Grid type replacement filling foundation structure

Abstract

The utility model relates to a grid type replacement filling foundation structure which comprises a grid foundation, a plurality of transverse foundations and a plurality of longitudinal foundations, the longitudinal foundations are arranged in the direction from a high filling area to a low filling area, the transverse foundations are connected with the longitudinal foundations, and the bottoms of the transverse foundations and the bottoms of the longitudinal foundations are embedded into bed rock; the peripheral foundation surrounds the grid foundation, the two ends of the transverse foundation and the two ends of the longitudinal foundation are connected with the peripheral foundation, the bottom of the peripheral foundation is embedded into bed rock, and backfill earthwork is not arranged in the transverse foundation and longitudinal foundation area on the inner side of the peripheral foundation; and the multiple shear-resistant keys are arranged at the top of the side, close to the high fill area, of the peripheral foundation, the shear-resistant keys are locally embedded in the peripheral foundation, and the multiple shear-resistant keys are distributed at intervals in the direction perpendicular to the length of the longitudinal foundation. According to the foundation structure, the structure can be supported in the vertical direction, meanwhile, the soil body side pressure caused by asymmetric backfilling can be resisted in the horizontal direction, the bearing capacity of the structure can be improved, and the borrowing earth volume can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of foundation treatment technology, in particular to a grid-type replacement foundation structure. Background Art

[0002] In mountainous cities such as Sichuan and Chongqing, the topography is relatively complex. The water supply and drainage structures in municipal engineering are affected by the elevation of the process flow. Their bottom plate elevation is often higher than the existing ground elevation and needs to be filled to the specified elevation.

[0003] Pile foundation or large-area replacement backfill is often used for foundation treatment of symmetrical backfill. However, due to site limitations, there is often an asymmetrical backfill situation where one side of the structure has high backfill and the other side has low backfill. When pile foundation is used for asymmetrical backfill, the pile foundation bears the lateral thrust caused by the asymmetrical backfill, which is not conducive to its stress. In addition, the pile foundation is expensive, and the site requirements for machinery entry are high. The use of large-area replacement backfill leads to problems such as inconvenience in transportation and construction in mountainous areas. Utility Model Content

[0004] Based on the above description, the utility model provides a grid-type replacement foundation structure to solve the problem that when asymmetric backfill is performed using a pile foundation, the pile foundation is subjected to the lateral thrust caused by the asymmetric backfill, which is not conducive to its stress bearing, and the pile foundation is expensive, and the machinery entry has high requirements on the site. The use of large-area replacement backfill leads to the problem of inconvenience in transportation and construction in mountainous areas.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] The present application provides a grid-type replacement foundation structure, and the technical solution adopted is as follows:

[0007] A grid-type replacement foundation structure, comprising:

[0008] A grid foundation, comprising a plurality of transverse foundations and a plurality of longitudinal foundations, wherein the longitudinal foundations are arranged in a direction from a high fill area to a low fill area, and the plurality of longitudinal foundations are spaced apart in a direction perpendicular to their lengths, and the transverse foundations are arranged in a direction perpendicular to the lengths of the longitudinal foundations, and the transverse foundations connect the plurality of longitudinal foundations, and the plurality of transverse foundations are spaced apart in a direction of the lengths of the longitudinal foundations, and the bottoms of the transverse foundations and the longitudinal foundations are embedded in bedrock;

[0009] A peripheral foundation is arranged around the grid foundation, both ends of the transverse foundation and both ends of the longitudinal foundation are connected to the peripheral foundation, the bottom of the peripheral foundation is embedded in the bedrock, and the inner side of the peripheral foundation where the transverse foundation and the longitudinal foundation are not arranged is backfilled with earth;

[0010] A plurality of shear bars are arranged at the top of one side of the outer foundation close to the high fill area. The shear bars are partially buried in the outer foundation and used to connect with the structure. The plurality of shear bars are spaced apart in a direction perpendicular to the longitudinal foundation length.

[0011] Preferably, the top elevations of the grid foundation and the peripheral foundation are the same as the bottom elevation of the structure floor.

[0012] Preferably, the bottoms of the transverse foundation, the longitudinal foundation and the peripheral foundation are embedded in the bedrock to a depth of 0.5m-1m.

[0013] Preferably, the grid foundation and the peripheral foundation are cast in one piece.

[0014] Preferably, the shear bars are reinforced concrete shear bars.

[0015] Preferably, the grid foundation and the peripheral foundation are rubble concrete foundations.

[0016] Preferably, the width of the peripheral foundation is greater than the width of the transverse foundation and the longitudinal foundation.

[0017] Preferably, the peripheral foundation is arranged along a direction perpendicular to the longitudinal foundation length close to one side of the high fill area, and the width of the peripheral foundation on this side is greater than the width of other areas.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0019] 1. This application sets a grid foundation and a peripheral foundation. The grid foundation is a grid-shaped structure foundation formed by connecting multiple longitudinal foundations and multiple transverse foundations. The transverse foundation is between the high fill area and the low fill area to bear the earth side pressure from the high fill area to the low fill area, and the longitudinal foundation is set along the direction from the high fill area to the low fill area and connected to the transverse foundation to support the transverse foundation, thereby improving the strength of the transverse foundation to improve the bearing capacity. The peripheral foundation is connected to the longitudinal foundation and the transverse foundation outside the grid foundation to connect the entire foundation to form a whole, thereby further improving the bearing capacity of the foundation. The bottom of the grid foundation is embedded in the bedrock to transfer the vertical load of the upper structure to the bedrock. The entire foundation structure supports the structure in the vertical direction and resists the lateral pressure of the soil caused by asymmetric backfill in the horizontal direction. The backfill earthwork in the area where no transverse foundation and longitudinal foundation are set on the inner side of the peripheral foundation can be backfilled with the surface soil excavated in the early stage, which reduces the amount of borrowed earthwork and reduces the construction cost. Shear bars are set at the top of the peripheral foundation near the high fill area. The shear bars connect the peripheral foundation and the structure. The lateral earth pressure of the backfill soil in the high fill area on the structure is borne by the shear bars, thereby improving the bearing capacity of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the planar structure of a grid-type replacement foundation structure provided by an embodiment of the utility model;

[0021] Figure 2 for Figure 1 A schematic cross-sectional view along line AA;

[0022] Figure 3 for Figure 1 Schematic cross-sectional view along line BB.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Grid foundation; 11. Horizontal foundation; 12. Vertical foundation; 2. Peripheral foundation; 3. Shear resistance; 4. Structure. DETAILED DESCRIPTION

[0025] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0028] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0029] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0030] Reference Figure 1-3 As shown, an embodiment of the present application provides a grid-type replacement foundation structure, which includes a grid foundation 1 and a peripheral foundation 2. The grid foundation 1 includes multiple transverse foundations 11 and multiple longitudinal foundations 12. The longitudinal foundation 12 is arranged in the direction from the high fill area to the low fill area. The multiple longitudinal foundations 12 are spaced apart in a direction perpendicular to their lengths. The transverse foundation 11 is arranged in a direction perpendicular to the length of the longitudinal foundation 12, and the transverse foundation 11 connects the multiple longitudinal foundations 12. The multiple transverse foundations 11 are spaced apart in the length direction of the longitudinal foundation 12. The bottoms of the transverse foundations 11 and the longitudinal foundations 12 are embedded in bedrock. The peripheral foundation 2 is arranged around the grid foundation 1, and both ends of the transverse foundation 11 and the longitudinal foundation 12 are connected to the peripheral foundation 2. The bottom of the peripheral foundation 2 is embedded in the bedrock, and the inner side of the peripheral foundation 2 where the transverse foundation 11 and the longitudinal foundation 12 are not arranged is backfilled with earth.

[0031] Reference Figure 1-3 As shown, specifically, the bottom of the transverse foundation 11, the longitudinal foundation 12 and the peripheral foundation 2 are embedded in the bedrock to a depth of 0.5m-1m to ensure the connection strength between the transverse foundation 11, the longitudinal foundation 12 and the peripheral foundation 2 and the bedrock. The top elevations of the grid foundation 1 and the peripheral foundation 2 are the same as the bottom elevation of the bottom plate of the structure 4. The structure 4 is constructed directly on the foundation, and before construction, a cushion layer is constructed on the top of the foundation for leveling according to construction requirements.

[0032] Through the above arrangement, the transverse foundation 11 bears the lateral pressure of the earth from the high fill area to the low fill area between the high fill area and the low fill area, and the longitudinal foundation 12 is arranged along the direction from the high fill area to the low fill area and connected to the transverse foundation 11 to support the transverse foundation 11, thereby improving the strength of the transverse foundation 11 to improve the bearing capacity, and the peripheral foundation 2 is connected to the longitudinal foundation 12 and the transverse foundation 11 at the periphery of the grid foundation 1, connecting the entire foundation to form a whole, further improving the bearing capacity of the foundation, and the bottoms of the peripheral foundation 2 and the grid foundation 1 are embedded in the bedrock to transfer the vertical load of the upper structure 4 to the bedrock, and the entire foundation structure supports the structure 4 in the vertical direction, and at the same time can resist the lateral pressure of the earth caused by asymmetric backfill in the horizontal direction; the backfill earth in the area inside the peripheral foundation 2 where the transverse foundation 11 and the longitudinal foundation 12 are not arranged can be backfilled with the surface soil excavated in the early stage, thereby reducing the amount of borrowed earthwork and reducing construction costs.

[0033] Reference Figure 1-3 As shown, further, the outer foundation 2 is set to have a width greater than the width of the transverse foundation 11 and the longitudinal foundation 12. The lateral pressure of the outer soil layer directly acts on the outer foundation 2, and the transverse foundation 11 and the longitudinal foundation 12 support the outer foundation 2 on the inner side. Setting the width of the outer foundation 2 larger can improve its bearing capacity. The transverse foundation 11 and the longitudinal foundation 12 play an auxiliary role in the outer foundation 2, improve the bearing capacity of the outer foundation 2, and at the same time reduce the amount of concrete used to construct the transverse foundation 11 and the longitudinal foundation 12.

[0034] Reference Figure 1-3 As shown, further, the side of the peripheral foundation 2 close to the high fill area is arranged in a direction perpendicular to the length of the longitudinal foundation 12, and the width of this side of the peripheral foundation 2 is greater than the width of other areas; specifically, the side of the peripheral foundation 2 close to the high fill area is set to be parallel to the side of the high fill area, and this side of the peripheral foundation 2 directly bears the side pressure of the backfill soil in the high fill area, thereby improving the structural strength of the side of the peripheral foundation 2 close to the high fill area, enhancing the bearing capacity of the peripheral foundation 2, and effectively improving the bearing capacity of the foundation.

[0035] Furthermore, the outer foundation 2 and the grid foundation 1 are integrally cast and formed using C20 rubble stone concrete during construction.

[0036] Reference Figure 1-3 As shown, further, the side of the structure 4 close to the high fill area will also be subject to lateral pressure from the earth. In order to improve the lateral bearing capacity of the structure 4, a plurality of shear bars 3 are arranged on the top of the side of the outer foundation 2 close to the high fill area. The shear bars 3 are partially buried in the outer foundation 2 and used to connect with the structure 4. The plurality of shear bars 3 are distributed at intervals in a direction perpendicular to the length of the longitudinal foundation 12.

[0037] Reference Figure 1-3As shown, specifically, the shear bar 3 adopts a reinforced concrete shear bar 3, the embedded reinforcement of which is buried in the outer foundation 2, and the shear bar 3 is cast simultaneously when the outer foundation 2 is cast, and the upper end of the shear bar 3 is buried in the bottom plate of the structure 4 when the structure 4 is constructed; the outer foundation 2 and the structure 4 are connected by the shear bar 3, and the lateral earth pressure of the backfill soil in the high fill area on the structure 4 is borne by the shear bar 3, thereby improving the lateral bearing capacity of the structure 4.

[0038] The grid-type replacement foundation structure of this embodiment can also be used for foundation treatment with symmetrical backfill on both sides.

[0039] The construction method of the grid-type foundation structure of this embodiment is as follows:

[0040] Step 1: According to the plane dimensions of the grid foundation 1 and the peripheral foundation 2, remove the surface fill and broken rock layers to the complete bedrock surface.

[0041] Step 2: Dig trenches for the grid foundation 1 and the peripheral foundation 2 on the bedrock surface. The trench width is 1.6m-2m and the depth is 0.5m-1m. Roughen the trench surface.

[0042] Step 3: Use C20 rubble stone concrete to cast the grid foundation 1 and the outer foundation 2, wherein the original trench in the trench is cast, and the part above the trench is cast with formwork, and the height of the formwork is from the top of the trench to the bottom elevation of the bottom plate of the structure 4.

[0043] Step 4: Tie the shear key reinforcement bars according to the plane positioning. The shear key is made of C30 concrete and cast together with the top of the outer foundation 2.

[0044] Step 5: Remove the mold.

[0045] Step 6: The blank area inside the outer foundation 2 is compacted layer by layer with original soil and backfilled symmetrically.

[0046] The ground connection structure of the present application is formed by pouring concrete through supporting formwork during construction, and has low construction difficulty, no need for large-scale mechanical equipment, low site requirements, simple construction, short construction period, low cost, and little impact on the surrounding environment.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A grid-type replacement foundation structure, characterized in that: include: A grid foundation (1), comprising a plurality of transverse foundations (11) and a plurality of longitudinal foundations (12), wherein the longitudinal foundations (12) are arranged in a direction from a high fill area to a low fill area, and the plurality of longitudinal foundations (12) are spaced apart in a direction perpendicular to their lengths, and the transverse foundations (11) are arranged in a direction perpendicular to the lengths of the longitudinal foundations (12), and the transverse foundations (11) connect the plurality of longitudinal foundations (12), and the plurality of transverse foundations (11) are spaced apart in a direction of the lengths of the longitudinal foundations (12), and the bottoms of the transverse foundations (11) and the longitudinal foundations (12) are embedded in bedrock; A peripheral foundation (2) is arranged around the grid foundation (1), both ends of the transverse foundation (11) and both ends of the longitudinal foundation (12) are connected to the peripheral foundation (2), the bottom of the peripheral foundation (2) is embedded in the bedrock, and the inner side of the peripheral foundation (2) where the transverse foundation (11) and the longitudinal foundation (12) are not arranged is backfilled with earth; A plurality of shear bars (3) are arranged at the top of one side of the peripheral foundation (2) close to the high fill area. The shear bars (3) are partially embedded in the peripheral foundation (2) and are used to connect with the structure (4). The plurality of shear bars (3) are distributed at intervals along a direction perpendicular to the length of the longitudinal foundation (12).

2. The grid-type replacement foundation structure according to claim 1 is characterized in that: The top elevations of the grid foundation (1) and the peripheral foundation (2) are the same as the bottom elevation of the base plate of the structure (4).

3. The grid-type replacement foundation structure according to claim 1 is characterized in that: The bottoms of the transverse foundation (11), the longitudinal foundation (12) and the peripheral foundation (2) are embedded in the bedrock to a depth of 0.5m-1m.

4. The grid-type replacement foundation structure according to claim 1 is characterized in that: The grid foundation (1) and the peripheral foundation (2) are cast in one piece.

5. The grid-type replacement foundation structure according to claim 1 is characterized in that: The shear joint (3) is a reinforced concrete shear joint (3).

6. The grid-type replacement foundation structure according to claim 1 is characterized in that: The grid foundation (1) and the peripheral foundation (2) are rubble stone concrete foundations.

7. The grid-type replacement foundation structure according to claim 1 is characterized in that: The width of the peripheral foundation (2) is greater than the width of the transverse foundation (11) and the longitudinal foundation (12).

8. The grid-type replacement foundation structure according to claim 1 is characterized in that: The peripheral foundation (2) is arranged close to one side of the high fill area along a direction perpendicular to the length of the longitudinal foundation (12), and the width of this side of the peripheral foundation (2) is greater than the width of other areas.

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