Construction method of long auger drilling concrete-grouted back-plugged profile steel piles
A technology of long auger drilling and pouring concrete, which is applied in the direction of sheet pile walls, foundation structure engineering, construction, etc., which can solve the problems of low construction efficiency, large site occupation, and hole gaps, and achieve simple construction procedures and small construction site occupation , high work efficiency
Active Publication Date: 2013-01-02
泛华建设集团有限公司
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Problems solved by technology
[0003] In order to overcome the disadvantages of the existing construction method of inserting reinforcement cages after long auger drilling and grouting concrete, the reinforcement cages cannot sink to the design position during the construction of small pile foundations, and gaps between holes are easy to form, the construction efficiency is low, and the site occupation is large. The invention proposes a construction method for post-inserted steel piles. This method has simple construction procedures, convenient construction, good pile quality, environmental protection, and no mud pollution
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[0026] See implementation legend Figure 1 to Figure 8 .
[0027] exist figure 1 The mid-length auger rig 1 is shifted and centered, and the center of the long auger rod is controlled to be centered with the center of the pile.
[0028] exist figure 2 The middle and long auger drilling rig 1 drills holes to the design elevation.
[0029] exist image 3 The middle-length auger rig 1 pumps concrete to the top of the pile while rotating the hole, and overfills a part of the concrete.
[0030] exist Figure 4 In the middle, connect the manufactured section steel pile 3 with the vibration connection device 2, connect the flange plate 2.1 of the vibration connection device 2 with the spring vibrating hammer 6, use a crane to lift it, and then center and sink the section steel pile.
[0031] exist Figure 5 The medium-sized steel pile is sunk to the design position, the T-shaped bayonet is removed, and the pile is formed.
[0032] exist Figure 6 Make the vibration connecti...
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The invention relates to a construction method of long auger drilling concrete-grouted back-plugged profile steel piles. The method mainly comprises the following steps: drilling holes by using a long auger drilling machine and taking soil; drilling to the designed depth, and grouting concrete; manufacturing a back-plugged profile steel component, processing a circular hole with the diameter of 5cm at a position which is 5cm away from the top of an I-bar, manufacturing a T-shaped plug by using a steel bar with the diameter of 14mm, connecting the profile steel with a vibration connector by using the T-shaped plug, and coiling the flange of the lower part of the profile steel inwards by 60 degrees; connecting a profile steel pile with the vibration connector, lifting and centering; sinkingby utilizing the dead weight of the profile steel pile in the early stage, and after sinking to a certain depth, starting a spring vibration hammer until the profile steel pile sinks to the designed position under the action of vibration, wherein in the construction process, special persons are designated to control the verticality by using two theodolites and control the top height by using a balance level; and dismantling the connector to obtain the pile. By utilizing the construction method, the quality problem in foundation ditch slope-protection support pile construction in a narrow space is solved, and the problems that the back compressed steel bar cage of small-diameter pile foundations can not sink to the designed position and voids can be easily formed are also solved. The construction method provided by the invention has the advantages of less working procedures and small occupied construction site.
Description
Technical field [0001] The invention relates to a pile foundation construction of long helical drilled concrete pouring piles, in particular, it is suitable for foundation pit support and slope protection piles with a narrow construction site and a pile diameter of less than 400 mm. Background technique [0002] At present, the commonly used construction method is the construction method of inserting reinforcement cages after pouring concrete with long auger boreholes, and the invention patent "Construction Technology of Inserting Reinforcement Cages and Inserting Reinforcement Cages after Pumping Concrete into Pile with Long Auger Drilling Holes" (Application No. 200310101954.3), For pile foundations with a diameter less than 400mm, the rigidity of the reinforcement cage is small, and the deformation resistance of the reinforcement cage is poor. A special pile feeder is used for construction. The pile feeder is basically as long as the reinforcement cage. Pulling out the pi...
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IPC IPC(8): E02D7/18E02D5/28
Inventor王鹏谭利华王瑞清张鹏飞葛斌斌余兰
Owner泛华建设集团有限公司