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Deep foundation pit early warning processing method

A treatment method and technology for deep foundation pits, which are applied in excavation, infrastructure engineering, sheet pile walls, etc., can solve the problems of unloading treatment, large foundation pit area, and long construction period, so as to improve the benefits of foundation pit engineering and ensure foundation. The effect of pit safety and enhancing bearing capacity

Active Publication Date: 2021-10-15
SHANGHAI BAOYE GRP CORP
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Problems solved by technology

[0004] Full unloading: the area of ​​the foundation pit is too large, the amount of earthwork outside the pit is large, the economic cost is relatively high, and the construction period is long; at the same time, there are other construction impacts, so it is impossible to unload all;
[0005] Partial unloading: After excavation, it may be affected by the rainy season and soil quality. Rainwater and groundwater flow back and accumulate, and there is still lateral pressure. Moreover, the construction road next to it is blocked, and unloading is not allowed. There is also too much water, which changes The soil quality at the construction road will destroy the stress structure of the natural foundation at the construction road;
[0006] To sum up, the traditional treatment method cannot well guarantee the safety of the underground structure construction and the surrounding environment of the foundation pit and the stability of the internal support structure in similar environments, and it is costly and time-consuming

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Embodiment Construction

[0031] Such as figure 1 Shown: a deep foundation pit early warning processing method, construction process:

[0032] A. Question statistics:

[0033] (1) Surface cracks and partial subsidence appear on the north slope of the foundation pit;

[0034] (2) Penetration cracks appear at the end of the connecting beam and the crown beam, and the inner support ring beam;

[0035] B. Reason analysis:

[0036] According to the statistics of field problems, the development trend of the cracks in the supporting beams is from top to bottom, and the preliminary analysis is caused by the cracking. The water and soil pressure on the north and east sides is relatively high, forming a bias pressure from northeast to southwest on the foundation pit, and the foundation pit as a whole is offset to the south and west sides, and the north and east sides of the pile body form a larger side at 10m to 15m. to the displacement. The construction excavation from east to west forms a synergistic effe...

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Abstract

The invention relates to a deep foundation pit early warning processing method. The construction process flow comprises the steps of surveying and setting out, replacement and filling of the root of a supporting column pile, construction of a temporary door-shaped supporting stand column, steel beam hoisting, inclined strut welding construction, reinforced concrete wrapping reinforcement construction, repairing of cracks of an annular beam and the like, detecting, and subsequent construction. The construction method is simplified, the construction efficiency is improved, the economic cost is saved, later construction is facilitated, and the safety guarantee is improved.

Description

technical field [0001] The invention relates to the field of foundation pit processing, in particular to a deep foundation pit early warning processing method. Background technique [0002] During the construction stage of foundation pit excavation, many foundation pits with super large area and various plane forms, especially deep foundation pit projects such as square and polygon, cannot meet the natural slope due to site constraints or the influence of the surrounding environment. In order to ensure the construction of underground structures and For the safety of the surrounding environment of the foundation pit, people often adopt support, reinforcement and protection measures for the side wall of the foundation pit and the surrounding environment, so the ring support form has the advantages of good mechanical performance, high rigidity, small deformation, and very significant economic benefits. It has become the first choice for many structural designs; however, due to ...

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Application Information

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IPC IPC(8): E02D17/04E02D5/76E02D19/10
CPCE02D17/04E02D5/765E02D19/10
Inventor 程雄胡振海万培鸿卜华超尹岳林凌志鹏石旭月靳博文邹秀昌
Owner SHANGHAI BAOYE GRP CORP
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