Search

CN-121976563-A - Construction method of connecting wall between adjacent basements of reverse construction area

CN121976563ACN 121976563 ACN121976563 ACN 121976563ACN-121976563-A

Abstract

The invention discloses a connecting wall construction method between adjacent basements in a reverse construction area, which comprises the steps of excavating a foundation pit until the design elevation of a first floor slab of a first basement, constructing a first wall inner beam at the design position of a connecting wall, constructing the first floor slab and connecting the first wall inner beam to form a closed structure, continuously excavating the foundation pit until the design elevation of a second floor slab of a second basement, constructing a second wall inner beam at the design position of the connecting wall and connecting the second floor slab to form a closed structure, continuously excavating the foundation pit until the elevation of a foundation raft plate is constructed, and pouring a connecting wall by a formwork.

Inventors

  • WEI GUANG
  • WANG JINGWEN
  • Zang Ziheng
  • LU TONG
  • JI HAO

Assignees

  • 上海中建海外发展有限公司

Dates

Publication Date
20260505
Application Date
20260203

Claims (6)

  1. 1. The construction method of the connecting wall between adjacent basements in the reverse construction area is characterized in that a row of existing steel columns are driven into the design position of the connecting wall, and floors of a first basement and a second basement are staggered on two sides of the row of existing steel columns, and the construction method of the connecting wall comprises the following steps: Step 1, excavating a foundation pit until the design elevation of a first floor slab of the first basement is between the design elevation of a second floor slab of the second basement; Step 2, constructing a first wall inner beam at the design position of the connecting wall corresponding to the first floor design elevation; step 3, constructing the first floor slab and connecting the first floor slab with the first wall internal beam to form a closed structure; step 4, continuously excavating a foundation pit until the design elevation of the second building board is between the design elevation of the foundation raft board; step 5, constructing a second wall inner beam at the design position of the connecting wall corresponding to the second floor design elevation; step 6, constructing the second floor slab and connecting the second floor slab with the second wall internal beam to form a closed structure; Step 7, continuously excavating a foundation pit until the elevation of the foundation raft is reached, and constructing the foundation raft; and 8, supporting a mould to pour the connecting wall, and pouring the first wall inner beam and the second wall inner beam.
  2. 2. The method for constructing a connecting wall between adjacent basements in a reverse construction area according to claim 1, wherein a first horizontal steel beam is constructed below a design elevation of the first floor slab before and after the step 2 is performed, a row of the existing steel columns are connected in series by the first horizontal steel beam, and a formwork of a first in-wall beam is supported and poured based on the first horizontal steel beam when the step 2 is performed.
  3. 3. The method for constructing a connecting wall between adjacent basements in a reverse construction area according to claim 2, wherein a second horizontal steel beam is constructed below the design elevation of the second floor slab before and after the step 5 is performed, a row of the existing steel columns is connected in series by the second horizontal steel beam, and a formwork of a second in-wall beam is supported and poured based on the second horizontal steel beam when the step 5 is performed.
  4. 4. A method of constructing a junction wall between adjacent basements in a reverse construction area as claimed in claim 3, wherein said first horizontal beam and said second horizontal beam are removed before said step 8 is performed and after said step 7 is performed.
  5. 5. The method for constructing a connecting wall between adjacent basements in a reverse construction area according to claim 1, wherein the anchor bars are reserved at the upper and lower ends of the first and second inner girders when the steps 2 and 5 are performed, and the reinforcement cage of the connecting wall is connected with the anchor bars on the first and second inner girders when the step 8 is performed.
  6. 6. The method of constructing a connecting wall between adjacent basements in a reverse construction area according to claim 1, wherein the surfaces of said first and second interior beams are roughened before said step 8 is performed and after said step 7 is performed.

Description

Construction method of connecting wall between adjacent basements of reverse construction area Technical Field The invention relates to the technical field of building construction, in particular to a connecting wall construction method between adjacent basements of a reverse construction area. Background In super high-rise basement construction, the reverse construction method can utilize the constructed floor slab as a horizontal support to control the displacement of the enclosure structure and accelerate the upper construction. When two single basements are adjacent and a concrete connecting wall is arranged between the two single basements and is positioned in a reverse construction area, if elevation of basement floor slabs at two sides of the connecting wall is inconsistent, the connecting wall and node structures of the connecting wall and the floor slabs can be finished according to conventional practice before the floor slabs at two sides can be constructed, however, the working surface of the reverse construction area is limited, the stress path of an earthwork excavation and supporting system is complex, the connecting wall is difficult to form in advance, and further the sealing plates of the floor slabs at two sides and the integral supporting system are influenced, so that construction period delay and construction risk are easy to cause. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a connecting wall construction method between adjacent basements in a reverse construction area, wherein an inner wall beam is constructed at a design position of the connecting wall to provide a support for a basement floor slab so as to form a closed structure, and then the connecting wall is constructed in a rear-mounted manner, so that the structural stability is ensured on the premise of not influencing the basement construction efficiency. In order to achieve the above purpose, the technical scheme adopted by the invention is a method for constructing a connecting wall between adjacent basements in a reverse construction area, a row of existing steel columns are driven into a design position of the connecting wall, floors of a first basement and a second basement are staggered from each other on two sides of the row of the existing steel columns, and the method for constructing the connecting wall comprises the following steps: Step 1, excavating a foundation pit until the design elevation of a first floor slab of the first basement is between the design elevation of a second floor slab of the second basement; Step 2, constructing a first wall inner beam at the design position of the connecting wall corresponding to the first floor design elevation; step 3, constructing the first floor slab and connecting the first floor slab with the first wall internal beam to form a closed structure; step 4, continuously excavating a foundation pit until the design elevation of the second building board is between the design elevation of the foundation raft board; step 5, constructing a second wall inner beam at the design position of the connecting wall corresponding to the second floor design elevation; step 6, constructing the second floor slab and connecting the second floor slab with the second wall internal beam to form a closed structure; Step 7, continuously excavating a foundation pit until the elevation of the foundation raft is reached, and constructing the foundation raft; and 8, supporting a mould to pour the connecting wall, and pouring the first wall inner beam and the second wall inner beam. The invention further improves the construction method of the connecting wall between adjacent basements of the reverse construction area, which is characterized in that a first horizontal steel beam is constructed below the design elevation of the first floor slab before the step 2 is executed and after the step 1 is executed, so that a row of existing steel columns are connected in series by the first horizontal steel beam, and when the step 2 is executed, a template of a first wall inner beam is supported and poured on the basis of the first horizontal steel beam. The invention further improves the construction method of the connecting wall between the adjacent basements of the reverse construction area, which is characterized in that a second horizontal steel beam is constructed below the design elevation of the second floor slab before the step 5 is executed and after the step 4 is executed, so that a row of the existing steel columns are connected in series by the second horizontal steel beam, and when the step 5 is executed, a template of a second wall inner beam is supported and poured on the basis of the second horizontal steel beam. The construction method of the connecting wall between the adjacent basements of the reverse construction area is further improved in that the first horizontal steel beam and the second horizontal steel beam are dismantled befor