cushion layer 3 is arranged on the ground surface formed by blowing and filling the land foundation; the drainage cushion layer adopts a sand cushion layer with a thickness of 0.1 to 0.3 m.

[0022] The pre-compressed pile loading material 4 is arranged on the top surface of the drainage cushion layer 3; the pre-compressed pile loading material 4 can be made from local materials, such as broken stones, sand layers and other permeable materials, and the loading height is consistent with the design.

[0023] The rapid processing structure of the land base formed by blowing fill of the utility model is processed according to the following steps:

[0024] Step 1: Before the soft soil filling construction, it is necessary to build a protective structure around the land area to form a closed water-stop curtain and then drain the surface water of the site;

[0025] Step 2: Start the land filling construction by arranging the land filling pipeline system to carry out the land filling construction of soft soil. After the land filling reaches a height of 5 to 8 m, first lay the lower layer of water-permeable non-woven fabric 11, then lay a sand layer 12 with a thickness of 0.1 to 0.3 m on the lower layer of water-permeable non-woven fabric 11, and then lay the upper layer of water-permeable non-woven fabric 13 on the sand layer 12;

[0026] Step 3: Continue to blow fill the soft soil; if the filling thickness of the site exceeds 5-8m, repeat step 2 when the filling reaches 5-8m, until the filling reaches the designed elevation;

[0027] Step 4: Start constructing the granular pile 2, first make a pile hole, then backfill the granular into the pile hole to form the granular pile 2; the bottom of the granular pile 2 is 2 to 4 meters lower than the top of the hard soil layer, the pile diameter of the granular pile 2 is 0.5 to 1 meter, and the pile spacing of multiple granular piles 2 is 1.2 to 2.5 meters; if the site has higher requirements for the bearing capacity of the foundation in the later use stage, the grouting pipe 5 can be inserted into the pile hole in advance, and then the granular can be backfilled;

[0028] Step 5: After all vertical granular piles 2 are constructed, a drainage cushion layer 3 with a thickness of 0.1 to 0.3 m is laid on the surface of the site, using materials with good drainage capacity;

[0029] Step 6: After the drainage cushion layer 3 is laid, a pre-loaded pile material 4 is arranged on the drainage cushion layer 3 to pre-load the ground surface; the pre-loaded pile material 4 uses permeable materials such as project surrounding materials, broken stones, sand layers, etc., and the pile height is consistent with the design;

[0030] Step 7: After the preloading cycle is over, if the site has higher requirements for the bearing capacity of the foundation in the later use stage, cement mortar is injected into the granular pile 2 through the grouting pipe 5 to improve the bearing capacity of the foundation.

[0031] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Technicians in the relevant technical field can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A rapid treatment structure for filling land foundation, comprising multiple layers of horizontal drainage channels and vertical drainage channels, a drainage cushion layer and a pre-compressed pile load; characterized in that: The multi-layer horizontal drainage channels are arranged at intervals from bottom to top in the soft soil layer formed by blowing and filling into the land foundation; each layer of the horizontal drainage channel comprises a lower layer of water-permeable non-woven fabric, a sand layer laid on the lower layer of water-permeable non-woven fabric, and an upper layer of water-permeable non-woven fabric laid on the sand layer; The vertical drainage channel is composed of a plurality of granular piles, which are vertically sunk from the surface of the land foundation formed by blowing and filling into the land foundation formed by blowing and filling, and the bottoms of the plurality of granular piles are lower than the top of the hard soil layer formed by blowing and filling into the land foundation; Multi-layer horizontal drainage channels and multiple granular piles form a three-dimensional drainage network; The drainage cushion layer is arranged on the ground surface of the land foundation formed by blowing and filling; The pre-compressed pile load is arranged on the top surface of the drainage cushion layer.

2. The rapid processing structure for filling into land base according to claim 1 is characterized in that: The spacing between the multi-layer horizontal drainage channels is 5 to 8 meters; the thickness of the sand layer in each horizontal drainage channel is 0.1 to 0.3 meters, and the permeability coefficient of the sand layer is not less than 1*10 -2 cm / s of medium-coarse sand.

3. The rapid processing structure for filling land base according to claim 1 is characterized in that: The granular pile has a diameter of 0.5 to 1 m; the granular piles are arranged in a square or regular triangle with a spacing of 1.2 to 2.5 m; the bottom of the granular piles is 2 to 4 m lower than the top of the hard soil layer formed by blowing into the land foundation.

4. The rapid processing structure for filling land base according to claim 1 or 3, characterized in that: The granular body pile is a crushed stone pile, a compacted sand pile, a bagged granular body or a sand-gravel mixed pile.

5. The rapid processing structure for filling into land base according to claim 1 is characterized in that: The drainage cushion layer is a sand cushion layer with a thickness of 0.1 to 0.3 m.

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