CN114318982A - Foam light soil supporting structure for building large-area terrace - Google Patents

Abstract

The invention discloses a foam lightweight soil supporting structure for constructing a large-area terrace, which comprises a side slope base, a foam lightweight soil supporting main body, a blocking and protecting mechanism and an anti-cracking mechanism, wherein the foam lightweight soil supporting main body is arranged on the side slope base, the anti-cracking mechanism is arranged in the foam lightweight soil supporting main body, the blocking and protecting mechanism is used for blocking and protecting the foam lightweight soil supporting main body, a plurality of anchor rods are arranged in the foam lightweight soil supporting main body, each anchor rod comprises a first section inserted in the foam lightweight soil supporting main body and a second section inserted in the side slope base, and a soil fixing mechanism used for stably fixing the foam lightweight soil supporting main body is arranged on the first section of each anchor rod. The foam light soil supporting structure for constructing the large-area terrace has the advantages of firm structure, strong stability, low manufacturing cost, short construction period and the like.

Description

A foam lightweight soil support structure for building large-area pad

technical field

The invention relates to the technical field of civil engineering, in particular to a foam light-weight soil support structure for building a large-area pad.

Background technique

The western part of my country has high terrain and complex terrain, dominated by plateaus and mountains, with large undulations and extensive slope deposits. The north-west direction belongs to a typical continental arid climate, with a cold climate and a large temperature difference between day and night. However, based on the unbalanced infrastructure development strategy of my country's regional coordinated development, the transportation industry is also developing rapidly. The western region of our country implements the development strategy of "moderately advanced" infrastructure. Due to the influence of the terrain, geology and climate in the west, when constructing large-scale fields such as expressway service areas, railway stations and airports, it is necessary to comprehensively consider various factors to artificially fill the land. How to build a large-scale field under complex terrain It has become a substantive problem that needs to be solved urgently.

The mountain leveling and filling project under the traditional method is large in scale, long in construction time, and has remarkable characteristics such as filling height and self-weight. In addition, the large temperature difference between day and night in the mountainous plateau terrain leads to the disadvantages of poor stability and easy subsidence. Under the action of large fill load of high fill, the deformation of the base of the lower part of the fill body is relatively large. During the filling process, the total settlement and settlement rate should be controlled to ensure the stability of the fill body and the foundation, and the construction difficulty can be imagined. , the cost problem can not be ignored. At the same time, the traditional support structure has size limitations. For super high fill, the high support structure is not conducive to the stability of the whole and the structure itself. Therefore, there is an urgent need for a new type of support structure that can create a large-area pad under complex terrain conditions.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a foam light soil support structure for building a large-area pad with firm structure, strong stability, low cost and short construction period.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

A foam light soil support structure for building a large-area field floor, comprising a slope base, a foam light soil support body, a blocking mechanism and an anti-cracking mechanism, the foam light soil support body is arranged on the side On the slope base, the anti-cracking mechanism is arranged in the foam light soil support body, the shielding mechanism is used to protect the foam light soil support body, and a plurality of anchor rods are arranged in the foam light soil support body , the anchor rod includes a first section inserted in the foam lightweight soil support body and a second section inserted in the slope base, and the first section of the anchor rod is provided with a structure for stabilizing and fixing the foam lightweight soil. The soil-fixing mechanism of the soil-supporting body.

In the above-mentioned foam light-weight soil support structure for building a large-area pad, preferably, the soil-fixing mechanism includes a plurality of sets of soil-fixing components spaced along the length of the anchor rod, and the soil-fixing components include multiple sets of soil-fixing components. A tie rod is arranged at intervals along the circumferential direction of the anchor rod.

In the above-mentioned foam light soil support structure for building a large-area field flat, preferably, the inclination angle of the anchor rod relative to the horizontal plane is 15° to 25°, and the angle between the tie rod and the anchor rod is β, 30°<β<45°, and the tie rod is inclined toward the second section of the anchor rod.

In the above-mentioned foam light-weight soil support structure for building a large-area field floor, preferably, the anti-cracking mechanism includes a plurality of metal wire mesh layers arranged at intervals up and down.

In the above-mentioned foam light-weight soil support structure for building a large-area field flat, preferably, the wire mesh layer is formed by splicing a plurality of wire mesh sheets, and two adjacent wire mesh sheets are overlapped with each other, and The overlapping width is 10cm-20cm, and the overlapping parts of two adjacent wire mesh sheets are anchored by U-shaped nails.

The above-mentioned foam lightweight soil support structure for building a large-area field flat, preferably, a plurality of the metal wire mesh layers separate the foam lightweight soil support body into multiple layers of foam lightweight soil layers, and the multi-layer The height of the foam light soil layer gradually decreases from bottom to top.

In the above-mentioned foam lightweight soil support structure for building a large-area field pad, preferably, the retaining mechanism includes a retaining wall and a retaining wall, the retaining wall is arranged at the lower part of the foam lightweight soil supporting body, and the retaining wall is arranged The upper part of the foam lightweight soil support body is connected with the retaining wall.

In the above-mentioned foam light-weight soil support structure for building a large-area field, preferably, the retaining wall includes a first waterproof geomembrane, a first gravel cushion layer and a first concrete layer, and the first waterproof geomembrane is fitted It is arranged on the foam light soil support body, the first sand and gravel cushion is arranged on the first waterproof geomembrane, and the first concrete layer is arranged on the first sand and gravel cushion.

In the above-mentioned foam light-weight soil support structure for building a large-area pad, preferably, a concrete permeable cushion is provided at the interface between the foam light-weight soil support body and the slope base.

In the above-mentioned foam light soil support structure for building a large-area field, preferably, a protective layer is provided on the top of the foam light soil support body, and the protective layer includes a second waterproof layer stacked in sequence from bottom to top. Geomembrane, second gravel layer and second concrete layer.

Compared with the prior art, the advantages of the present invention are:

The foam lightweight soil support structure for building a large-area field of the present invention improves the anti-cracking ability of the foam lightweight soil support body by arranging a crack resistance mechanism in the foam lightweight soil support body, and stabilizes the foam light soil support body through the soil fixing mechanism. Fix the foam light soil support body, prevent the foam light soil support body from slumping damage, and enhance the overall stability of the support structure. Therefore, it is possible to build a large-area field pad on top of the foam lightweight soil support body. Since the western part is mostly mountainous terrain, it is inevitable to pass through high and steep slopes with complex terrain. When the terrain conditions are too complicated, or the slope land is limited, the foam light soil support structure of the present invention can effectively create a large-area field. . The traditional filling engineering has the remarkable characteristics of high filling height, self-heavy filling volume and high filling volume. At the same time, the traditional support structure is limited in size, and this support structure is mainly made of foamed light soil, which can reduce the amount of grading, reduce the construction land, save the cost and shorten the construction period compared with the traditional filling project; Lighter than the weight, the bearing capacity of the base is small, and the settlement is small.

Description of drawings

Figure 1 is a schematic structural diagram of a foam lightweight soil support structure for building a large-area pad.

Figure 2 is a schematic view of the front structure of the anchor rod.

FIG. 3 is a schematic top view of the structure of the anchor rod.

FIG. 4 is a schematic structural diagram of a shielding mechanism.

FIG. 5 is an enlarged view of A in FIG. 4 .

illustration:

1. Foam light soil supporting body; 2. Anchor rod; 3. Tie rod; 4. Wire mesh layer; 5. Retaining wall; 6. Retaining wall; 61. The first waterproof geomembrane; 62. The first gravel cushion; 63. First concrete layer; 7. Concrete permeable cushion; 8. Protective layer; 100. Slope base.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 , the foam lightweight soil support structure for constructing a large-area pad in this embodiment includes a slope base 100 , a foam lightweight soil support body 1 , a retaining mechanism and an anti-cracking mechanism. The soil support body 1 is arranged on the slope base 100, the anti-cracking mechanism is arranged in the foam light soil support body 1, the shielding mechanism is used to protect the foam light soil support body 1, and the foam light soil support body 1 is provided with There are multiple anchor rods 2, the anchor rod 2 includes a first section inserted in the foam light soil support body 1 and a second section inserted in the slope base 100, the first section of the anchor rod 2 is provided with a The soil fixing mechanism is used to stabilize and fix the foam light soil supporting body 1 . By arranging an anti-cracking mechanism in the foam light soil supporting body 1, the crack resistance of the foam light soil supporting body 1 is improved, and the foam light soil supporting body 1 is stably fixed by the soil fixing mechanism, preventing the foam light soil supporting body 1 1. Collapse damage occurs and the overall stability of the support structure is enhanced. The foam light soil support body 1 has a firm structure, strong stability, and a large top area, which can meet the performance requirements of a large-area field floor for the support structure. A large area pad is constructed on the top of the light soil supporting body 1 . Since the western part is mostly mountainous terrain, it is inevitable to pass through high and steep slopes with complex terrain. When the terrain conditions are too complicated, or the slope land is limited, the foam light soil support structure of the present invention can effectively create a large-area field. . The traditional filling engineering has the remarkable characteristics of high filling height, self-heavy filling volume and high filling volume. At the same time, the traditional support structure is limited in size, and this support structure is mainly made of foamed light soil, which can reduce the amount of grading, reduce the construction land, save the cost and shorten the construction period compared with the traditional filling project; Lighter than the weight, the bearing capacity of the base is small, and the settlement is small.

The foam lightweight soil support structure of the present invention can construct a large-area field under the condition that the landfilling of the slope in difficult and dangerous mountainous areas is limited to replace the traditional high-filling project, which greatly reduces the amount of filling and avoids the need for filling. It can effectively reduce the amount of grading, reduce the construction land, save the cost, and shorten the construction period; compared with the traditional filling project, because of this cost The structure only uses foam light soil, which is lighter in weight and requires less base bearing capacity and less settlement. Foam lightweight soil is light in weight, has a good application for the upper cover and field floor, and has a high engineering economic effect. At present, the reasonable price in my country's market is between 200-350 yuan per square. Foamed lightweight soil also has good durability, with properties similar to cement. Because the foam lightweight soil has a large number of pores, it has good frost resistance and thermal insulation, and it is very suitable for the mountainous terrain in southwest my country. Since only foamed lightweight soil is used, the cost is lower while the strength is guaranteed, the production and construction process meets the requirements of environmental protection, the construction is convenient, and it has the prospect of popularization and application, and can obtain relatively significant economic and social benefits. The soil is mainly mixed with foam made of a foaming agent and cement and pumped by a pump, which is fast and can be transported over long distances. It can play an important and significant role in the infrastructure construction in mountainous and hilly areas. In addition, the foam lightweight soil is an inorganic material and has good environmental benefits, which not only ensures the economic benefits of the project, but also ensures the environmental protection work.

As shown in FIGS. 1 to 3 , in this embodiment, the soil-fixing mechanism includes a plurality of sets of soil-fixing components arranged at intervals along the longitudinal direction of the bolt 2 , and the soil-fixing components include a plurality of soil-fixing components arranged at intervals along the circumference of the bolt 2 . Pull rod 3. Each group of soil-fixing components includes four tie rods 3 , and the four tie rods 3 are evenly distributed along the circumferential direction of the anchor rod 2 . The length of the tie rod 3 is 0.5 m to 1.2 m. The contact area between the anchor rod 2 and the foam light soil supporting body 1 can be increased by the tie rod 3, the volume of the anchor body can be increased, the pulling and anchoring ability of the foam light soil supporting body 1 can be effectively improved, and the foam light soil supporting body 1 can be effectively improved. The support body 1 produces slump failure, which enhances the overall stability of the support structure. The anchor rod 2 can increase the bonding friction between the anchor body and the foam light soil supporting body 1, increase the bearing effect of the anchor body, and can effectively connect the foam light soil supporting body 1 and the slope base 100 to reinforce The role of the slope base 100 . For the soil that is easy to collapse, 2cm-3cm of concrete is sprayed on the slope base 100. After the concrete is solidified, a mechanical drilling rig is used to mechanically form a hole and place the anchor rod 2, and then grouting is performed. The plurality of anchor rods 2 are arranged in multiple rows spaced from bottom to top along the slope surface of the slope base 100, the spacing between two adjacent rows is 1m-2m, and the spacing between two adjacent anchor rods 2 in the same row is 1.5m ~2m. The length of each anchor rod 2 is 6m to 12m.

As shown in Figures 1 and 2, in this embodiment, the inclination angle of the anchor rod 2 relative to the horizontal plane is 15° to 25°, the angle between the tie rod 3 and the anchor rod 2 is β, and 30°<β<45° , and the tie rod 3 is inclined to the second section of the anchor rod 2 . It is beneficial to improve the pulling and anchoring ability of the soil fixing mechanism to the supporting body 1 of the foam light soil, and the mechanical properties of the tie rod 3 are superior, which is beneficial to improving the stability of the supporting structure.

As shown in FIG. 1 , in this embodiment, the anti-crack mechanism includes a plurality of wire mesh layers 4 arranged at intervals up and down. The surface of the wire mesh layer 4 is galvanized. The anti-cracking mechanism has a simple structure and convenient construction, which is beneficial to improve the construction efficiency.

In this embodiment, the wire mesh layer 4 is formed by splicing a plurality of wire mesh sheets, and two adjacent wire mesh sheets are overlapped with each other, and the overlap width is 10 cm to 20 cm. The site is anchored with staples. The connection between each wire mesh sheet is firm, and the metal wire mesh layer 4 has good structural stability.

As shown in FIG. 1 , in this embodiment, a plurality of metal wire mesh layers 4 separate the foam lightweight soil support body 1 into multi-layer foam lightweight soil layers, and the height of the multi-layer foam lightweight soil layers gradually decreases from bottom to top Small. When pouring a foam light soil structure with a large height, it is necessary to perform layered pouring. The height of each layer of foam light soil layer is 0.5m to 1.0m. Appropriately increase the layer height, the area of the foam light soil layer on the upper part of the structure is large, in order to control the amount of pouring each time, the layer height can be appropriately reduced. In the layer-by-layer pouring process, the upper layer of foam light soil is required to be poured before the initial setting of the adjacent lower layer of foam light soil. When the pouring area is large, it shall be poured in sub-blocks, and the area of each block is 200m ² ~ 300m ² . The specific pouring method is to set up a rectangular block for pouring, and pour concrete from the middle of the long side to both ends. If more than one pouring pipe is used, pouring from both ends to the middle or diagonal pouring can also be used. When pouring concrete, the pouring process of "zonal fixed point, one slope, sequential advancement, and one time to the top" should be adopted.

As shown in FIG. 1 , FIG. 4 and FIG. 5 , in this embodiment, the blocking mechanism includes a blocking wall 5 and a protective wall 6 , the blocking wall 5 is arranged at the lower part of the foam lightweight soil supporting body 1 , and the protective wall 6 is arranged on the foam lightweight soil. The soil supports the upper part of the main body 1 and is in contact with the retaining wall 5 . The retaining wall 5 is made of reinforced concrete, and the retaining wall 5 can effectively resist the overturning and sliding of the slope base 100, can effectively prevent the sliding of the slope of the foam light soil supporting body 1, and improve the rigidity and integrity of the structure . The protective wall 6 makes the structure of the foam light soil supporting body 1 high-strength and durable, and resists erosion and freezing and thawing, can maintain the long-term stability of the structure, and plays the role of wave absorption and earthquake resistance.

As shown in FIG. 1 , FIG. 4 and FIG. 5 , in this embodiment, the protective wall 6 includes a first waterproof geomembrane 61 , a first sand and gravel cushion layer 62 and a first concrete layer 63 , and the first waterproof geomembrane 61 is fitted and arranged on the On the foam light soil supporting body 1 , the first sand and gravel cushion layer 62 is arranged on the first waterproof geomembrane 61 , and the first concrete layer 63 is arranged on the first sand and gravel cushion layer 62 . The first waterproof geomembrane 61 can isolate water and prevent the foam light soil supporting body 1 from being eroded by water. The first sand and gravel cushion layer 62 can improve the frost resistance of the protective wall 6, and play an excessive role in adapting to deformation under the action of temperature difference, preventing Frost heave damage occurs. After the pouring of the foam lightweight soil supporting body 1 is completed, the slope surface of the foam lightweight soil supporting body 1 is measured and staked, and the slope is trimmed to make the slope smooth. Lay, then lay the first sand and gravel cushion layer 62 on the first waterproof geomembrane 61, then remove impurities, use mortar for jointing, then pour the first concrete layer 63 on the first sand and gravel cushion layer 62, and then artificially level the surface , and finally the cast-in-situ concrete slope protection construction of the slope surface and the setting of expansion joints. Set up an expansion joint every 5m, and the width of each expansion joint is 2cm.

As shown in FIG. 1 , in this embodiment, a concrete water-permeable cushion layer 7 is provided at the interface between the foam lightweight soil supporting body 1 and the slope base 100 . The concrete water-permeable cushion layer 7 can play a role in drainage, prevent water accumulation on the base, and prevent the foam light soil supporting body 1 from being eroded by groundwater. The interface between the permeable slope base 100 and the foam light soil supporting body 1 is provided with multi-step steps, the height of a single step is 0.5m-1.0m, and the size and aspect ratio of the steps are adjusted according to the slope rate of the slope base 100 , and the aspect ratio is not greater than 1:0.75. After the slope base 100 is processed into a stepped shape, first remove the dregs on the surface of the slope base 100 , then lay a concrete permeable cushion 7 on the slope base 100 , and lay a geomembrane on the concrete permeable cushion 7 . The slope base 100 has a strong structure, which is beneficial to improve the stability of the foam light soil supporting structure.

As shown in FIG. 1 , in this embodiment, a protective layer 8 is provided on the top of the foam lightweight soil supporting body 1 , and the protective layer 8 includes a second waterproof geomembrane, a second gravel layer and a second concrete layer. After the foam light soil support body 1 is poured, the top of the foam light soil support body 1 is trimmed and compacted, and a second geotechnical anti-seepage membrane is laid on the top of the foam light soil support body 1 to prevent water infiltration; Lay a second sand and gravel cushion on the second geotechnical impermeable membrane, remove impurities and use mortar to make joints, artificially level the surface, and then pour a second concrete layer on the second sand and gravel cushion. The second concrete layer includes a plurality of reinforced concrete slabs arranged in the horizontal direction. The reinforced concrete slabs are cast in place. The length of the reinforced concrete slabs is 6m to 15m, the aspect ratio does not exceed 2.5:1, and the area of the reinforced concrete slabs is greater than 45m. ^2. The thickness is 18cm～21cm, and the reinforcement ratio is 0.6%～0.8%. The caulking width of two adjacent reinforced concrete slabs shall be 15mm to 20mm, and the caulking height shall be 15mm lower than the slab surface. Fill the joint with foam board and smooth the surface with mortar.

The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, improvements and transformations obtained without departing from the technical concept of the present invention should also be regarded as the protection scope of the present invention.

Claims (10)

1. A foam lightweight soil support structure for use in the construction of large area lawns, characterized by: including side slope basement (100), foam lightweight soil supporting body (1), fender protect mechanism and anti-crack mechanism, foam lightweight soil supporting body (1) sets up on side slope basement (100), anti-crack mechanism sets up in foam lightweight soil supporting body (1), keep off and protect the mechanism and be used for keeping off foam lightweight soil supporting body (1), be equipped with many stock (2) in foam lightweight soil supporting body (1), stock (2) are including inserting the first section of locating in foam lightweight soil supporting body (1) and inserting the second section of locating in side slope basement (100), be equipped with the solid native mechanism that is used for steadily pricking fixed foam lightweight soil supporting body (1) on the first section of stock (2).

2. The foam lightweight soil support structure for constructing large area lawns according to claim 1, wherein: the soil fixing mechanism comprises a plurality of groups of soil fixing components arranged at intervals along the length direction of the anchor rod (2), and the soil fixing components comprise a plurality of pull rods (3) arranged at intervals along the circumferential direction of the anchor rod (2).

3. The foam lightweight soil support structure for constructing large area lawns according to claim 2, wherein: the inclination angle of the anchor rod (2) relative to the horizontal plane is 15-25 degrees, the included angle between the pull rod (3) and the anchor rod (2) is beta, beta is larger than 30 degrees and smaller than 45 degrees, and the pull rod (3) inclines to the second section of the anchor rod (2).

4. The foam lightweight soil support structure for constructing large area lawns according to claim 1, wherein: the anti-cracking mechanism comprises a plurality of metal wire mesh layers (4) which are arranged at intervals up and down.

5. The foam lightweight soil support structure for constructing large area lawns according to claim 4, wherein: the metal wire mesh layer (4) is formed by splicing a plurality of wire mesh sheets, two adjacent wire mesh sheets are mutually overlapped, the overlapping width is 10 cm-20 cm, and the overlapping parts of the two adjacent wire mesh sheets are anchored through U-shaped nails.

6. The foam lightweight soil support structure for constructing large area lawns according to claim 4, wherein: the plurality of metal wire mesh layers (4) divide the foam light soil supporting body (1) into a plurality of layers of foam light soil layers, and the heights of the plurality of layers of foam light soil layers are gradually reduced from bottom to top.

7. The foam lightweight soil support structure for constructing large area lawns according to claim 1, wherein: the retaining and protecting mechanism comprises a retaining wall (5) and a retaining wall (6), wherein the retaining wall (5) is arranged at the lower part of the foam light soil supporting main body (1), and the retaining wall (6) is arranged at the upper part of the foam light soil supporting main body (1) and is connected with the retaining wall (5).

8. The foam lightweight soil support structure for constructing large area lawns according to claim 7, wherein: the retaining wall (6) comprises a first waterproof geomembrane (61), a first gravel cushion layer (62) and a first concrete layer (63), the first waterproof geomembrane (61) is attached to and arranged on the foam lightweight soil supporting body (1), the first gravel cushion layer (62) is arranged on the first waterproof geomembrane (61), and the first concrete layer (63) is arranged on the first gravel cushion layer (62).

9. The foam lightweight soil support structure for construction of large area lawns according to any one of claims 1 to 8, wherein: and a concrete permeable cushion layer (7) is arranged at the interface of the foam lightweight soil supporting main body (1) and the side slope base (100).

10. The foam lightweight soil support structure for construction of large area lawns according to any one of claims 1 to 8, wherein: the top of foam lightweight soil supporting main part (1) is equipped with inoxidizing coating (8), inoxidizing coating (8) include by lower supreme waterproof geomembrane of second, second gravel layer and the second concrete layer of superpose in proper order.

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