CN211257915U

CN211257915U - Floor-adding structure of existing building underground space

Info

Publication number: CN211257915U
Application number: CN201921505557.5U
Authority: CN
Inventors: 朱毅敏; 徐磊; 王彬楠; 张文军; 张佳; 陈宇
Original assignee: Shanghai Construction No 1 Group Co Ltd
Current assignee: Shanghai Construction No 1 Group Co Ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-08-14
Anticipated expiration: 2029-09-11

Abstract

The utility model discloses an existing building underground space's floor-adding structure, including the newly-built envelope that covers the existing envelope's of existing building underground space peripheral construction, demolish the BM layer floor of rebuilding to B0 layer floor and newly-built BM +1 layer floor to BN layer floor to and along drilling bored concrete pile and the stand stake that BN layer floor set up downwards, wherein M, N is for being greater than 0 integer, and N > M. The utility model discloses can carry out safe, stable secondary development and utilize to the underground space of existing building, its simple structure and security are high.

Description

Floor-adding structure of existing building underground space

Technical Field

The utility model relates to a building engineering technical field, in particular to floor-adding structure in existing building underground space.

Background

In the technical field of construction engineering, along with the development of urban modernization, the contradictions and problems of urban land resource and space development are increasingly prominent, and the utilization of underground space is continuously three-dimensional. The problems of congestion of underground spaces, such as parking difficulty in traffic hub stations, large-scale venues, commercial buildings and residential districts, are increasingly prominent, and the sustainable development of cities is seriously influenced. Therefore, the reasonable development and utilization of the space below the basement of the existing building in the city is one of the effective ways for solving the contradiction between the land resources and the space development of the city at present. Therefore, how to further develop the underground space based on the underground space of the existing building becomes a technical problem which needs to be solved urgently in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a floor-adding structure of existing building underground space is provided to solve the problem to existing building underground space development.

In order to solve the technical problem, the utility model provides an existing building underground space increases layer structure adopts the method construction of increasing layer as above-mentioned existing building underground space, including the newly-built envelope that covers the existing envelope's of existing building underground space peripheral construction, demolish the BM layer floor to B0 floor and newly-built BM +1 layer floor to BN layer floor of rebuilding to and along the drilling bored concrete pile and the stand stake that BN layer floor set up downwards.

Further, the utility model provides an existing building underground space increases layer structure, newly-built envelope include underground enclosure wall, stagnant water curtain to and set up in the collar tie beam 203 at underground enclosure wall top, collar tie beam 203 with stagnant water curtain contact is connected.

Further, the utility model provides an existing building underground space increases layer structure, the stand stake is the lattice column.

Further, the utility model provides an existing building underground space increases layer structure, including demolising the existing BM layer floor of existing building underground space, carry out the soil body and excavate the foundation ditch that forms to the predetermined degree of depth, the BM layer floor of rebuilding to B0 layer floor and newly-built BM +1 layer floor to BN layer floor are located within the foundation ditch.

Further, the utility model provides an existing building underground space increases layer structure, still including setting up the vertical support post between the adjacent layer floor of rebuilding between B0 floor to rebuilding between the BM layer floor and newly-built BM +1 layer floor to BN layer floor.

Compared with the prior art, the utility model provides an existing building underground space increases floor structure forms four layers of basement structures, wherein demolish the BM layer floor of rebuilding to B0 layer floor and constitute two-layer basement structure for the existing basement number of piles, BM layer floor to BN layer floor constitute the two-layer basement structure of newly-increased. That is to say, the embodiment of the utility model provides an expand to existing two-layer basement structure and increased two-layer basement to the underground space to existing building has carried out secondary development and has utilized, the reasonable effectual development of going on existing city land resource. The new building envelope protects the structural stability of the existing building, and the upright posts can further protect the structural stability of the existing building and prevent collapse during the floor-adding construction of the underground space. The construction of the cast-in-situ bored pile is to form a vertical supporting system of an underground space so as to ensure the safety and stability of the existing building. The utility model discloses an existing building underground space increases layer structure, through the new-built envelope that covers the existing envelope of existing building underground space, demolish the BM layer floor of rebuilding to B0 layer floor and newly-built BM +1 layer floor to BN layer floor, realize the purpose of increasing the layer to existing building underground space. The expanded underground space and the existing buildings are supported through the cast-in-situ bored piles, so that the underground space and the existing buildings are protected, and the construction safety is ensured. The utility model discloses an existing building underground space increases layer structure has simple structure and the high effect of security.

Drawings

Fig. 1 to 8 are schematic process diagrams of a method for adding floors to an underground space of an existing building according to an embodiment of the present invention;

fig. 9 is a flowchart of a method for adding floors to an existing building underground space according to an embodiment of the present invention.

Shown in the figure: 111. the method comprises the steps of existing underground continuous walls, 112, existing water stop piles, 113, existing support beam replacement, 114, existing support plates, 121, existing B0 floors, 122, existing BM-1 floors, 123, existing BM floor slabs, 124, existing outer walls, 125, existing vertical supporting columns, 201, newly-built underground enclosure walls, 202, newly-built water stop piles, 203,

ring beams

203, 204, holes, 205, upright column piles, 206, bored concrete piles, 207, BN floor slabs, 208, BN-1 floors, 209, BM floor slabs, 210, BM-1 floors, 211, B0 floors, 300, pile drivers, 401, trestles, 402 and temporary supports.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

referring to fig. 1, the underground space of the existing building is M layers, where M is an integer greater than 0. The embodiment of the present invention will be described in detail by taking an example of a two-story existing building underground space where M is 2. The underground space of the existing building comprises an existing enclosing structure, a first floor of a basement and a second floor of an underground room. The existing enclosure structure comprises an existing underground continuous wall 112, a waterproof curtain formed by existing waterproof piles 111 and located on the periphery of the existing underground continuous wall 112, and an existing support replacing beam 113 and an existing support replacing plate 114 located on the inner side of the waterproof curtain. The existing building underground space further includes existing top floor 121, existing middle floor 122, and existing bottom floor 123, existing outer wall 124 located inside the existing bracing beams 113, and existing vertical bracing columns 125 disposed between the floors. Wherein the existing top floor 121, the existing middle floor 122 and the existing outer wall 124 form a first floor of the basement. The existing middle floor 122, the existing bottom floor 123 and the existing outer wall 124 form a second floor of the basement.

Referring to fig. 9, an embodiment of the present invention provides a floor-adding method for an underground space of an existing building, where the number of floor layers of the existing underground space is set to be M ═ 3, and the number of newly added floor layers is set to be L ═ 2.

Step 501, please refer to fig. 1, a newly-built underground enclosure wall 201 and a newly-built enclosure structure formed by a waterproof curtain are constructed on the periphery of an existing enclosure structure of an underground space of an existing building on M layers, wherein M is an integer greater than 0; the waterproof curtain comprises waterproof piles 202 arranged on the periphery of a newly-built underground enclosure wall 201.

Step 502, referring to fig. 2 and 3, the stud pile 205 is constructed downwards through the existing B0 floor 121 to the existing BM floor 123 of the underground space of the existing building. The staked posts 205 may be formed using lattice posts between floors and engineering posts below the underlying floor. Referring to fig. 1, before constructing the stud 205, there is a step of forming a hole 204 in the existing B0 floors 121 to 123, and the stud 20 is inserted through the hole 204.

Step 503, please refer to fig. 4, removing the existing B0 floor 121 of the underground space of the existing building to the existing BM-1 floor 122;

step 504, please refer to fig. 4, drilling the existing BM floor 123 in the underground space of the existing building, and constructing a cast-in-situ bored pile 206 downward;

step 505, please refer to fig. 5 to 6, removing the existing BM floor 123 in the underground space of the existing building, excavating the soil body to a predetermined depth to form a foundation pit, arranging a foundation pit support 402 at the periphery of the foundation pit, and newly building a BN floor 207 at the bottom of the foundation pit, wherein N is an integer greater than 0, and N > M; the foundation pit support 402 can ensure horizontal bearing capacity and prevent the risk of falling and collapsing of the wall body in the construction process of the foundation pit. The foundation pit supports 402 may be arranged in an increasing or decreasing manner according to the number of construction layers of the underground space. The foundation pit supports 402 are multiple tracks, and the distance between every two adjacent tracks of foundation pit supports 402 can be 2-3 meters.

Step 506, please refer to fig. 7 to 8, sequentially removing the foundation pit supports 402 upwards, newly building BN-1 floors 208 to BM +1 floors on the BN floor 207, and reconstructing BM +1 floors 209 to B0 floors 211 on the BM +1 floors by using a forward method, where N-M is the newly added floor number L. Because the embodiment of the utility model provides a set for the floor number of piles in existing underground space and be 3 for M, newly-increased floor is 2 for L. Therefore, in step 506, BN-1 floor 208 is equal to BM +1 floor. The embodiment of the utility model provides a be not limited to newly-increased two-layer floor, also not limited to only add the layer to the existing underground space that the floor number of piles is 3 layers.

Referring to fig. 8, the embodiment of the present invention further provides a storey-adding structure for the underground space of an existing building, which is constructed by the storey-adding method for the underground space of the existing building as described above, including a new enclosure structure constructed on the periphery of the existing enclosure structure covering the underground space of the existing building, and removing the reconstructed BM floor slabs 209 to B0 and the new BM +1 floor slabs 208 to BN floor slabs 207, and the bored concrete piles 206 and the upright piles 205 arranged downwards along the BN floor slab 207.

The embodiment of the utility model provides an existing building underground space increases layer method and structure forms four layers of basement structures, wherein demolish the BM layer floor 209 to B0 layer floor 211 that rebuild and constitute two-layer basement structure for the existing basement number of piles, BM layer floor 209 to BN layer floor 207 constitute newly-increased two-layer basement structure. That is to say, the embodiment of the utility model provides an expand to existing two-layer basement structure and increased two-layer basement to the underground space to existing building has carried out secondary development and has utilized, the reasonable effectual development of going on existing city land resource. The new building envelope protects the structural stability of the existing building and the underground space of the existing building, and the stud pile 205 is constructed from the floor slab 121 of the existing B0 layer to the floor slab 123 of the existing BM layer, so that the structural stability of the existing building can be protected and collapse can be prevented when the underground space is constructed by adding layers. The bored pile 206 is constructed to form a vertical supporting system of an underground space, so as to ensure the safety and stability of the existing building. The excavation of the soil body to the predetermined depth is to form a depth for increasing the underground space, so as to be used for newly building the increased number of floors, so as to expand, develop and utilize the existing underground space, construct and arrange the foundation pit support 402 by the method, and further protect the stability and safety of the construction of the expanded underground space. The utility model discloses an existing building underground space increases floor structure, through the new-built envelope who covers the existing envelope of existing building underground space, demolish the BM layer floor 209 to B0 layer floor 211 and newly-built BM +1 layer floor 208 to BN layer floor 207 of rebuilding, realize the purpose of increasing floor to existing building underground space. The expanded underground space and the existing buildings are supported through the cast-in-situ bored piles 206, so that the underground space and the existing buildings are protected, and the construction safety is ensured. The utility model discloses an existing building underground space increases layer structure has simple structure and the high effect of security.

Referring to fig. 3, the method for adding floors to an underground space of an existing building according to the embodiment of the present invention further includes constructing a trestle 401 between the underground enclosure walls 201 after the construction of the stud 205 and before the removal of the floor 121 of the existing B0 floor of the underground space of the existing building, wherein the trestle 401 is connected to the stud 205. The trestle 401 is used as a passage for construction on one hand and as a first foundation pit support in the foundation pit support on the other hand. The trestle 401 is connected with the upright piles 205, so that the stability of the trestle 401 can be protected, and risks such as deformation, collapse and falling off of the trestle are prevented. The trestle 401 can ensure horizontal bearing capacity.

Referring to fig. 4, in the method for increasing the floor space of the existing building according to the embodiment of the present invention, a water drilling machine 300 is used to drill a hole in the existing BM floor 123 of the existing building underground space.

Referring to fig. 4 to 8, the method for adding a layer to an underground space of an existing building provided by the present invention further includes removing an existing enclosure structure of the underground space of the existing building when the soil body is excavated to a predetermined depth. And the existing envelope structure is removed, so that the structural stability of the newly formed underground space can be ensured on one hand, and the area of the underground space can be increased on the other hand.

In order to guarantee construction safety, the embodiment of the utility model provides an existing building underground space's increase layer method sets up the horizontal brace after dismantling existing B0 floor 121 to existing BM-1 floor 122 of existing building underground space, before drilling existing BM floor 123 to existing building underground space.

In order to guarantee the structural stability of the underground space after adding a floor, the embodiment of the utility model provides an existing building underground space's the method of adding a floor sets up vertical braces between the adjacent layer floor of rebuilding between B0 floor 211 to BM layer floor 209 and between newly-built BM +1 layer floor 208 to BN layer floor 207.

Referring to fig. 1, in the method for adding a floor to an underground space of an existing building according to an embodiment of the present invention, a ring beam 203 is disposed at a top end of an underground enclosure wall 201, and the ring beam 203 is in contact with the waterproof curtain. The ring beam 203 can improve the structural stability of the underground enclosure wall 201.

The embodiment of the utility model provides an existing building underground space increases layer method and structure, newly-built envelope include underground enclosure 201, water-stop curtain to and set up in the collar tie beam 203 at underground enclosure 201 top, collar tie beam 203 with the contact of water-stop curtain is connected.

The present invention is not limited to the above embodiments, and any modifications and modifications made by those skilled in the art according to the above embodiments are within the scope of the claims.

Claims

1. A floor-adding structure of an existing building underground space is characterized by comprising a newly-built enclosure structure which is constructed on the periphery of an existing enclosure structure covering the existing building underground space, a reconstructed BM floor slab to a B0 floor slab, a newly-built BM +1 floor slab to a BN floor slab, and bored cast-in-place piles and upright piles which are arranged downwards along the BN floor slab, wherein M, N is an integer larger than 0, and N is larger than M.

2. The storey-adding structure of underground space of the existing building according to claim 1, wherein the newly-built enclosure comprises an underground enclosure wall, a waterproof curtain, and a ring beam arranged on the top of the underground enclosure wall, and the ring beam is in contact connection with the waterproof curtain.

3. The storey-adding structure of the underground space of the existing building according to claim 1, wherein the stud piles are lattice piles.

4. The storey-adding structure of the underground space of the existing building according to claim 1, comprising removing the existing BM storey floor of the underground space of the existing building, excavating the soil body to a predetermined depth to form a foundation pit, wherein the reconstructed BM storey floor to B0 storey floor and the newly-built BM +1 storey floor to BN storey floor are located in the foundation pit.

5. The storey-adding structure of the underground space of the existing building according to claim 1, further comprising vertical support columns disposed between adjacent floors between the reconstructed B0 floor and the reconstructed BM floor and between the newly-built BM +1 floor and the BN floor.