A foam lightweight soil - silo combined structure for constructing a high - field platform

Abstract

The present invention discloses a foam lightweight soil - silo combined structure for constructing a high - field flat, which includes a supporting part arranged on the upper side of the slope and a retaining part arranged on the lower side of the slope. The supporting part is formed by pouring foam lightweight soil, and the supporting part is retained by the retaining part. The retaining part includes interconnected cylinders, and the lower end of the cylinder is connected to the base of the slope. The foam lightweight soil - silo combined structure of the present invention combines a silo - type structure and a foam lightweight soil structure, having good overall stability. Using this lightweight structure can greatly reduce the filling volume, decrease the floor area, shorten the construction period, and reduce the project cost. Using this structure can ensure the long - term safety and reliability of the infrastructure functions in difficult mountainous areas, and meet the actual needs of the continuous development of China's transportation construction in the difficult mountainous areas in the western region, and can generate huge economic and social benefits.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and particularly relates to a foam lightweight soil - silo combination structure for constructing a high fill platform. Background Art

[0002] In mountainous and hazardous areas, the natural environment is harsh, the terrain is rugged and dangerous, and the geological structure is complex. The construction of large - area high fill platforms is restricted by factors such as the geometric shape of the site space, the size of the site, and the nature of the site strata. Therefore, how to solve the problem of constructing large - area high fill platforms under multi - dimensional restricted conditions in mountainous and hazardous areas has become an urgent problem to be solved.

[0003] Traditional high fill projects usually adopt the method of layered filling and layered compaction. They have the characteristics of large filling volume, large floor area, high construction difficulty, and high project cost. Since it is difficult to ensure the compaction degree of the filling materials during construction, problems such as instability and uneven settlement often occur during the later use process. At the same time, the overly high fill body also poses high requirements for the bearing capacity of the foundation. If you want to reduce the slope of the fill body to reduce the filling volume and floor area, you need to use a retaining structure to protect the fill body. Due to limited dimensions, traditional retaining structures are not suitable for retaining high fills. Setting overly high retaining structures cannot guarantee the stability of the structure itself and the high fill. Therefore, a new structure that can be used to construct large - area high fill platforms under complex terrain conditions is needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a foam lightweight soil - silo combination structure and method for constructing a high fill platform, so as to mainly solve the problems of constructing large - area high fill platforms under complex terrain conditions and the problem of reclaiming land by filling when the land for the slope is limited.

[0005] To achieve the above - mentioned purpose, the present invention discloses a foam lightweight soil - silo combination structure for constructing a high fill platform, which includes a supporting part arranged on the upper side of the slope and a retaining part arranged on the lower side of the slope. The supporting part is formed by pouring foam lightweight soil, and the supporting part is retained by the retaining part. The retaining part includes interconnected cylinders, and the lower end of the cylinder is connected to the base of the slope.

[0006] Furthermore, the top surface of the supporting part is set as a plane for creating a large - area platform and supporting the overlying load. The interface between the bottom of the supporting part and the slope is provided with multiple levels of steps, and the height of any one of the steps is 0.5m - 1.0m, and the width is not less than 1.0m.

[0007] Furthermore, it also includes multiple anchor rods. One end of the anchor rod is anchored in the foam lightweight soil, and the other end is anchored in the soil body of the slope.

[0008] Furthermore, the cross-section of the cylinder is rectangular or square, and through holes for connecting devices are provided on the side wall of the cylinder.

[0009] Furthermore, the connecting device includes bolts, nuts and gaskets. The bolts pass through the through holes of two adjacent cylinders. The tail ends of the bolts are fastened by nuts, and the gaskets are disposed between the nuts and the inner walls of the cylinders and between the heads of the bolts and the inner walls of the cylinders.

[0010] Furthermore, the height of the supporting part is 20 - 50 m.

[0011] Furthermore, the hollow part of the cylinder is filled with ballast filler.

[0012] Furthermore, the cross-sectional width of the cylinder is 0.8 - 1.2 m, and the wall thickness of the cylinder is 0.10 - 0.13 times the cross-sectional width of the cylinder.

[0013] Furthermore, in the descending direction of the slope, the top height of the cylinder gradually decreases, and the difference in the top heights of adjacent cylinders is 1.2 - 1.7 times the cross-sectional width of the cylinder.

[0014] Furthermore, the top of the cylinder near the supporting part is 5 - 15 m lower than the top of the supporting part, and a protective wall made of aerated concrete blocks is provided on the free face above the side of the supporting part in contact with the cylinder.

[0015] Compared with the prior art, the advantages of the present invention are as follows:

[0016] The foam light soil - silo combined structure of the present invention uses the silo - type structure as the retaining part and the foam light soil structure as the supporting part, and is mainly used for the construction of large - area pavements such as railway, highway service areas, municipal land - reclamation sites and airport pavements under the conditions of limited land use or complex terrain. The foam light soil has the characteristics of light weight, compression resistance and good durability. Using the foam light soil as the filling material, it can be constructed by in - situ casting. The construction speed is fast, and the structure after solidification has good integrity and can be closely combined with anchor bolts and the silo - type retaining part. The porous nature of the foam light soil gives it good shock - absorption performance, and it can well absorb and disperse the impact loads caused by trains, automobiles, etc. Since the density of the foam light soil is much smaller than that of the soil, using this filling material can greatly reduce the strength requirements for the foundation, effectively avoid the problems of excessive foundation stress and large foundation deformation, and at the same time greatly reduce the acting force of the filling on the retaining structure. In addition, the foam light soil belongs to a neutral inorganic material, and the foaming agent used does not contain harmful substances, so it can avoid environmental pollution.

[0017] There are height limitations in the vertical filling using foamed lightweight soil in the present invention. Therefore, for high fill embankments, the present invention adopts a silo-type retaining structure to retain the filling body. Compared with traditional retaining structures, the silo-type structure is not restricted by the structural height and has excellent stress and deformation characteristics. The silo-type structure plays a role in retaining the filling material, which can effectively reduce the slope range of the filling body, enhance the stability of the filling material, and increase the filling height of the foamed lightweight soil. Additionally, anchor bolts are provided to further enhance the stability of the support structure. One end of the anchor bolt is anchored in the foamed lightweight soil, and the other end is anchored in the slope soil mass, which can transfer a part of the load received by the support part to the surrounding stable soil mass through the anchor bolt. At the same time, it also strengthens the integrity of the support part and the slope, reducing the possibility of the support part sliding and overturning along the slope surface.

[0018] The foamed lightweight soil - silo combined structure of the present invention combines a silo-type structure and a foamed lightweight soil structure, having good overall stability. Using this lightweight structure can greatly reduce the filling volume, reduce the floor area, shorten the construction period, and reduce the project cost. Using this structure can ensure the long-term safety and reliability of infrastructure functions in difficult mountainous areas, and can generate huge economic and social benefits.

[0019] The present invention will be further described in detail below with reference to the accompanying drawings. Description of the Drawings

[0020] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0021] Figure 1 is a schematic diagram of the foamed lightweight soil - silo combined structure for constructing a high field flat disclosed in the preferred embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of the internal structure of the cylinder in the foamed lightweight soil - silo combined structure for constructing a high field flat disclosed in the preferred embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the connection structure of the cylinder in the foamed lightweight soil - silo combined structure for constructing a high field flat disclosed in the preferred embodiment of the present invention.

[0024] Legend:

[0025] 1. Cylinder; 11. Through hole; 12. Connecting device; 121. Bolt; 122. Nut; 123. Gasket; 2. Support part; 21. Step; 3. Retaining part; 4. Ballast filling; 5. Anchor bolt; 6. Protection wall. Detailed Embodiments

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways defined and covered by the claims.

[0027] As Figures 1-3 shown, the present invention discloses a foam lightweight soil - silo combined structure for constructing a high - level platform, including a supporting part 2 made of foam lightweight soil and a retaining part 3 composed of a silo - type structure. The supporting part 2 is formed by pouring foam lightweight soil, and its top surface is flat, which is used to create a large - area platform and support the overlying load. Railway stations, highway service areas, municipal land - reclamation platforms, airport platforms and other structural facilities can be built on the platform. A multi - level step 21 is arranged at the interface between the bottom of the supporting part 2 and the slope. The height of the step 21 is 0.5 m to 1.0 m, and the width is not less than 1.0 m. In actual engineering, the specific value of the step size depends on the slope gradient and terrain conditions. The step 21 plays a role in blocking the downward sliding of the supporting part 2, thereby enhancing the anti - sliding ability of the supporting part 2. Anchor bolts 5 need to be arranged in some areas of the supporting part 2 to enhance the stability of the supporting part 2. The anchor bolts 5 can enhance the integrity of the supporting part 2 and the slope, and reduce the possibility of the supporting part 2 sliding and overturning along the slope. In this setting method, the lightweight foam lightweight soil is used instead of the commonly used filling materials, which greatly reduces the self - weight of the filling part, so the later settlement is effectively alleviated; and compared with the traditional soil - filled filling structure, the foam lightweight soil has strong compressive strength, good durability, good integrity and stronger stability; at the same time, the porous nature of the foam lightweight soil gives it good shock - absorption performance, which can well absorb and disperse the impact loads caused by trains, cars, etc., and has better mechanical properties; in addition, the foam lightweight soil can be constructed by on - site pouring, with fast construction speed, which can effectively shorten the construction period.

[0028] The retaining part 3 is composed of a plurality of pre - fabricated cylinders 1. The cylinders 1 are connected to the base of the slope in the vertical direction, and the cylinders 1 are closely arranged adjacent to each other. In the downward direction of the slope, the cylinders 1 are arranged in a stepped shape with the top gradually decreasing from the end adjacent to the supporting part 2 to the other end. Compared with the traditional retaining structure, the silo - type structure adopts the stepped arrangement structure of the cylinders 1, which is not limited by the structure height and has excellent mechanical deformation characteristics. The silo - type structure plays a role in retaining the filling material, which can effectively reduce the slope range of the filling body and enhance the stability of the filling material, so as to increase the filling height of the foam lightweight soil. In this embodiment, depending on the specific position of the platform, the retaining part 3 can be arranged at any side wall of the supporting part 2 that needs to be retained.

[0029] The structure of the cylinder 1 is simple and easy to manufacture, and the prefabricated cylinder 1 can effectively shorten the on-site construction period. Compared with the traditional retaining structure, its single structure is light, so the demand for construction equipment is reduced, and the construction difficulty and cost are further reduced. In this embodiment, the hollow part of each cylinder 1 is filled with a ballast filler 4. The ballast filler 4 not only increases the self-weight of the cylinder 1 structure, improves the anti-sliding and anti-overturning ability of the structure, but also fills the hollow part, optimizes the stress and deformation characteristics and stability of the cylinder 1, improves the shear resistance of the cylinder 1 with a longer length, enables its bearing capacity characteristics to meet the requirements of the actual project, and can be used to realize the retaining of the supporting part 2 under multi-dimensional restricted conditions.

[0030] In this embodiment, one end of the anchor rod 5 is anchored in the foamed light soil, and the other end is anchored in the slope soil. The length, quantity and arrangement mode of the anchor rod 5 can be reasonably set according to the geological conditions, slope gradient and slope soil anchoring properties of the actual project area.

[0031] In this embodiment, as Figure 2 and Figure 3 shown, the outer cross-section of the cylinder 1 is square (or can also be rectangular). The square structure enables the adjacent two cylinders 1 to be attached to each other through the adjacent side surfaces, improves the internal compactness of the overall structure, and optimizes the stress performance. During the prefabrication process, through holes 11 corresponding in position are reserved on each side wall of the cylinder 1. The adjacent two cylinders 1 are connected by a connecting device 12 passing through the through holes 11, and concrete is poured and consolidated in the gap to realize the stable connection of each cylinder 1.

[0032] In this embodiment, the connecting device 12 includes a bolt 121, a nut 122 and a gasket 123. The bolt 121 passes through the through holes 11 provided on the side walls of the adjacent two cylinders 1, and its tail end is fastened by the nut 122. This connection method makes the connecting device 12 completely located inside the cylinder 1, avoiding problems such as occupying the external space and increasing the distance between the cylinders 1. And gaskets 123 are provided between the nut 122 and the inner wall of the cylinder 1 and between the head of the bolt 121 and the inner wall of the cylinder 1 to protect the structure of the cylinder 1 from being damaged.

[0033] In this embodiment, since the solidified foamed lightweight soil structure has a certain self-stabilizing ability, the top of the cylinder 1 in the retaining part 3 adjacent to the supporting part 2 is 5 - 10 m lower than the top of the supporting part 2, specifically depending on the slope gradient, the overlying load on the supporting part 2, and the density of the foamed lightweight soil. In the case of a smaller slope gradient, a smaller overlying load on the supporting part 2, and a larger density of the foamed lightweight soil, a larger height difference can be selected. Such a setting can reduce the slope range and building floor area, shorten the construction period, and reduce the construction cost while ensuring the stability of the overall structure. A protective wall 6 made of aerated concrete blocks is provided on the free surface above the side of the supporting part 2 in contact with the cylinder 1. The blocks are laid and built with the foamed lightweight soil as it is poured. The protective wall 6 plays a role in protecting the foamed lightweight soil and preventing it from being exposed to weathering during the service period.

[0034] In this embodiment, the height difference between the tops of each row of cylinders 1 in the retaining part 3 is 1.2 - 1.7 times the cross-sectional width of the cylinder 1, specifically depending on the height of the supporting structure, the overlying load on the supporting part 2, and the available building area of the retaining part 3. In the case of a smaller height of the supporting part 2 structure, a smaller overlying load on the supporting part 2, and a smaller available building area of the retaining part 3, a larger height difference within this range can be selected. Such a setting can save building materials, reduce the building land area, and shorten the construction period while ensuring the stability of the overall structure.

[0035] In this embodiment, the wall thickness of the cylinder 1 is 0.10 - 0.13 times the cross-sectional width of the cylinder 1. This thickness effectively reduces the self-weight of the cylinder 1 while ensuring the structural strength of the cylinder 1. The length of the cylinder 1 can be selected as 10 m - 40 m according to needs, and the cross-sectional width of the cylinder 1 is 0.8 - 1.2 m, thus achieving an optimal setting.

[0036] For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A foam lightweight soil - silo combined structure for constructing a high - field platform, characterized in that, It includes a support part (2) arranged on the upper side of the slope and a retaining part (3) arranged on the lower side of the slope. The support part (2) is cast with foamed light soil. The support part (2) is retained by the retaining part (3). The retaining part (3) includes a cylinder body (1) connected to each other. The lower end of the cylinder body (1) is connected to the base of the slope. The cross-section of the cylinder body (1) is rectangular. Through holes (11) for connecting a connecting device (12) are arranged on the side wall of the cylinder body. The connecting device (12) includes a bolt (121), a nut (122) and a gasket (123). The bolt (121) passes through the through holes (11) of two adjacent cylinder bodies (1). The tail end of the bolt (121) is fastened by the nut (122). And the gasket (123) is arranged between the nut (122) and the inner wall of the cylinder body (1) and between the head of the bolt (121) and the inner wall of the cylinder body (1). It further includes a plurality of anchor rods (5). One end of the anchor rod (5) is anchored in the foamed light soil and the other end is anchored in the soil body of the slope. The hollow part of the cylinder body (1) is filled with a weight filling material (4). The wall thickness of the cylinder body (1) is 0.10 - 0.13 times the cross-sectional width of the cylinder body (1). In the descending direction of the slope, the top height of the cylinder body (1) gradually decreases, and the height difference between the tops of adjacent cylinder bodies (1) is 1.2 - 1.7 times the cross-sectional width of the cylinder body (1).

2. The foam lightweight soil - silo combined structure for constructing a high - field platform according to claim 1, characterized in that, The top surface of the support part (2) is set as a plane for creating a large-area field flat and supporting the overlying load. A multi-level step (21) is arranged at the interface between the bottom of the support part (2) and the slope. The height of any one of the steps (21) is 0.5m - 1.0m, and the width is not less than 1.0m.

3. The foam lightweight soil - silo combined structure for constructing a high - field platform according to claim 1, characterized in that, The height of the support part (2) is 20 - 50m.

4. The foam lightweight soil - silo composite structure for constructing a high - field platform according to claim 1, wherein, The cross-sectional width of the cylinder body (1) is 0.8 - 1.2m.

5. The foam lightweight soil - silo composite structure for constructing a high - field platform according to claim 1, wherein, The top of the cylinder body (1) close to the support part (2) is 5 - 15m lower than the top of the support part (2). A protective wall (6) formed by aerated concrete blocks is arranged on the free face above the side of the support part (2) in contact with the cylinder body (1).

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