Construction method of deep foundation pit enclosure combined with shotcrete-anchor inversion and punching piles

A construction method and punching pile technology, which can be used in foundation structure engineering, excavation, sheet pile walls, etc., can solve problems such as affecting the safety of foundation pits and prone to collapse at the back-working support.

Active Publication Date: 2021-04-20
SHENZHEN MUNICIPAL ENG
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Problems solved by technology

[0005] The deep foundation pit enclosure construction method proposed by the present invention is a combination of spray anchor reverse operation and punching piles, which aims to solve the problem that collapse accidents are prone to occur at the reverse support in the prior art and affect the safety of the foundation pit

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  • Construction method of deep foundation pit enclosure combined with shotcrete-anchor inversion and punching piles
  • Construction method of deep foundation pit enclosure combined with shotcrete-anchor inversion and punching piles
  • Construction method of deep foundation pit enclosure combined with shotcrete-anchor inversion and punching piles

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] The implementation of the present invention will be described in detail below in conjunction with specific embodiments.

[0031] In the drawings of this embodiment, the same or similar symbols correspond to the same or similar components; The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orien...

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Abstract

The invention relates to the technical field of deep foundation pit protection, and discloses a construction method for deep foundation pit protection combined with spray anchor reverse operation and punching piles. Arranged rotary grouting piles; (2) Under the cables, set up a plurality of first grouting small conduits arranged obliquely downwards, and grout; (3) Dig down with the foundation pit, and under the cables Excavate the soil to form a counterwork section, spray concrete on the face of the counterwork section, and form a drilling plane at the bottom of the counterwork section; (4) Punch holes on the drilling plane to form multiple cast-in-situ piles to the preset position; (5) Fix the I-beam, the first steel mesh, and the connecting bars respectively in the reverse part, and spray concrete to close the reverse part; (6) dig down to the preset base along with the foundation pit, and take out multiple pouring parts. The earth on the outside of the pile exposes the cast-in-place pile to form a borehole, and a second steel mesh sheet is fixed in the borehole, and the borehole is sealed by spraying concrete.

Description

technical field [0001] The invention relates to the technical field of deep foundation pit enclosure, in particular to a construction method for deep foundation pit enclosure combining spray-anchor reverse operation and punching piles. Background technique [0002] A deep foundation pit refers to a project where the excavation depth exceeds 5 meters (including 5 meters), or the basement has more than three floors (including three floors), or the depth does not exceed 5 meters, but the geological conditions, surrounding environment and underground pipelines are particularly complicated. [0003] With the rapid development of the economy, it is not uncommon for the existing underground pipelines to intrude into the construction scope of the subway foundation pit. In order to solve the above problems, in the prior art, the structure constructed by the reverse method is used as the deep foundation pit enclosure. [0004] However, the internal support of the inversion part is mai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04E02D5/34E02D5/46
CPCE02D5/34E02D5/46E02D17/04
Inventor 龚颖梁世肖曦彬张建同江文锋罗灏然罗浪
Owner SHENZHEN MUNICIPAL ENG
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