Construction method of precast pile in thick-slag-stone-layer field
A construction method and technology of prefabricated piles, applied in the direction of sheet pile walls, foundation structure engineering, construction, etc., can solve the problems that can not be solved in thick slag and stone layer sites, use prefabricated piles, etc., achieve great promotion value, strong practicability, and construction The effect of stable quality
Active Publication Date: 2014-08-27
JIANGSU NUCLEAR POWER CORP
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[0003] The purpose of the present invention is to provide a construction method for prefabricated piles in thick slag and rock layers, so as to overcome the shortcomings of using prefabricated piles in thick slag and rock layers.
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[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] Such as figure 1 Shown, a kind of prefabricated pile construction method of thick slag rock layer site of the present invention, the steps are as follows successively:
[0029] (1) Excavate all the slag above the level of the bottom of the platform. The level indicates the vertical height of a certain part of the building relative to the datum level, which is the basis for vertical positioning. The datum level here is the bottom of the platform;
[0030] (2) a. When the thickness of the slag layer (including the excavated slag above the cap bottom level in step (1)) is less than or equal to 5 meters, skip to step (3) for the case of single pile and two pile caps );
[0031] b. When the thickness of the slag layer is less than or equal to 5 meters, for the caps of three piles or more than three piles: Excavate all the remainin...
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The invention relates to the technical field of the industrial and civil buildings, in particular to a construction method of precast pile in thick-slag-stone-layer field. The method comprises steps of: (1) digging and removing all slag above the reference height of the bottom of a pile cap; (2) when the thickness of the slag layer is not more than 5m, for situations of single pole and two poles, punching to the raw soil layer under the slag stone layer and then backfilling, for situations of three piles or more, digging and removing all remaining slag stones under a pile cap, removing the slag stones with large grain sizes, mixing the remained slag stones with small grain sizes with clay and backfilling the pit; when the thickness of the slag layer is more than 5m, digging and removing 2-3m remained slag under the pile cap, removing the slag stones with large grain sizes, mixing the remained slag stones with small grain sizes with clay and backfilling the pit; punching to the raw soil layer under the slag stone layer and backfilling; and (3) if a large stone with one end in the hole and the other end outside the hole is found, re-punching and backfilling to ensure that no large stone exists, and then sinking the precast pile in place. The method is unlimited by soil layers of the fields and underground water level, and is suitable for various slag stone layer fields.
Description
technical field [0001] The invention belongs to the technical field of industrial and civil buildings, and in particular relates to a construction method for prefabricated piles on a site with thick slag and stone layers. Background technique [0002] Prefabricated piles, especially prestressed pipe piles, are widely used in general industrial and civil construction projects because of their high fatigue strength, high bearing capacity, economy, and fast construction speed. At present, when domestic seaside nuclear power plants are connected to one another, landfill debris is dumped on the beach to form a backfill site. The prefabricated piles on such a site cannot pass through, which was once considered a restricted area for the use of prefabricated piles. Using traditional perforated piles, the construction period is long, the quality is difficult to control, and the proportion of basic investment is high. Contents of the invention [0003] The purpose of the present in...
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IPC IPC(8): E02D7/00
Inventor 韦松余申彦锋崔方水宋明烨顾磊
Owner JIANGSU NUCLEAR POWER CORP