Construction method of underground water prevention and exterior wall structures of narrow space of deep foundation pit

Abstract

The invention provides a construction method of underground water prevention and exterior wall structures of narrow space of a deep foundation pit. The construction method is used for a construction project of a deep foundation pit with narrow space in an urban center, concrete of a reserved trough is poured by single-side formworks arranged outside slope protection piles, a water prevention construction operation surface with outside prevention and inside attachment is formed, and meanwhile, the problem of backfilling of the reserved trough is solved; then construction of an exterior wall structure is carried out by the single-side formworks again; the problem that construction of exterior water prevention of the exterior wall, soil backfilling of the reserved trough, underground water prevention rolls and an underground structure exterior wall cannot be carried out due to insufficient space under the special condition is solved, water prevention construction of the exterior wall of a basement can be smoothly carried out effectively, and leakage is prevented. The construction method is clear in construction sequence and good in construction water prevention effect.

Description

technical field [0001] The invention relates to the field of deep foundation pit underground waterproofing and exterior wall structure construction, in particular to a deep foundation pit underground waterproofing and exterior wall structure construction method in a narrow space. Background technique [0002] At present, the underground waterproof construction of deep foundation pits in narrow spaces under special conditions mainly faces the following problems: [0003] (1) On the premise that the construction unit is pursuing the maximization of the building area, the area of ​​the foundation pit occupies more than 90% of the available construction area in the urban center area and the building-intensive area. Such situations are often accompanied by the existence of ultra-deep foundation pits. The construction deviation of the slope protection piles and the narrow design and construction surface make the waterproof construction of the underground external wall very difficu...

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Problems solved by technology

[0008] The invention provides a construction method for underground waterproofing and exterior wall structure in a narrow space of a deep foundation pit, which aims to solve the problems of inconvenient construction operation, waste of materials and labor, and poor waterproof quality in the construction of underground waterproofing and exterior wall structures in a deep foundation pit in a narrow space problems, and the technical problem that it is difficult to guarantee the flatness and verticality of the concrete surface of the fertilizer tank

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