A retaining structure and construction method utilizing rigidity of basement

Abstract

The present invention relates to a retaining structure and construction method using the rigidity of a basement, belonging to the field of civil engineering technology. The retaining structure includes a retaining structure main body, a plurality of pile foundations are arranged below the retaining structure main body, the plurality of pile foundations are connected to the retaining structure main body through corresponding caps, the retaining structure main body is connected to the side wall of the basement through a plurality of supporting structures, and the plurality of supporting structures correspond to the pile foundations one by one. The present invention provides a very strong fulcrum for the bottom connecting beam, the top connecting beam and the inclined supporting beam through the side wall of the basement, and by arranging caps and pile foundations at intervals below the retaining structure main body, sufficient construction space can be reserved when the distance is very close to an existing building (or bridge); the top connecting beam is passed through the retaining structure main body and then picked out, and the picked-out end is subjected to force by the top connecting beam and the retaining structure main body below it, effectively solving the connection problem between the newly built retaining structure and the existing building (or bridge).

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering and relates to a retaining structure utilizing the rigidity of a basement and a construction method. Background Art

[0002] Current residential and commercial complex projects all have multi-story basements. When a road needs to be laid between the project and an existing building (or bridge), a retaining structure needs to be set up under the road. Current retaining structures such as self-weight, cantilever, armrest, and closely spaced retaining piles all have the following disadvantages:

[0003] 1. When the retaining structure to be set up is very close to an existing building (or bridge), it cannot be implemented due to the lack of a construction surface.

[0004] 2. When the construction surface can meet the construction requirements, the retaining structure may not be connected to the existing building (or bridge) because the existing building (or bridge) cannot bear the additional load. Summary of the invention

[0005] The purpose of the present invention is to provide a retaining structure and a construction method that utilizes the rigidity of a basement, by providing very strong fulcrums for bottom connecting beams, top connecting beams and oblique support beams through the side walls of the basement, by arranging pedestals and pile foundations at intervals below the main body of the retaining structure, the deadweight of the main body of the retaining structure and the vertical load it receives are directly transferred to the pile foundation, and when the distance to the existing building (or bridge) is very close, sufficient construction space can be reserved; the top connecting beam is passed through the main body of the retaining structure and then extended out, and the extended end is subjected to force by the top connecting beam and the main body of the retaining structure below it, which effectively solves the connection problem between the newly built retaining structure and the existing building (or bridge).

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A retaining structure utilizing the rigidity of a basement, comprising a retaining structure main body, a plurality of pile foundations being arranged below the retaining structure main body, the plurality of pile foundations being connected to the retaining structure main body through corresponding caps, the retaining structure main body being connected to a side wall of the basement through a plurality of supporting structures, the plurality of supporting structures corresponding one to one with the pile foundations;

[0008] The supporting structure includes a top connecting beam and a bottom connecting beam arranged below the top connecting beam, one end of the top connecting beam is connected to the side wall of the basement, and the two ends of the bottom connecting beam are respectively connected to the side wall of the basement and the pedestal, a vertical support beam and an oblique support beam are arranged between the top connecting beam and the bottom connecting beam, and the vertical support beam is arranged between the two oblique support beams.

[0009] As a preferred technical solution of the present invention, the interval between two adjacent pile foundations is the same.

[0010] As a preferred technical solution of the present invention, the plurality of pile foundations are deeply inserted into the soil.

[0011] As a preferred technical solution of the present invention, one end of the top connecting beam away from the basement side wall is connected to a sealing beam, and a floor slab is provided on the side of the retaining structure body away from the basement side wall, and the floor slab is fixed on the top connecting beam and the sealing beam.

[0012] As a preferred technical solution of the present invention, the main body of the retaining structure and the top end surface of the floor slab are on the same horizontal plane.

[0013] As a preferred technical solution of the present invention, the sealing beam is arranged at the expansion joint of the existing building.

[0014] A construction method of a retaining structure utilizing the rigidity of a basement comprises the following steps:

[0015] S1: construct several pile foundations and caps at a certain distance from the existing buildings;

[0016] S2: A bottom connecting beam is set at a position corresponding to the cap;

[0017] S3: construct the main retaining structure on the cap, and construct the vertical support beam and the inclined support beam on the bottom connecting beam;

[0018] S4: A top connecting beam is arranged on the top of the vertical supporting beam and the inclined supporting beam, one end of the top connecting beam is connected to the side wall of the basement, and the other end of the top connecting beam passes through the main body of the retaining structure and is connected to the sealing beam;

[0019] S5: A floor slab is set at the end of the top connecting beam away from the basement side wall and above the sealing beam, and the earth is backfilled and compacted between the main retaining structure and the basement side wall;

[0020] S6: Complete the construction by setting the pavement above the floor slab and on top of the backfill.

[0021] As a preferred technical solution of the construction method, a plurality of pile foundations are arranged at equal intervals.

[0022] As a preferred technical solution of the construction method, one end of the bottom connecting beam is connected to the side wall of the basement, and the other end of the bottom connecting beam is connected to the corresponding pedestal.

[0023] Beneficial effects of the present invention:

[0024] (1) The side walls of the basement provide very strong fulcrums for the bottom connecting beams, top connecting beams and inclined support beams, forming a favorable connection to the main body of the retaining structure. By setting up pedestals and pile foundations at intervals below the main body of the retaining structure, the deadweight of the main body of the retaining structure and the vertical loads it receives are directly transferred to the pile foundation. When the basement is very close to an existing building (or bridge), sufficient construction space can be reserved.

[0025] (2) The top connecting beam is passed through the main body of the retaining structure and then extended out. The extended end is subjected to the load by the top connecting beam and the main body of the retaining structure below it. The load borne by the existing building (or bridge) is not increased or the stress-bearing mode of the existing building (or bridge) is not changed, thus effectively solving the connection problem between the new retaining structure and the existing building (or bridge). BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the environment of the construction site;

[0028] Figure 2 It is a cross-sectional view showing the positional relationship between the structure and the basement and existing buildings;

[0029] Figure 3 It is a three-dimensional diagram showing the positional relationship between this structure and the basement;

[0030] Figure 4 It is a schematic diagram of the forces around the structural member;

[0031] Figure 5 It is the overall force diagram of this structure;

[0032] Description of main component symbols:

[0033] In the figure: 1. Main body of retaining structure; 2. Pile foundation; 3. Side wall of basement; 4. Support structure; 41. Top connecting beam; 42. Bottom connecting beam; 43. Vertical supporting beam; 44. Oblique supporting beam; 5. Floor slab; 6. Existing building; 7. Capping platform; 8. Sealing beam. DETAILED DESCRIPTION

[0034] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0035] See also Figure 1-5As shown, a retaining structure using the rigidity of a basement includes a retaining structure body 1, a plurality of pile foundations 2 are arranged below the retaining structure body 1, the plurality of pile foundations 2 are connected to the retaining structure body 1 through corresponding caps 7, the retaining structure body 1 is connected to a side wall 3 of the basement through a plurality of supporting structures 4, and the plurality of supporting structures 4 correspond to the pile foundations 2 one by one;

[0036] The supporting structure 4 includes a top connecting beam 41 and a bottom connecting beam 42 arranged below the top connecting beam 41, one end of the top connecting beam 41 is connected to the basement side wall 3, and the two ends of the bottom connecting beam 42 are respectively connected to the basement side wall 3 and the pedestal 7, a vertical support beam 43 and an oblique support beam 44 are arranged between the top connecting beam 41 and the bottom connecting beam 42, and the vertical support beam 43 is arranged between the two oblique support beams 44.

[0037] The intervals between two adjacent pile foundations 2 are the same.

[0038] The plurality of pile foundations 2 are deeply inserted into the soil.

[0039] One end of the top connecting beam 41 away from the basement side wall 3 is connected to a sealing beam 8 , and a floor slab 5 is provided on the side of the retaining structure body 1 away from the basement side wall 3 , and the floor slab 5 is fixed on the top connecting beam 41 and the sealing beam 8 .

[0040] The top surfaces of the retaining structure body 1 and the floor slab 5 are on the same horizontal plane.

[0041] The sealing beam 8 is arranged at the expansion joint of the existing building 6 .

[0042] In this embodiment, earth is backfilled and compacted between the retaining structure body 1 and the basement side wall 3. By arranging the cap 7 and the pile foundation 2 at intervals below the retaining structure body 1, the deadweight of the retaining structure body 1 and the vertical load it receives are directly transferred to the pile foundation 2. When the distance to the existing building 6 (or bridge) is very close, sufficient construction space can be reserved for the retaining structure body 1, the cap 7 and the pile foundation 2.

[0043] By arranging the vertical support beam 43 between the bottom connecting beam 42 and the top connecting beam 41, not only part of the force borne by the bottom connecting beam 42 is directly transferred to the top connecting beam 41, so that the two connecting beams are evenly stressed, but also the integrity of the two connecting beams is enhanced, the unsupported length of the two connecting beams is reduced, and the horizontal tensile resistance of the two connecting beams is improved.

[0044] This structure makes full use of the high rigidity of the basement, provides fulcrums for the bottom connecting beam 42, the top connecting beam 41 and the inclined support beam 44, forms a favorable connection to the retaining structure body 1, and integrates the basement, the retaining structure body 1 and the backfill soil in between, thereby enhancing the embedding effect of the soil around the basement on the basement, and improving the earthquake resistance of the basement and the upper buildings.

[0045] During the backfilling process, the horizontal earth pressure on the retaining structure body 1 becomes greater as the inner backfill gradually rises, and the weight of the backfill itself exerted on the bottom connecting beam 42 and the inclined support beam 44 becomes greater and greater. Due to the connecting effect of the inclined support beam 44, the top of the retaining structure body 1 is subjected to an increasingly greater horizontal tension from the inclined support beam 44. This horizontal tension actively and effectively blocks the tendency of the top of the retaining structure body 1 to move laterally (i.e., tip over) outward during the backfilling process, which not only greatly reduces the harmful horizontal displacement of the top of the retaining structure body 1 to the outside, but also reduces the degree of downward deformation of the middle part of the bottom connecting beam 42, thereby ensuring the horizontal tension of the bottom connecting beam 42 on the bottom of the retaining structure body 1.

[0046] After the backfill is completed, the backfill will settle over time. During the backfill settlement process, the sides of the bottom connecting beam 42, the top connecting beam 41, the oblique support beam 44 and the vertical support beam 43 will be affected by the negative friction of the backfill downward. A small part of the negative friction is transmitted to the retaining structure body 1 through the connection nodes between the bottom connecting beam 42, the top connecting beam 41 and the retaining structure body 1, and finally to the pile foundation 2. Most of the negative friction is transmitted to the top of the retaining structure body 1 through the oblique support beam 44, forming a continuous inward pulling force on the top of the retaining structure body 1. This pulling force effectively prevents the top of the retaining structure body 1 from deforming outward, and reduces the creep effect of the retaining structure body 1 under the continuous action of the inner horizontal soil pressure. This structure utilizes the negative friction of the backfill on the side of the structure to enhance the durability of the retaining structure body 1.

[0047] When the distance between the basement and the retaining structure body 1 is long, by adjusting the spacing between the oblique support beams 44 and the vertical support beams 43, appropriately increasing the oblique support beams 44 and the vertical support beams 43, and appropriately adding foundation supports at the bottom of the bottom connecting beams 42, etc., a spatial structure similar to the present structural technology can be formed, which has a very wide range of applications.

[0048] The end of the top connecting beam 41 away from the basement side wall 3 passes through the retaining structure body 1 and is cantilevered out, and a sealing beam 8 is set at the extended end of the top connecting beam 41. A reinforced concrete floor 5 is set between the retaining structure body 1, the two extended parts of the top connecting beams 41 and the sealing beam 8, and a road surface or other site is paved above the floor 5 to connect with the existing building 6 (or bridge). This structure will not increase the load borne by the existing building 6 (or bridge) or change the force mode of the existing building 6 (or bridge), and effectively solves the connection problem between the new retaining structure and the existing building 6 (or bridge).

[0049] Specifically, the intervals between two adjacent pile foundations 2 are the same.

[0050] The plurality of pile foundations 2 are deeply inserted into the soil.

[0051] In this embodiment, the pile foundations 2 are evenly arranged so that each pile foundation 2 bears the same pressure, and the structural stability is higher. The pile foundation 2 is deeply inserted into the soil, which can be applied to various terrains.

[0052] The present invention comprises the following steps during construction:

[0053] S1: constructing a plurality of pile foundations 2 and capping platforms 7 at a certain distance from an existing building 6, wherein the plurality of pile foundations 2 are arranged at a certain interval;

[0054] S2: a bottom connecting beam 42 is arranged at a position corresponding to the cap 7, one end of the bottom connecting beam 42 is connected to the basement side wall 3, and the other end of the bottom connecting beam 42 is connected to the corresponding cap 7;

[0055] S3: construct the retaining structure body 1 on the cap 7, and construct the vertical support beam 43 and the inclined support beam 44 on the bottom connecting beam 42;

[0056] S4: a top connecting beam 41 is arranged on the top of the vertical supporting beam 43 and the inclined supporting beam 44, one end of the top connecting beam 41 is connected to the basement side wall 3, and the other end of the top connecting beam 41 passes through the retaining structure body 1 and is connected to the sealing beam 8;

[0057] S5: a floor slab 5 is arranged at one end of the top connecting beam 41 away from the basement side wall 3 and above the sealing beam 8, and earth is backfilled and compacted between the retaining structure body 1 and the basement side wall 3;

[0058] S6: A road surface is set above the floor slab 5 and on top of the backfill soil to complete the construction.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A retaining structure utilizing the rigidity of a basement, comprising a retaining structure main body (1), characterized in that: A plurality of pile foundations (2) are arranged below the retaining structure body (1), the plurality of pile foundations (2) being connected to the retaining structure body (1) via corresponding caps (7), the retaining structure body (1) being connected to the basement side wall (3) via a plurality of support structures (4), the plurality of support structures (4) corresponding one to one to the pile foundations (2); The support structure (4) comprises a top connecting beam (41) and a bottom connecting beam (42) arranged below the top connecting beam (41); one end of the top connecting beam (41) is connected to the basement side wall (3); two ends of the bottom connecting beam (42) are respectively connected to the basement side wall (3) and the pedestal (7); a vertical support beam (43) and an oblique support beam (44) are arranged between the top connecting beam (41) and the bottom connecting beam (42); the vertical support beam (43) is arranged between the two oblique support beams (44); One end of the top connecting beam (41) away from the basement side wall (3) is connected to a sealing beam (8); a side of the retaining structure body (1) away from the basement side wall (3) is provided with a floor slab (5); the floor slab (5) is fixed to the top connecting beam (41) and the sealing beam (8); The sealing beam (8) is arranged at the expansion joint of the existing building (6); The top connecting beam passes through the retaining structure body and then extends out, and the extended end is stressed by the top connecting beam and the retaining structure body below it. A road surface or other site is paved above the floor slab and connected to an existing building or bridge.

2. The retaining structure using the rigidity of the basement according to claim 1, characterized in that: The interval between two adjacent pile foundations (2) is the same.

3. The retaining structure using the rigidity of the basement according to claim 1, characterized in that: The plurality of pile foundations (2) are deeply inserted into the soil.

4. The retaining structure using the rigidity of the basement according to claim 1, characterized in that: The top surfaces of the retaining structure body (1) and the floor slab (5) are on the same horizontal plane.

5. A construction method of a retaining structure utilizing the rigidity of a basement, based on the retaining structure utilizing the rigidity of a basement as claimed in claim 1, characterized in that: The following steps are involved: S1: construct a number of pile foundations (2) and capping platforms (7) at a certain distance from the existing building (6); S2: Arranging a bottom connecting beam (42) at a position corresponding to the cap (7); S3: constructing the retaining structure main body (1) on the cap (7), and constructing the vertical support beam (43) and the inclined support beam (44) on the bottom connecting beam (42); S4: a top connecting beam (41) is arranged on the top of the vertical support beam (43) and the inclined support beam (44), one end of the top connecting beam (41) is connected to the basement side wall (3), and the other end of the top connecting beam (41) passes through the retaining structure body (1) and is connected to the sealing beam (8); S5: a floor slab (5) is arranged on the end of the top connecting beam (41) away from the basement side wall (3) and above the sealing beam (8), and earth is backfilled and compacted between the retaining structure body (1) and the basement side wall (3); S6: A road surface is set above the floor slab (5) and on top of the backfill to complete the construction.

6. A construction method of a retaining structure using the rigidity of a basement according to claim 5, characterized in that: A plurality of pile foundations (2) are arranged at equal intervals.

7. A construction method of a retaining structure using the rigidity of a basement according to claim 5, characterized in that: One end of the bottom connecting beam (42) is connected to the basement side wall (3), and the other end of the bottom connecting beam (42) is connected to the corresponding bearing platform (7).

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