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High-intensity prestressed concrete tubular pile lead hole hammering construction method for soft soil layer

A construction method and prestressing technology, applied in sheet pile walls, foundation structure engineering, foundation structure tests, etc., can solve problems such as inability to transport roads, large volume and weight of static pressure pile machines, and prone to machine sinking, etc., to achieve Save money, shorten the construction period, and improve the effect of shear resistance

Active Publication Date: 2012-06-06
PINGMEI SHENMA CONSTR ENG GROUP
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Problems solved by technology

When the construction site is a soft soil layer, it is prone to machine sinking; at the same time, the static pressure pile machine has a large volume and weight, and in field construction, there is no regular hardened road and cannot be transported; Pipe pile construction method is not suitable for soft soil layer

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  • High-intensity prestressed concrete tubular pile lead hole hammering construction method for soft soil layer
  • High-intensity prestressed concrete tubular pile lead hole hammering construction method for soft soil layer
  • High-intensity prestressed concrete tubular pile lead hole hammering construction method for soft soil layer

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Embodiment Construction

[0024] According to the construction sequence, the high-strength prestressed concrete pipe pile pilot hole hammering construction method in the soft soil layer of the present invention includes measurement and positioning, long auger drilling machine pilot hole construction, guide rod type diesel hammer pile driver construction, hoisting into the steel cage and pouring concrete, etc. Four steps to comply with the requirements of specific engineering design in specific construction.

[0025] The measurement and positioning step is to use the total station to determine the specific pile position control point on the basis of GPS positioning (the pile position control point is mainly located at the corner of the operation route) and pour concrete protection at the control point; finally, use theodolite and A 50m steel ruler is used to locate each pile position to prevent the pile from being damaged; set up no less than 2 control piles and benchmarking points near the piling const...

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Abstract

The invention discloses a high-intensity prestressed concrete tubular pile lead hole hammering construction method for a soft soil layer. The method comprises the following construction steps of: measuring and positioning; performing lead hole construction by using a long twist drill; and constructing by using a guide-rod diesel hammer pile driver. The construction method solves the problems of low earth surface bearing capacity, inconvenient construction machinery, material processing and transportation, serious influence of weather and the like existing on a construction site. A pile foundation is manufactured without cast-in-place concrete, so that the defect of reaching design required intensity of a concrete pile foundation by waiting for about a month is overcome; and gas shielded welding is performed between pile sections, so that the shearing resistance of a weld position is enhanced. After all, the construction method fulfills the aims of shortening construction period, saving money and ensuring engineering quality and is particularly suitable for construction of soft soil layers with poor bearing force and prestressed tubular piles with earthquake-proof intensity of lower than grade 7. Of course, the construction method is widely applicable to construction of other floor civil buildings.

Description

technical field [0001] The invention relates to a soft soil layer pile foundation construction method. Background technique [0002] Existing soft soil layer pile foundation construction method comprises following construction procedure: [0003] 1. Long auger drill hole construction; [0004] 2. The construction of hoisting the reinforcement cage into the hole; [0005] 3. The construction of pouring concrete. [0006] Although this construction method is reliable, the construction efficiency is relatively low, especially after pouring the concrete, it takes about one month to make the concrete pile foundation reach the strength required by design. [0007] In recent years, with the rapid development of the power industry, the emission of fly ash has increased dramatically. The total amount of fly ash emitted by coal-fired thermal power plants has increased year by year and accumulated, forming the fly ash formation on the project site. The fly ash formation is gray or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D7/06E02D5/58E02D33/00E02D27/32
Inventor 张永忠张水来牛超群卢琦赵永宽高廷甫方会珍张云昭
Owner PINGMEI SHENMA CONSTR ENG GROUP
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