Fabricated stepped foundation and construction method

Abstract

The application discloses an assembled step foundation and a construction method, and relates to the field of foundation construction.The assembled step foundation comprises a bottom foundation and a plurality of middle and upper layer foundations; the bottom foundation comprises a plurality of bottom splicing blocks; each middle and upper layer foundation is sequentially stacked on the bottom foundation from bottom to top, each middle and upper layer foundation comprises a plurality of middle and upper layer grid bodies, a plurality of middle and upper layer cavities are formed on the middle and upper layer grid bodies, each middle and upper layer cavity of the lowermost middle and upper layer grid body is communicated with a bottom cavity of a corresponding bottom grid body, and the bottom cavity and the corresponding middle and upper layer cavity constitute a pouring cavity for pouring a reinforced concrete structure.The beneficial effects of the technical scheme are as follows: the modular assembly form can greatly simplify the step foundation construction process, shorten the construction period, and form an integral whole of each middle and upper layer grid body and each bottom grid body after pouring the reinforced concrete structure, so that the structural strength is greatly enhanced and the construction quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation construction, in particular to a fabricated stepped foundation and a construction method thereof. BACKGROUND

[0002] In order to prevent the collapse of large ground structures such as electric towers, it is necessary to build a stepped foundation under the ground of the structure. The stepped foundation is a type of foundation formed by cementing reinforcement and concrete. Anchor bolts are embedded in the stepped foundation, which are connected to the upper structure to resist the pressure, tension, shear, bending moment, torque and other forces exerted on the stepped foundation by the upper structure.

[0003] The traditional stepped foundation construction process includes excavation of foundation pit, binding of reinforcement, formwork pouring of concrete, curing of concrete, removal of formwork, and corrosion prevention treatment of surface concrete (such as Chinese patent application No. CN201710775588.1). The construction process of the stepped foundation is complicated, the construction period is long, and the curing quality is limited by the process level and cannot be guaranteed. SUMMARY

[0004] Therefore, it is necessary to provide a fabricated stepped foundation and a construction method thereof to solve the technical problems of the traditional stepped foundation construction process being complicated, the construction period being long, and the curing quality being limited by the process level and cannot be guaranteed.

[0005] To achieve the above-mentioned purpose, the present application provides a fabricated stepped foundation, comprising a bottom foundation and a plurality of middle and upper layer foundations.

[0006] The bottom foundation comprises a plurality of bottom splicing blocks, each of which comprises a bottom plate and a bottom grid body. The bottom grid body is integrally formed with the bottom plate. A plurality of bottom cavities are formed on the bottom grid body. Adjacent two bottom splicing blocks are fixedly connected.

[0007] Each of the middle and upper layer foundations is sequentially stacked on the bottom foundation from bottom to top. Each of the middle and upper layer foundations comprises a plurality of middle and upper layer grid bodies. A plurality of middle and upper layer cavities are formed on each of the middle and upper layer grid bodies. Adjacent two middle and upper layer grid bodies of each of the middle and upper layer foundations are fixedly connected. Each of the middle and upper layer cavities of each of the middle and upper layer grid bodies is in communication with the middle and upper layer cavities of the middle and upper layer grid bodies located below. Each of the middle and upper layer cavities of the lowermost middle and upper layer grid body is in communication with the bottom cavity of the corresponding bottom grid body. The bottom cavity and the corresponding middle and upper layer cavity form a pouring cavity for pouring reinforced concrete structure.

[0008] In some embodiments, any of the middle and upper layer grid bodies is in abutment with at least two middle and upper layer grid bodies or bottom grid bodies of the lower layer.

[0009] In some embodiments, each outer side wall of each bottom layer grid body is provided with a plurality of first connecting holes; the bottom layer foundation further comprises a plurality of first bolts, each of which is used to pass through the first connecting holes of two adjacent bottom layer grid bodies to fix and connect the two adjacent bottom layer grid bodies.

[0010] In some embodiments, the lateral distance between two adjacent first connecting holes on each outer side wall of the bottom layer grid body is equal, and the opening height of each first connecting hole is equal.

[0011] In some embodiments, the first connecting hole is in communication with one bottom layer cavity.

[0012] In some embodiments, each outer side wall of each middle and upper layer grid body is provided with a plurality of second connecting holes; the middle and upper layer foundation further comprises a plurality of second bolts, each of which is used to pass through the second connecting holes of two adjacent middle and upper layer grid bodies to fix and connect the two adjacent middle and upper layer grid bodies.

[0013] In some embodiments, the lateral distance between two adjacent second connecting holes on each outer side wall of the middle and upper layer grid body is equal, and the opening height of each second connecting hole is equal.

[0014] In some embodiments, the upper end surface of the middle and upper layer grid body located at the uppermost layer is fixed with a plurality of fixing screws, which are used to be fixedly connected with a mounting base.

[0015] In some embodiments, the reinforced concrete structure comprises a steel reinforcement cage and a concrete pouring body, the steel reinforcement cage is inserted into the pouring cavity, and the concrete pouring body is formed in the pouring cavity.

[0016] The application also provides a construction method of the fabricated stepped foundation, which is suitable for the fabricated stepped foundation and comprises the following steps:

[0017] S1, a foundation pit is excavated on the ground at a predetermined construction position, and a concrete layer is laid on the bottom surface of the foundation pit;

[0018] S2, a bottom layer foundation is laid, after the concrete layer is solidified, each bottom layer splicing block is laid on the concrete layer, the bottom plate of each bottom layer splicing block is fixed with the concrete layer, and then two adjacent bottom layer splicing blocks are fixed and connected;

[0019] S3, a second layer foundation is laid, each middle and upper layer grid body is laid on the bottom layer foundation, it is ensured that each middle and upper layer grid body is laid above at least two bottom layer splicing blocks, it is ensured that each middle and upper layer cavity of each middle and upper layer grid body is aligned with the bottom layer cavity below, and then two adjacent middle and upper layer grid bodies are fixed and connected;

[0020] S4, sequentially lay each upper layer foundation of the upper layer, sequentially lay each upper layer grid body on the second layer foundation, ensure that each upper layer grid body is laid above at least two lower layer upper layer grid bodies, and ensure that each upper layer cavity of each upper layer grid body is aligned with the lower layer upper layer cavity, and then fix and connect the adjacent two upper layer grid bodies;

[0021] S5, pouring reinforced concrete structure in the pouring cavity formed by the bottom layer cavity and the corresponding upper layer cavity, so that each upper layer grid body and each bottom layer grid body form an integral whole;

[0022] S6, fixing the mounting base on the uppermost layer of the upper layer foundation, and then fixing the to-be-installed structure on the mounting base.

[0023] Compared with the prior art, the technical scheme provided by the application has the beneficial effects that: through the form of modular assembly, the construction process of the stepped foundation can be greatly simplified, and the construction period can be shortened, and since each upper layer cavity is aligned with the lower layer cavity, and each upper layer cavity of each upper layer grid body is aligned with the lower layer upper layer cavity, when the assembly is completed, each layer cavity is aligned, so that the pouring cavity formed by each layer cavity can be conveniently poured with reinforced concrete structure, and after pouring the reinforced concrete structure, each upper layer grid body and each bottom layer grid body can form an integral whole, the structural strength is greatly enhanced, and the construction quality is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a three-dimensional structure schematic diagram of an embodiment of the assembled stepped foundation provided by the application;

[0025] Figure 2 is an exploded view of the assembled stepped foundation in Figure 1

[0026] Figure 3 is a three-dimensional structure schematic diagram of the bottom layer foundation in Figure 1

[0027] Figure 4 is an exploded view of Figure 3

[0028] Figure 5 is a three-dimensional structure schematic diagram of one bottom layer splicing block in Figure 4

[0029] Figure 6 is an exploded view of the second layer upper layer foundation in Figure 1

[0030] Figure 7 is an exploded view of the second layer upper layer foundation in Figure 6 ​​​​​A perspective view of a middle and upper layer grid body in the assembled stepped foundation;

[0031] Figure 8 is Figure 1 A perspective view of the assembled stepped foundation after installation of the assembled stepped foundation;

[0032] In the figure: 1 - bottom foundation, 11 - bottom splicing block, 111 - bottom plate, 112 - bottom grid body, 1121 - bottom cavity, 1122 - first connecting hole, 2 - middle and upper layer foundation, 21 - middle and upper layer grid body, 211 - middle and upper layer cavity, 212 - second connecting hole, 3 - reinforced concrete structure, 31 - reinforcement cage, 32 - concrete pouring body, 4 - installation base, 5 - fixing screw rod, 6 - backfill layer. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present application will be described in detail below with reference to the drawings, wherein the drawings constitute a part of this application and serve to explain the principles of the embodiments of the present application, but are not used to limit the scope of the present application.

[0034] Please refer to Figures 1-8 The present application provides an assembled stepped foundation, which comprises a bottom foundation 1 and a plurality of middle and upper layer foundations 2.

[0035] The bottom foundation 1 comprises a plurality of bottom splicing blocks 11, each of which comprises a bottom plate 111 and a bottom grid body 112, the bottom grid body 112 is integrally formed with the bottom plate 111, a plurality of bottom cavities 1121 are formed on the bottom grid body 112, and two adjacent bottom splicing blocks 11 are fixedly connected.

[0036] Each of the middle and upper layer foundations 2 is sequentially stacked on the bottom foundation 1 from bottom to top, each of the middle and upper layer foundations 2 comprises a plurality of middle and upper layer grid bodies 21, a plurality of middle and upper layer cavities 211 are formed on the middle and upper layer grid bodies 21, two adjacent middle and upper layer grid bodies 21 of each of the middle and upper layer foundations 2 are fixedly connected, each of the middle and upper layer cavities 211 of each of the middle and upper layer grid bodies 21 is in communication with the middle and upper layer cavity 211 of the middle and upper layer grid body 21 located below, each of the middle and upper layer cavities 211 of the lowermost middle and upper layer grid body 21 is in communication with the corresponding bottom cavity 1121 of the bottom grid body 112, and the bottom cavity 1121 and the corresponding middle and upper layer cavity 211 form a pouring cavity for pouring a reinforced concrete structure 3.

[0037] In construction, a foundation pit is excavated on the ground at a preset construction position, and a concrete layer is laid on the bottom surface of the foundation pit; after the concrete layer is solidified, each bottom splicing block 11 is laid on the concrete layer, and the bottom plate 111 of each bottom splicing block 11 is fixed with the concrete layer, and then two adjacent bottom splicing blocks 11 are fixed and connected; then each middle-upper layer grid body 21 is laid on the bottom layer base 1, ensuring that each middle-upper layer grid body 21 is laid above at least two bottom splicing blocks 11, and at the same time, each middle-upper layer cavity 211 of each middle-upper layer grid body 21 is aligned with the bottom layer cavity 1121 below, and then two adjacent middle-upper layer grid bodies 21 are fixed and connected; then each middle-upper layer base 2 of a higher layer is laid in turn, each middle-upper layer grid body 21 is laid on the second layer base, ensuring that each middle-upper layer grid body 21 is laid above at least two middle-upper layer grid bodies 21 of the lower layer, and at the same time, each middle-upper layer cavity 211 of each middle-upper layer grid body 21 is aligned with the middle-upper layer cavity 211 below, and then two adjacent middle-upper layer grid bodies 21 are fixed and connected, and then reinforced concrete structures are poured into the pouring cavities composed of the bottom layer cavities and the corresponding middle-upper layer cavities, so that each middle-upper layer grid body 21 and each bottom layer grid body 112 form an integral whole; then the mounting base 4 is fixed on the uppermost middle-upper layer base 2, and then the foundation pit is backfilled, and then the mounting base 4 is fixed on the mounting base 4.

[0038] In the present application, the construction process of the stepped foundation can be greatly simplified and the construction period can be shortened by modular assembly. Since each middle-upper layer cavity 211 is aligned with the bottom layer cavity 1121 below, and each middle-upper layer cavity 211 of each middle-upper layer grid body 21 is aligned with the middle-upper layer cavity 211 below, the cavities of each layer are aligned after assembly, so that the pouring of reinforced concrete structures in the pouring cavities formed by the cavities of each layer is facilitated. After pouring the reinforced concrete structures 3, each middle-upper layer grid body 21 and each bottom layer grid body 112 form an integral whole, the structural strength is greatly enhanced, and the construction quality is guaranteed.

[0039] In order to form an integral whole of each middle-upper layer grid body 21 and each bottom layer grid body 112, please refer to Figures 1-4 In a preferred embodiment, any of the middle-upper layer grid bodies 21 are connected to at least two middle-upper layer grid bodies 21 or bottom layer grid bodies 112 of the lower layer, so that after pouring the reinforced concrete structures 3, since each middle-upper layer grid body 21 is connected to at least two middle-upper layer grid bodies 21 or bottom layer grid bodies 112 of the lower layer, the at least two middle-upper layer grid bodies 21 or bottom layer grid bodies 112 of the lower layer can be fixed together with high strength, thereby forming an integral whole of each middle-upper layer grid body 21 and each bottom layer grid body 112.

[0040] In order to realize the pre-fixing of the two adjacent bottom grid bodies 112, please refer to Figures 3-5 In a preferred embodiment, a plurality of first connecting holes 1122 are formed on each outer side wall of each bottom grid body 112; the bottom foundation 1 further comprises a plurality of first bolts, each of which is used to pass through the first connecting holes 1122 of the two adjacent bottom grid bodies 112, so as to fix and connect the two adjacent bottom grid bodies 112. It should be understood that the purpose of fixing and connecting the two adjacent bottom grid bodies 112 by the first bolts is only to realize the pre-fixing of the two bottom grid bodies 112, to facilitate the subsequent erection of the frame, and the increase of the overall structural strength does not depend on the first bolts. After the erection of the frame is completed, the bottom grid bodies 112 are formed into a whole by pouring the reinforced concrete structure 3, thereby improving the overall structural strength.

[0041] In order to facilitate the pre-fixing of the two adjacent bottom grid bodies 112, please refer to Figures 3-5 In a preferred embodiment, the transverse distance between the two adjacent first connecting holes 1122 on each outer side wall of the bottom grid body 112 is equal, and the opening height of each first connecting hole 1122 is equal, so that the two bottom grid bodies 112 can be spliced on any side surface, thereby improving the assembly convenience.

[0042] In order to facilitate the installation of each first bolt, please refer to Figures 3-5 In a preferred embodiment, the first connecting hole 1122 is in communication with the bottom cavity 1121.

[0043] In order to realize the pre-fixing of the two adjacent middle-upper grid bodies 21, please refer to Figure 6 and Figure 7 In a preferred embodiment, a plurality of second connecting holes 212 are formed on each outer side wall of each middle-upper grid body 21; the middle-upper foundation 2 further comprises a plurality of second bolts, each of which is used to pass through the second connecting holes 212 of the two adjacent middle-upper grid bodies 21, so as to fix and connect the two adjacent middle-upper grid bodies 21.

[0044] In order to facilitate the pre-fixing of the two adjacent middle-upper grid bodies 21, please refer to Figure 6 and Figure 7 In a preferred embodiment, the transverse distance between the two adjacent second connecting holes 212 on each outer side wall of the middle-upper grid body 21 is equal, and the opening height of each second connecting hole 212 is equal, so that the two middle-upper grid bodies 21 can be spliced on any side surface, thereby improving the assembly convenience.

[0045] In order to facilitate the fixing and installation of the base 4, please refer to Figure 1 and Figure 2In a preferred embodiment, a plurality of fixing screws 5 are fixed on the upper end surface of the upper-middle layer grid body 21 in the uppermost layer, and the fixing screws 5 are used to be fixedly connected with the mounting base 4.

[0046] In order to realize the function of the reinforced concrete structure 3, please refer to Figure 1 、 Figure 6 and Figure 7 In a preferred embodiment, the reinforced concrete structure 3 comprises a steel cage 31 and a concrete pouring body 32, the steel cage 31 is inserted into the pouring cavity, and the concrete pouring body 32 is formed in the pouring cavity.

[0047] The application also provides a construction method of the prefabricated stepped foundation, which is suitable for the prefabricated stepped foundation and comprises the following steps.

[0048] S1, a foundation pit is excavated on the ground at a predetermined construction position, and a concrete layer is laid on the bottom surface of the foundation pit;

[0049] S2, the bottom layer foundation 1 is laid, after the concrete layer is solidified, each bottom layer splicing block 11 is laid on the concrete layer, the bottom plate 111 of each bottom layer splicing block 11 is fixed with the concrete layer, and then two adjacent bottom layer splicing blocks 11 are fixed and connected;

[0050] S3, the second layer foundation is laid, each upper-middle layer grid body 21 is laid on the bottom layer foundation 1, it is guaranteed that each upper-middle layer grid body 21 is laid above at least two bottom layer splicing blocks 11, it is guaranteed that each upper-middle layer cavity 211 of each upper-middle layer grid body 21 is aligned with the bottom layer cavity 1121 below, and then two adjacent upper-middle layer grid bodies 21 are fixed and connected;

[0051] S4, each upper-middle layer foundation 2 is laid in turn, each upper-middle layer grid body 21 is laid in turn on the second layer foundation, it is guaranteed that each upper-middle layer grid body 21 is laid above at least two upper-middle layer grid bodies 21 below, it is guaranteed that each upper-middle layer cavity 211 of each upper-middle layer grid body 21 is aligned with the upper-middle layer cavity 211 below, and then two adjacent upper-middle layer grid bodies 21 are fixed and connected;

[0052] S5, the reinforced concrete structure 3 is poured in the plurality of pouring cavities composed of the bottom layer cavity 1121 and the corresponding upper-middle layer cavity 211, so that each upper-middle layer grid body 21 and each bottom layer grid body 112 form an integral whole, and then the foundation pit is backfilled to form a backfill layer 6;

[0053] S6, the mounting base 4 is fixed on the uppermost upper-middle layer foundation 2, and then the to-be-installed structure is fixed on the mounting base 4.

[0054] In the present application, the construction process of the stepped foundation can be greatly simplified and the construction period can be shortened by the form of modular assembly. Meanwhile, each middle and upper layer cavity 211 is aligned with the lower layer cavity 1121, and each middle and upper layer cavity 211 of each middle and upper layer grid body 21 is aligned with the lower layer cavity 211, so that each layer cavity is aligned after assembly, thereby facilitating the pouring of reinforced concrete structure in the pouring cavity formed by each layer cavity. After pouring the reinforced concrete structure 3, each middle and upper layer grid body 21 and each bottom layer grid body 112 form an integral whole, the structural strength is greatly enhanced, and the construction quality is guaranteed.

[0055] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which shall be covered within the protection scope of the present application.

Claims

1. A prefabricated stepped foundation, characterized in that, Includes the underlying foundation and several intermediate and upper-level foundations; The underlying foundation includes several underlying splicing blocks, each of which includes a base plate and an underlying grid body. The underlying grid body is integrally formed with the base plate, and several underlying cavities are formed on the underlying grid body. Two adjacent underlying splicing blocks are fixedly connected. Each of the middle and upper foundations is stacked sequentially on the bottom foundation from bottom to top. Each middle and upper foundation includes several middle and upper grid bodies, and several middle and upper cavities are formed on the middle and upper grid bodies. Two adjacent middle and upper grid bodies of each middle and upper foundation are fixedly connected. Each middle and upper cavity of each middle and upper grid body is connected to the corresponding middle and upper cavity of the middle and upper grid body below it. Each middle and upper cavity of the bottommost middle and upper grid body is connected to the bottom cavity of the corresponding bottom grid body. The bottom cavity and the corresponding middle and upper cavity form a casting cavity for pouring reinforced concrete structure.

2. The prefabricated stepped foundation according to claim 1, characterized in that, Each of the aforementioned upper-middle layer meshes is connected to at least two lower-middle layer meshes or the bottom layer meshes.

3. The prefabricated stepped foundation according to claim 1, characterized in that, Each of the outermost walls of each of the aforementioned bottom mesh bodies is provided with a plurality of first connection holes; The underlying foundation also includes a number of first bolts, each of which is used to pass through the first connection hole of two adjacent underlying meshes to fix the two adjacent underlying meshes together.

4. The prefabricated stepped foundation according to claim 3, characterized in that, The lateral distance between two adjacent first connecting holes on each outer side wall of the bottom mesh is equal, and the opening height of each first connecting hole is equal.

5. The prefabricated stepped foundation according to claim 3, characterized in that, The first connection hole communicates with one of the underlying cavities.

6. The prefabricated stepped foundation according to claim 1, characterized in that, Several second connection holes are provided on each outer side wall of each of the middle and upper layer meshes; The upper-middle foundation also includes several second bolts, each of which is used to pass through the second connection hole of two adjacent upper-middle grid bodies to fix the two adjacent upper-middle grid bodies together.

7. The prefabricated stepped foundation according to claim 6, characterized in that, The lateral distance between two adjacent second connecting holes on each outer side wall of the upper and middle layer mesh is equal, and the opening height of each second connecting hole is equal.

8. The prefabricated stepped foundation according to claim 1, characterized in that, Several fixing screws are fixed on the upper surface of the uppermost mesh body, which is used to fix it to the mounting base.

9. The prefabricated stepped foundation according to claim 1, characterized in that, The reinforced concrete structure includes a reinforcing cage and a concrete casting body. The reinforcing cage is inserted into the casting cavity, and the concrete casting body is formed in the casting cavity.

10. A construction method for a prefabricated stepped foundation, applicable to the prefabricated stepped foundation as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Excavate a foundation pit on the ground at the predetermined construction location, and lay a concrete layer on the bottom of the foundation pit. S2. Lay the bottom layer foundation. After the concrete layer has solidified, lay each bottom layer splicing block on the concrete layer and fix the bottom plate of each bottom layer splicing block to the concrete layer. Then fix and connect two adjacent bottom layer splicing blocks. S3. Lay the second layer of foundation, lay each middle and upper layer grid body on the bottom layer foundation, ensuring that each middle and upper layer grid body is laid on top of at least two bottom layer splicing blocks, and at the same time ensure that each middle and upper layer cavity of each middle and upper layer grid body is aligned with the bottom layer cavity below, and then fix two adjacent middle and upper layer grid bodies together. S4. Lay the uppermost middle and upper layers of foundation in sequence, and lay the middle and upper layers of grid bodies in sequence on the second layer foundation, ensuring that each middle and upper layer grid body is laid on top of at least two middle and upper layer grid bodies in the lower layer, and at the same time ensuring that each middle and upper layer cavity of each middle and upper layer grid body is aligned with the middle and upper layer cavity below, and then fix two adjacent middle and upper layer grid bodies together. S5. Cast reinforced concrete structures in several casting cavities composed of the bottom cavity and the corresponding middle and upper cavities, so that each middle and upper grid body and each bottom grid body form a whole. S6. Fix the mounting base on the uppermost middle layer foundation, and then fix the structure to be installed on the mounting base.

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