CN113266021A

CN113266021A - Foam light soil-bin barrel combined structure for building high-level ground

Info

Publication number: CN113266021A
Application number: CN202110552315.7A
Authority: CN
Inventors: 赵炼恒; 左仕; 刘乐; 曾中林; 胡世红; 吕国顺; 赵彪; 黄栋梁; 戴全; 赵伟龙
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-08-17
Anticipated expiration: 2041-05-20

Abstract

The invention discloses a foam lightweight soil-silo composite structure for building a high field flat, comprising a support part arranged on the upper side of the side slope and a guard part arranged on the lower side of the side slope. It is made of high-quality soil, and the supporting part is protected by a shielding part, the shielding part includes a cylinder body connected to each other, and the lower end of the cylinder body is connected to the base of the side slope. The foam lightweight soil-silo composite structure of the present invention is a combination of a silo structure and a foam lightweight soil structure, and has good overall stability. The use of this lightweight structure can greatly reduce the amount of filling and the footprint. area, shorten the construction period, and reduce the project cost. The use of this structure can ensure the long-term safety and reliability of infrastructure functions in difficult and dangerous mountainous areas, and meet the actual needs of my country's transportation construction to continue to develop in difficult and dangerous mountainous areas in the west, which can produce huge economic and social benefits.

Description

Foam light soil-bin barrel combined structure for building high-level ground

Technical Field

The invention belongs to the technical field of constructional engineering, and particularly relates to a foam light soil-bin combined structure for building a high-level ground.

Background

With the rapid development of national economy and the implementation of western major development strategies, more and more railways, highway service areas, municipal ground-building yards, airport yards and other large-area yards are built in the middle and western severe mountain areas. The natural environment of the hard mountain area is severe, the terrain is rugged and severe, the geological structure is complex, and the construction of the large-area high-fill terrace is restricted by factors such as the space geometric shape of the terrace, the size of the terrace, the stratum property of the terrace and the like. Therefore, how to construct a high-fill large-area terrace under the multi-dimensional limited condition in a difficult mountain area becomes a difficult problem to be solved urgently.

The traditional high fill engineering usually adopts layered filling and layered compaction modes for filling, and has the characteristics of large filling amount, large floor area, large construction difficulty, high engineering cost and the like. Because the compaction degree of the filling material is difficult to ensure in the construction process, the problems of instability, uneven settlement and the like often occur in the later use process, and simultaneously, the excessively high filling body also puts high requirements on the bearing capacity of the substrate. If the slope releasing amount of the filling body is reduced to reduce the filling amount and the occupied area, the filling body needs to be blocked and protected by using a supporting structure. Traditional fender structure is owing to the size is limited, should not be used for keeping off high fill, sets up too high fender structure and can't guarantee structure itself and the stability of high fill. There is therefore a need for a new structure that can be used to build high fill large area terraces under complex terrain conditions.

Disclosure of Invention

The invention aims to provide a foam light soil-bin combination structure and a method for constructing a high-level ground, so that the problems of constructing the high-filling large-area ground under the condition of complex terrain and filling and land making when the land of a side slope is limited are mainly solved.

In order to achieve the purpose, the invention discloses a foam lightweight soil-bin combination structure for building a high-level terrace, which comprises a supporting part and a blocking and protecting part, wherein the supporting part is arranged on the upper side of a side slope, the blocking and protecting part is arranged on the lower side of the side slope, the supporting part is formed by pouring foam lightweight soil, the supporting part is blocked and protected by the blocking and protecting part, the blocking and protecting part comprises mutually connected barrel bodies, and the lower ends of the barrel bodies are connected to the base of the side slope.

Furthermore, the top surface of the supporting part is a plane for constructing a large-area terrace and supporting an overlying load, a multi-stage step is arranged on an interface between the bottom of the supporting part and the side slope, the height of any step is 0.5-1.0 m, and the width of any step is not less than 1.0 m.

Furthermore, the soil slope anchoring device further comprises a plurality of anchor rods, wherein one ends of the anchor rods are anchored in the foam light soil, and the other ends of the anchor rods are anchored in the soil body of the side slope.

Furthermore, the cross-section of barrel is rectangle or square, be provided with the through-hole that is used for connecting device to connect on the lateral wall of barrel.

Further, the connecting device comprises a bolt, a nut and a gasket, the bolt is arranged in the through holes of the two adjacent cylinders in a penetrating mode, the tail end of the bolt is fastened through the nut, and the gasket is arranged between the nut and the inner walls of the cylinders and between the head of the bolt and the inner walls of the cylinders.

Further, the height of the supporting part is 20-50 m.

Furthermore, the hollow part of the cylinder is filled with a weight packing.

Further, the cross-sectional width of barrel is 0.8 ~ 1.2m, the wall thickness of barrel is 0.10 ~ 0.13 times of the cross-sectional width of barrel.

Furthermore, the height of the top of the cylinder is gradually reduced in the descending direction of the side slope, and the height difference of the tops of the adjacent cylinders is 1.2-1.7 times of the width of the cross section of the cylinder.

Furthermore, the top of the cylinder body close to the supporting part is 5-15 m lower than the top of the supporting part, and a protective wall formed by aerated concrete blocks is arranged on the empty surface above one side of the supporting part, which is in contact with the cylinder body.

Compared with the prior art, the invention has the advantages that:

the foam light soil-bin combined structure takes the bin type structure as a blocking part and takes the foam light soil structure as a supporting part, and is mainly used for constructing large-area yards such as railways, expressway service areas, municipal ground building yards, airport yards and the like under the condition of limited land use or complex terrains. The foamed light soil has the characteristics of light weight, compression resistance, good durability and the like. The foam light soil is used as a filling material, can be used for cast-in-place construction, has high construction speed, has good integrity after being solidified, and can be tightly combined with an anchor rod and a bin-type blocking and protecting part. The porous property of the foam light soil enables the foam light soil to have good shock absorption performance, and impact load caused by trains, automobiles and the like can be well absorbed and dispersed. Because the density of the foam light soil is far less than that of the soil body, the filling material can greatly reduce the strength requirement on the substrate, effectively avoid the problems of overlarge substrate stress and larger substrate foundation deformation, and greatly reduce the acting force of the filling material on the retaining structure. In addition, the foamed light soil belongs to a neutral inorganic material, and the used foaming agent does not contain harmful substances, so that the environmental pollution can be avoided.

The invention has height limitation by using the foam light soil for vertical filling, so that a bin type retaining structure is adopted for retaining and protecting a filling body for high filling. Compared with the traditional supporting and blocking structure, the bin type structure is not limited by the structure height and has excellent stress deformation characteristics. The storehouse cylinder structure plays the fender effect of protecting to the filling, can effectively reduce the filling body and put the slope scope, strengthens the stability of filling, makes the filling height of foam light soil obtain promoting. In addition, the anchor rod is arranged to further enhance the stability of the supporting structure, one end of the anchor rod is anchored in the foam light soil, the other end of the anchor rod is anchored in the soil body of the side slope, a part of load borne by the supporting part can be transmitted to the surrounding stable soil body through the anchor rod, meanwhile, the integrity of the supporting part and the side slope is enhanced, and the possibility of the supporting part sliding down, overturning and damaging along the slope surface is reduced.

The foam light soil-bin combination structure of the invention combines the bin type structure and the foam light soil structure, has good overall stability, and can greatly reduce the filling amount, reduce the occupied area, shorten the construction period and reduce the construction cost by adopting the light structure. The structure can ensure the long-term safety and reliability of infrastructure functions in the hard mountainous area, meet the actual requirements of the transportation construction of China on continuously deepening the development of the western hard mountainous area, and can generate great economic and social benefits.

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

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of a foam lightweight soil-silo combination structure for constructing high-rise terraces according to the preferred embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of the barrel in the combined structure of the foam lightweight soil and the barrel for constructing the high-level ground according to the preferred embodiment of the present invention;

fig. 3 is a schematic view of the connection structure of the barrel in the foam lightweight soil-barrel combination structure for constructing a high-level ground according to the preferred embodiment of the present invention.

Illustration of the drawings:

1. a barrel; 11. a through hole; 12. a connecting device; 121. a bolt; 122. a nut; 123. a gasket; 2. a support portion; 21. a step; 3. a guard portion; 4. weighting and filling; 5. an anchor rod; 6. protecting the wall.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in FIGS. 1 to 3, the present invention discloses a foamed lightweight soil-bin combination structure for constructing a high-rise terrace, which comprises a supporting part 2 made of foamed lightweight soil and a shielding part 3 made of a bin type structure. The supporting part 2 is formed by pouring foam light soil, the top surface is a plane and is used for constructing a large-area terrace and supporting an overlying load, and structural facilities such as railway stations, expressway service areas, municipal ground-building terraces, airport terraces and the like can be built on the terrace. The bottom of the supporting part 2 and the boundary surface of the side slope are provided with a plurality of steps 21, the height of the steps 21 is 0.5-1.0 m, the width is not less than 1.0m, the specific value of the step size in the actual engineering depends on the slope and the terrain condition, the supporting part 2 is blocked by the steps 21, and therefore the anti-sliding capacity of the supporting part 2 is enhanced. Anchor rods 5 are required to be arranged in partial areas of the supporting portion 2 to enhance the stability of the supporting portion 2, the anchor rods 5 can enhance the integrity of the supporting portion 2 and a slope, and the possibility of the supporting portion 2 falling down and overturning along the slope is reduced. In the arrangement mode, the light foam light soil is adopted to replace the common filling material, so that the dead weight of the filling part is greatly reduced, and the later settlement condition is effectively relieved; compared with the traditional filling type filling structure, the foam light soil has the advantages of strong compression resistance, good durability, good integrity and stronger stability; meanwhile, the porous property of the foamed light soil enables the foamed light soil to have good shock absorption, can well absorb and disperse impact load caused by trains, automobiles and the like, and has better stress performance; in addition, the foam light soil can be used for cast-in-place construction, the construction speed is high, and the construction period can be effectively shortened.

The blocking and protecting part 3 is composed of a plurality of prefabricated cylinder bodies 1, the cylinder bodies 1 are connected to the base of the side slope along the vertical direction, the cylinder bodies 1 are closely and adjacently arranged, and the cylinder bodies 1 are arranged in a step shape with the tops gradually decreasing from one end close to the supporting part 2 to the other end in the descending direction of the side slope. For traditional fender structure, the cascaded structure of arranging of barrel 1 is adopted to bin formula structure, does not receive the structural height restriction, has outstanding atress deformation characteristic. The storehouse cylinder structure plays the fender effect of protecting to the filling, can effectively reduce the filling body and put the slope scope, strengthens the stability of filling, makes the filling height of foam light soil obtain promoting. In the present embodiment, the guard portion 3 may be provided at any sidewall of the support portion 2 that needs to be protected, in a specific position of the field plateau.

The barrel 1 is simple and convenient in structure and easy to manufacture, the prefabricated barrel 1 can effectively shorten the field construction period, and compared with a traditional supporting and blocking structure, the single structure is light, so that the requirement on a construction device is reduced, and the construction difficulty and the construction cost are further reduced. In this embodiment, the hollow part of each barrel 1 is filled with the ballast filler 4, and the ballast filler 4 not only increases the structural dead weight of the barrel 1 and improves the anti-slip and anti-overturning capacity of the structure, but also fills the hollow part, optimizes the stress deformation characteristic and stability of the barrel 1, improves the shearing resistance of the barrel 1 with a longer length, enables the bearing capacity characteristic to meet the actual requirement of engineering, and can be used for supporting and blocking the supporting part 2 under the multi-dimensional limited condition.

In this embodiment, one end of the anchor rod 5 is anchored in the foamed lightweight soil, and the other end is anchored in the side slope soil, and the length, the number, and the arrangement mode of the anchor rod 5 can be set reasonably according to the geological conditions, the slope gradient, and the anchoring properties of the side slope soil in the area where the actual engineering is located.

In this embodiment, as shown in fig. 2 and 3, the cross section of the outer shape of the cylinder 1 is square (or rectangular optionally), and the square structure enables two adjacent cylinders 1 to be attached to each other through adjacent side faces, so that the internal compactness of the whole structure is improved, and the stress performance is optimized. In the prefabricating process, through holes 11 corresponding to the positions are reserved on the side walls of the cylinder bodies 1, the two adjacent cylinder bodies 1 are connected through connecting devices 12 penetrating through the through holes 11, concrete is poured into the gaps for solidification, and stable connection of the cylinder bodies 1 is achieved.

In this embodiment, connecting device 12 includes bolt 121, nut 122 and gasket 123, and bolt 121 wears to locate in the through-hole 11 that sets up on the lateral wall of two adjacent barrels 1, and its tail end passes through the nut 122 fastening, and this kind of connected mode makes connecting device 12 be located the inside of barrel 1 completely, avoids taking outer space, leads to barrel 1 interval increase scheduling problem. And gaskets 123 are respectively arranged 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 in a cushioning manner, so that the structure of the cylinder 1 is protected from being damaged.

In this embodiment, because the solidified foam lightweight soil structure has a certain self-stabilization capability, the top of the cylinder 1 adjacent to the support portion 2 in the retaining portion 3 is 5-10 m lower than the top of the support portion 2, which depends on the slope gradient, the load on the support portion 2, and the density of the foam lightweight soil. The slope is less, the load that covers on bearing part 2 is less, foam light soil density is great under the circumstances can choose for use great difference in height, sets up like this and can reduce the scope of putting the slope and building area, reduction of erection time, reduction of construction cost under the circumstances of guaranteeing overall structure stability. The face above the side of the supporting part 2, which is in contact with the cylinder 1, is provided with a protective wall 6 formed by aerated concrete blocks, the blocks and the foamed lightweight soil are poured and built at any time, and the protective wall 6 plays a role in protecting the foamed lightweight soil and avoiding exposure and weathering during the service life.

In this embodiment, the difference between the heights of the tops of the rows of the cylinders 1 in the shielding part 3 is 1.2 to 1.7 times the width of the cross section of the cylinder 1, which depends on the height of the supporting structure, the size of the load on the supporting part 2, and the size of the available building area of the shielding part 3. The height difference value within the range can be selected under the conditions that the height of the supporting part 2 structure is small, the covering load of the supporting part 2 is small, and the available building area of the blocking and protecting part 3 is small, so that the building material can be saved, the building land area can be reduced, and the construction period can be shortened under the condition that the stability of the whole structure is ensured.

In this embodiment, the wall thickness of barrel 1 is 0.10 ~ 0.13 times of the cross-sectional width of barrel 1, and this thickness effectively alleviates barrel 1 dead weight under the prerequisite of guaranteeing barrel 1 structural strength. The length of the cylinder body 1 can be selected from 10m to 40m according to needs, and the section width of the cylinder body 1 is 0.8 to 1.2m, so that the optimal setting is realized.

Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a foam light soil-silo section of thick bamboo integrated configuration for building high terrace, its characterized in that, including setting up in bearing (2) of side slope upside and setting up fender portion (3) in the side slope downside, bearing (2) are pour by foam light soil and are formed, bearing (2) are passed through fender portion (3) keep off and protect, keep off and protect portion (3) including interconnect's barrel (1), the lower extreme of barrel (1) connect in the basement of side slope.

2. The foam light soil-silo combination structure for constructing high-level ground as claimed in claim 1, wherein the top surface of the supporting part (2) is configured as a plane for constructing large-area ground and supporting an overlying load, the interface of the bottom of the supporting part (2) and the side slope is provided with a plurality of steps (21), and the height of any step (21) is 0.5m to 1.0m, and the width is not less than 1.0 m.

3. The foam lightweight soil-silo combination structure for constructing high-level ground of claim 1 is characterized in that it further comprises a plurality of anchor rods (5), one end of the anchor rods (5) is anchored in the foam lightweight soil and the other end is anchored in the soil body of the side slope.

4. The foam lightweight soil-silo combination structure for constructing high-level ground of any one of claims 1 to 3 wherein the cross-section of the barrel (1) is rectangular or square and the side wall of the barrel is provided with through holes (11) for connection of the connecting means (12).

5. The foam light soil-bin combination structure for building high-level ground as claimed in claim 4, wherein the connecting means (12) comprises a bolt (121), a nut (122) and a gasket (123), the bolt (121) is inserted into the through hole (11) of two adjacent bins (1), the tail end of the bolt (121) is fastened by the nut (122), and the gasket (123) is cushioned between the nut (122) and the inner wall of the bin (1) and between the head of the bolt (121) and the inner wall of the bin (1).

6. The foam lightweight soil-silo combination structure for constructing a high-rise terrace according to claim 1, wherein the height of the support (2) is 20 to 50 m.

7. The foam lightweight soil-silo combination structure for constructing high-level ground as claimed in claim 4, wherein the hollow part of the barrel (1) is filled with ballast filler (4).

8. The foam lightweight soil-silo combination structure for constructing a high-level ground of claim 4 is characterized in that the cross-sectional width of the barrel (1) is 0.8-1.2 m, and the wall thickness of the barrel (1) is 0.10-0.13 times the cross-sectional width of the barrel (1).

9. The foam lightweight soil-silo combination structure for constructing a high-level ground as claimed in claim 4, wherein the top height of the barrel (1) is gradually reduced in the descending direction of the slope, and the difference between the top heights of the adjacent barrels (1) is 1.2-1.7 times the cross-sectional width of the barrel (1).

10. The foam lightweight soil-silo combination structure for constructing high-level ground of claim 4 is characterized in that the top of the silo body (1) close to the supporting part (2) is 5-15 m lower than the top of the supporting part (2), and the empty surface above the side of the supporting part (2) contacting with the silo body (1) is provided with a protective wall (6) formed by aerated concrete blocks.