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Construction method for underground continuous wall of near-sea pushing and filling area

A technology of underground diaphragm wall and construction method, which is applied in the direction of excavation, sheet pile wall, foundation structure engineering, etc., to achieve the effect of ensuring accuracy, strengthening strength and connection performance, and ensuring safety

Active Publication Date: 2021-06-15
CHINA CONSTR FIRST BUILDING GRP CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a construction method of the underground diaphragm wall in the seaside push fill area, which is used to solve the guide wall, connecting wall and grouting of the annular underground diaphragm wall in the seaside area Technical issues such as targeted design and comprehensive control

Method used

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  • Construction method for underground continuous wall of near-sea pushing and filling area
  • Construction method for underground continuous wall of near-sea pushing and filling area
  • Construction method for underground continuous wall of near-sea pushing and filling area

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Embodiment Construction

[0044] Taking an LNG liquefied natural gas project as an example, the project is located on the northeast coast of a certain bay, and is basically formed by land reclamation, with a land area of ​​about 26 hectares. The foundation pit of the storage tank is a deep circular permanent foundation pit with an inner diameter of 100m and a depth of 50m; the upper part of the foundation pit is push-filled soil, and the lower part is slightly weathered granite; the enclosure structure adopts underground diaphragm walls without internal support. The underground diaphragm wall is 54-62m deep, and enters the slightly weathered granite 15-30m, and the rock strength reaches a maximum of 136Mpa.

[0045] Such as Figure 1 to Figure 5 As shown, the underground diaphragm wall includes a type I connecting wall 1, a type II connecting wall 2 connected between the adjacent type I connecting walls 1, and a sleeve set between the type I connecting wall 1 and the type II connecting wall 2 Milling ...

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Abstract

The invention discloses a construction method for an underground continuous wall of a near-sea pushing and filling area. The construction method comprises the following specific steps of 1, determining environmental conditions; 2, carrying out framing and segmenting; 3, reinforcing a slot wall; 4, constructing a guide wall; 5, recycling slurry; 6, after slotted holes are finished and accepted, cleaning the holes, and changing the slurry; 7, hoisting a reinforcement cage and pouring concrete; and 8, performing wall bottom grouting. Through the arrangement of reinforcing piles, the reinforcement of special geology in the near-sea pushing and filling area is guaranteed, and the construction safety is guaranteed; connection walls are arranged in a framing mode, so that the connection is guaranteed, and the subsequent cleaning construction is facilitated; through the arrangement of a slurry circulation preparation and purification system and alternate guide hole slot forming, the slurry can be circularly purified and utilized in the slot forming process of the continuous wall; and for pouring of the continuous wall and subsequent wall bottom grouting, design schemes and control conditions are provided for rapid and high-quality construction in a targeted manner.

Description

technical field [0001] The invention belongs to the technical field of underground diaphragm wall construction, and in particular relates to a construction method for an underground diaphragm wall in a seaside push-fill area. Background technique [0002] The LNG underground storage tank near the port has a large diameter and a deep depth. The upper part is generally pushed and filled with soil, the backfilling time is short, the soil layer is thick, the settlement is uneven, and the embedded capacity is weak. The rocks in the lower part are mainly granite, quartz porphyry, conglomerate, rock The foundation pit support environment is complicated due to its high strength, alternating soft and hard surfaces, steep cliffs, and broken zones that connect seawater with groundwater. It is necessary to formulate underground diaphragm wall support structures and construction methods according to local conditions to ensure the integrity of the LNG storage tank foundation pit project. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/18E02D17/08E02D15/02E02D33/00
CPCE02D5/187E02D17/08E02D15/02E02D17/083E02D33/00
Inventor 孟庆礼沙海程培春陈蕾裴晟旭史江川刘宴伟赵艳张晓明蒋建云
Owner CHINA CONSTR FIRST BUILDING GRP CORP LTD
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