High-stability ground structure and construction method thereof

Abstract

The invention relates to a high-stability ground structure and a construction method thereof, and relates to the technical field of constructional engineering.The high-stability ground structure comprises a base layer treatment layer, a composite stable layer and a surface layer which are sequentially arranged from bottom to top, the base layer treatment layer comprises a compacted foundation soil body, a geogrid layer and a broken stone hardcore, and the composite stable layer comprises a supporting net rack; expansive concrete is poured into the supporting net rack, embedded foundation bolts used for connecting the supporting net rack with the base layer processing layer are arranged between the supporting net rack and the base layer processing layer, the surface layer comprises carborundum aggregate and fiber concrete, and a steel wire mesh is embedded in the surface layer. And the steel wire mesh is connected with the steel bar truss at the top in the composite stable layer through welding. The method has the effect of improving the stress diffusion capacity of the ground system.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of building engineering, in particular to a high-stability ground structure and a construction method thereof. BACKGROUND

[0002] In building engineering, the stability of the ground structure directly affects the service life and safety of the building. Traditional ground structures are mostly formed by pouring concrete or laying prefabricated boards. Although these methods are mature, they are susceptible to environmental factors such as temperature changes and humidity fluctuations during construction, which may cause cracks and settlement in the ground. In recent years, with the advancement of building technology, some new ground structures have been gradually adopted, such as reinforced concrete and self-leveling mortar. However, these technologies still have the disadvantages of high cost and complex construction.

[0003] Common ground structure construction methods include: ordinary concrete pouring method: forming the ground by pouring concrete on site, which has the advantages of low cost and simple construction, but the disadvantages of easy cracking and poor durability; prefabricated board laying method: using factory-prepared concrete boards for on-site assembly, which has the advantage of fast construction speed, but the disadvantage of poor joint water permeability and poor overall performance; reinforced concrete method: adding steel bars or fiber materials to concrete to improve strength, which has the advantage of good crack resistance, but the disadvantage of complex construction and high cost; self-leveling mortar method: using self-leveling mortar to fill the ground, which has the advantage of high surface flatness, but the disadvantage of high material cost and strict requirements for the base layer. The existing ground structure construction methods generally have the following problems: the construction process is susceptible to environmental factors, which may cause cracks or settlement in the ground; the construction period is long and the efficiency is low; the material cost is high and the economy is poor; the maintenance is difficult in the later period and the service life is short. SUMMARY

[0004] In order to improve the stress diffusion capacity of the ground system, the application provides a high-stability ground structure and a construction method thereof.

[0005] First aspect The high-stability ground structure provided by the application adopts the following technical scheme: A high-stability ground structure, comprising a base treatment layer, a composite stabilization layer and a surface layer arranged in sequence from bottom to top, the base treatment layer comprising a rammed foundation soil body, a geogrid layer and a gravel cushion layer, the composite stabilization layer comprising a support net rack, the support net rack being filled with expanded concrete, a pre-buried foundation bolt being arranged between the support net rack and the base treatment layer for connecting the two, the surface layer comprising corundum aggregate and fiber concrete, a steel mesh sheet being embedded in the surface layer, the steel mesh sheet being connected to a steel bar truss at the top of the composite stabilization layer through welding.

[0006] By adopting the technical scheme, the in-situ foundation soil body can improve the bearing capacity and stability of the foundation, the geogrid and the gravel cushion can further enhance the strength and stability of the base layer, the support net rack is filled with expanded concrete to form an integral stress skeleton, the bearing capacity and anti-deformation capacity of the composite stabilization layer are improved, the embedded foundation bolts firmly connect the support net rack and the base treatment layer, the corundum aggregate and the fiber concrete enhance the wear resistance and impact resistance of the surface layer, the steel mesh is welded with the steel bar truss at the top of the composite stabilization layer to tightly combine the surface layer and the composite stabilization layer, the stability and durability of the overall ground structure are improved, and multi-stage dispersion transmission of load stress is realized.

[0007] Optionally, the geogrid is bidirectionally staggered.

[0008] By adopting the technical scheme, the bidirectionally staggered geogrid can further enhance the stability and bearing capacity of the base treatment layer, and reduce the lateral displacement and uneven settlement of the soil body.

[0009] Optionally, the support net rack comprises a steel bar truss net and a vertical support short rod for connecting upper and lower steel bar trusses in the steel bar truss net.

[0010] By adopting the technical scheme, the vertical support short rod connects the upper and lower steel bar trusses, the overall structural strength of the support net rack is enhanced, the expanded concrete forms an integral stress skeleton after being filled, the stability of the composite stabilization layer is further improved, the corundum aggregate and the fiber concrete of the surface layer improve the wear resistance, and the embedded steel mesh is connected with the steel bar truss at the top of the composite stabilization layer through welding, so that the integrity and anti-cracking performance of the ground structure are improved.

[0011] Optionally, the support net rack is a spatial triangular truss, and the spatial triangular truss comprises inclined main support rods, horizontal connecting rods and node connecting sleeves.

[0012] By adopting the technical scheme, the stability of the ground structure can be improved, and the spatial triangular truss can enhance the support capacity and overall structural strength of the composite stabilization layer.

[0013] Optionally, the spatial triangular truss comprises a bottom rack and a top rack, a plurality of groups of support rods are arranged between the bottom rack and the top rack, the plurality of groups of support rods are arranged along the length direction of the bottom rack, each group of support rods comprises first support rods, second support rods arranged in cross and a limiting assembly for limiting rotation of the first support rods and the second support rods, and the end of the first support rod or the second support rod abuts against the top rack or the bottom rack.

[0014] By adopting the technical scheme, the end of the first support rod or the second support rod abuts against the top rack or the bottom rack, and the structural strength and stability of the composite stabilization layer are further enhanced, so that the stability of the overall ground structure is improved.

[0015] Optionally, the limiting assembly comprises locking plates fixedly connected on both sides of the first supporting rod, the second supporting rod is rotationally connected with a locking disc, a plurality of through holes are formed in the locking disc, a limiting hole is formed in the locking plate, a locking screw is arranged in the through hole and the limiting hole, and a locking nut is threadedly connected with the locking screw.

[0016] By adopting the above technical scheme, the locking disc is rotationally connected with the second supporting rod, the locking screw passes through the through hole of the locking disc and the limiting hole of the locking plate, and the locking nut is threadedly connected, so that the rotation of the first supporting rod and the second supporting rod can be effectively limited, the stability of the space triangular truss is enhanced, and the overall stability of the ground structure is improved.

[0017] Optionally, an insertion hole is formed in the first supporting rod, the insertion hole is arranged along the length direction of the first supporting rod, and the second supporting rod passes through the insertion hole.

[0018] By adopting the above technical scheme, the connection stability of the first supporting rod and the second supporting rod can be improved.

[0019] Second aspect A construction method of a high-stability ground structure, which utilizes the high-stability ground structure, comprises the following steps: S1, during construction, the ground soil is subjected to layered compaction, the geogrid is laid, and the graded gravel is paved to form a gravel cushion; S2, the lower layer of steel truss is assembled and anchored, the vertical support short rod is installed, and then the upper layer of steel truss is erected to form a steel truss net; S3, the micro-expanding concrete is poured to form an overall stress skeleton; S4, during the construction of the surface layer, the steel mesh sheet is welded on the top of the upper layer of steel truss, and then the fiber-reinforced concrete is poured.

[0020] By adopting the above technical scheme, the layered compaction of the ground soil, the laying of the geogrid and the gravel cushion can improve the stability and bearing capacity of the base treatment layer; the assembly of the lower layer of steel truss and the anchoring, the installation of the vertical support short rod, and then the erection of the upper layer of steel truss to form the steel truss net, and the pouring of the micro-expanding concrete to form the overall stress skeleton can enhance the strength and stability of the composite stable layer; during the construction of the surface layer, the steel mesh sheet is welded first and then the fiber-reinforced concrete is poured, which can improve the wear resistance and crack resistance of the surface layer, and finally the entire ground structure has high stability.

[0021] In summary, the present application has at least one of the following beneficial technical effects: 1. The base treatment layer adopts the compacted ground soil, the geogrid layer and the gravel cushion, which can effectively increase the soil density, buffer and disperse the load, and cope with complex geological conditions and large load changes; 2. The support net frame in the composite stable layer supports the inner perfusion of the expanded concrete to form an integral stress skeleton, and is connected with the base treatment layer through the embedded foundation bolts, which can enhance the overall stability of the ground structure; 3. The surface layer is provided with diamond aggregate and fiber concrete, and the embedded steel mesh is welded with the steel bar truss at the top of the composite stable layer, which can reduce ground cracks and settlement, and improve the stability and durability of the ground. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of embodiment 1 of the present application; Figure 2 is a schematic diagram of the structure of the hidden rammed soil foundation of embodiment 1 of the present application; Figure 3 is a schematic diagram of the structure of the steel mesh of embodiment 1 of the present application; Figure 4 is a schematic diagram of the overall structure of embodiment 2 of the present application; Figure 5 is a schematic diagram of the structure of the support net frame of embodiment 2 of the present application; Figure 6 is a schematic diagram of the structure of the support net frame of embodiment 3 of the present application; Figure 7 is a schematic diagram of the structure of the support rod of embodiment 3 of the present application.

[0023] In the figure, 1 is a base treatment layer; 11 is a rammed soil foundation; 12 is a geogrid; 13 is a gravel cushion; 2 is a composite stable layer; 21 is a support net frame; 211 is a steel bar truss net; 212 is a sliding groove; 213 is an inclined main support rod; 214 is a horizontal connecting rod; 215 is a node connecting sleeve; 216 is a sliding block; 217 is a bottom frame; 218 is a top frame; 219 is a support rod; 2191 is a first support rod; 21911 is a insertion hole; 2192 is a second support rod; 2193 is a limiting assembly; 21931 is a locking plate; 219311 is a through hole; 21932 is a locking disc; 219321 is a limiting hole; 21933 is a locking screw; 21934 is a locking nut; 22 is expanded concrete; 3 is a surface layer; 31 is a steel mesh; 32 is diamond aggregate; 33 is fiber concrete. DETAILED DESCRIPTION

[0024] The following will be described in detail in combination with the accompanying Figure 1 - the accompanying Figure 7 , the present application will be further described in detail.

[0025] First aspect Embodiment 1 Referring to Figure 1 , Figure 2 and Figure 3The application discloses a high-stability ground structure which comprises, from bottom to top, a base treatment layer 1, a composite stabilization layer 2 and a surface layer 3.

[0026] The base treatment layer 1 comprises a rammed foundation soil body 11, a geogrid 12 layer and a gravel cushion layer 13. The rammed foundation soil body 11 is a compacted foundation soil body which is used for enhancing the bearing capacity of the foundation and reducing the settlement. The geogrid 12 layer is laid on the rammed foundation soil body 11 and is made of a high-molecular grid material. The geogrid 12 layer disperses the load through the grid structure, limits the lateral deformation of the soil body and improves the integrity of the base layer. The geogrid 12 layer is laid in a bidirectional staggered manner. The gravel cushion layer 13 is laid on the geogrid 12 layer and is formed by rolling graded gravel. The gravel cushion layer 13 plays a role of leveling, drainage and buffering and provides a flat working surface for the upper structure.

[0027] The composite stabilization layer 2 comprises a support net rack 21 which is filled with expanded concrete 22. The support net rack 21 comprises a steel bar truss net 211 and vertical support short bars which are used for connecting the upper and lower steel bar trusses in the steel bar truss net 211. The vertical support short bars and the steel bar truss net 211 are both buried in the expanded concrete 22. The expanded concrete 22 and the support net rack 21 form an integral structure which enhances the strength and integrity of the composite stabilization layer 2.

[0028] The support net rack 21 and the base treatment layer 1 are connected through embedded anchor bolts. One end of the embedded anchor bolts is fixed to the base treatment layer 1, and the other end is fixed to the support net rack 21, so that the two are stably connected and the composite stabilization layer 2 and the base treatment layer 1 are cooperatively stressed.

[0029] The surface layer 3 is composed of corundum aggregate 32 and fiber concrete 33. The corundum aggregate 32 is uniformly distributed in the fiber concrete 33, thereby improving the wear resistance and strength of the surface layer 3.

[0030] The surface layer 3 is embedded with a steel mesh 31 which is connected to the steel bar truss at the top of the composite stabilization layer 2 through welding, so that the connection stability between the surface layer 3 and the composite stabilization layer 2 is enhanced, and the two are cooperatively worked.

[0031] Embodiment 2 With reference to Figure 4 and Figure 5Different from example 1, the support net rack 21 is provided as a space triangle truss, which comprises inclined main support rods 213, horizontal connecting rods 214 and node connecting sleeves 215. The horizontal connecting rods 214 are provided as two and arranged in parallel. The node connecting sleeves 215 are fixedly connected on the horizontal connecting rods 214. The inclined main support rods 213 are arranged obliquely to the horizontal connecting rods 214 and are threadedly connected in the node connecting sleeves 215. The plurality of inclined main support rods 213 and the plurality of node connecting sleeves 215 are equidistantly arranged along the length direction of the horizontal connecting rods 214. The whole space triangle truss is embedded in the expanded concrete 22.

[0032] Example 3 Reference Figure 6 And Figure 7 Different from example 2, the space triangle truss comprises a bottom rack 217 and a top rack 218, which are arranged in parallel. A plurality of groups of support rods 219 are arranged between the bottom rack 217 and the top rack 218 and along the length direction of the bottom rack 217.

[0033] Each group of support rods 219 comprises first support rods 2191, second support rods 2192 and limiting assemblies 2193 for limiting the rotation of the first support rods 2191 and the second support rods 2192, which are arranged in cross. The first support rods 2191 are provided with insertion holes 21911 arranged along the length direction of the first support rods 2191. The second support rods 2192 pass through the insertion holes 21911, so that the first support rods 2191 and the second support rods 2192 are arranged in cross in this way. The end of the first support rods 2191 or the second support rods 2192 abuts against the top rack 218 or the bottom rack 217.

[0034] The limiting assembly 2193 comprises locking plates 21931 fixedly connected on both sides of the first support rods 2191 and arranged along the length direction of the first support rods 2191. The second support rods 2192 are rotatably connected with locking discs 21932, which are provided with a plurality of through holes 219311. In this embodiment, the through holes 219311 are provided as two. The locking plates 21931 are provided with limiting holes 219321 arranged along the length direction of the locking plates 21931. The locking discs 21932 are provided with locking screws 21933 for connecting with the through holes 219311 and the limiting holes 219321. The locking screws 21933 are threadedly connected with locking nuts 21934, which abut against the side of the locking plates 21931 away from the locking discs 21932, so as to limit the positions of the first support rods 2191 and the second support rods 2192.

[0035] Second aspect The embodiment of the application further discloses a construction method of the high-stability ground structure. S1, during construction, the ground soil is layered and compacted, the geogrid 12 is laid, the graded gravel is paved, and the gravel cushion 13 is formed; S2, the lower layer of the steel bar truss is assembled and anchored, the vertical support short bar is installed, the upper layer of the steel bar truss is erected, and the steel bar truss net 211 is formed; S3, the micro-expansion concrete 22 is poured to form an integral stress skeleton; S4, during construction of the surface layer 3, the steel wire mesh 31 is welded on the top of the upper layer of the steel bar truss, and then the fiber-reinforced concrete 33 is poured.

[0036] The embodiments of the specific embodiment are the preferred embodiments of the application, and are not intended to limit the protection scope of the application, wherein the same parts are indicated by the same reference numerals. Therefore, equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A highly stable ground structure, characterized in that, The structure includes a base treatment layer (1), a composite stabilization layer (2), and a surface layer (3) arranged sequentially from bottom to top. The base treatment layer (1) includes a compacted foundation soil (11), a geogrid (12) layer, and a crushed stone cushion layer (13). The composite stabilization layer (2) includes a support frame (21), which is filled with expansive concrete (22). Anchor bolts for connecting the support frame (21) and the base treatment layer (1) are provided. The surface layer (3) includes corundum aggregate (32) and fiber concrete (33). A wire mesh (31) is embedded in the surface layer (3). The wire mesh (31) is connected to the steel truss at the top of the composite stabilization layer (2) by welding.

2. The high-stability ground structure according to claim 1, characterized in that, The geogrid (12) is laid in a bidirectional staggered pattern.

3. The high-stability ground structure according to claim 1, characterized in that, The support grid (21) includes a steel truss grid (211) and vertical support short bars for connecting the upper and lower layers of steel trusses in the steel truss grid (211).

4. The high-stability ground structure according to claim 1, characterized in that, The supporting space frame (21) is configured as a spatial triangular truss, which includes diagonal main struts (213), horizontal connecting rods (214) and node connecting sleeves (215).

5. A highly stable ground structure according to claim 1, characterized in that, The spatial triangular truss includes a base frame (217) and a top frame (218). Multiple sets of support rods (219) are provided between the base frame (217) and the top frame (218). The multiple sets of support rods (219) are arranged along the length direction of the base frame (217). Each set of support rods (219) includes a first support rod (2191), a second support rod (2192) arranged in a cross configuration, and a limiting component (2193) for limiting the rotation of the first support rod (2191) and the second support rod (2192). The end of the first support rod (2191) or the second support rod (2192) abuts against the top frame (218) or the base frame (217).

6. A highly stable ground structure according to claim 5, characterized in that, The limiting component (2193) includes a locking plate (21931) fixedly connected to both sides of the first support rod (2191), a locking disc (21932) rotatably connected to the second support rod (2192), a plurality of through holes (219311) being provided on the locking disc (21932), a limiting hole (219321) being provided on the locking plate (21931), a locking screw (21933) for connecting with the through holes (219311) and the limiting hole (219321) being threaded onto the locking disc (21932), and a locking nut (21934) being threaded onto the locking screw (21933).

7. A highly stable ground structure according to claim 6, characterized in that, The first support rod (2191) has a socket (21911) which is arranged along the length of the first support rod (2191), and the second support rod (2192) passes through the socket (21911).

8. A construction method for a highly stable ground structure, characterized in that, The method of using a highly stable ground structure as described in claim 1 includes the following steps: S1. During construction, the foundation soil is first compacted in layers, and then geogrid (12) is laid and graded crushed stone is laid to form a crushed stone cushion layer (13). S2. Assemble and anchor the lower steel truss, install the vertical support short bars, and then erect the upper steel truss to form a steel truss network (211). S3, pour micro-expansion concrete (22) to form an integral load-bearing skeleton; S4. When constructing the surface layer (3), first weld the wire mesh (31) on the top of the upper steel truss, and then pour the fiber-reinforced concrete (33).

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