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Construction method and equipment of circular bored socketed piles

A construction method and technology of rock-socketed piles are applied in drilling equipment, sheet pile walls, earthwork drilling, etc., to improve drilling efficiency, solve construction problems, and improve hole quality.

Pending Publication Date: 2018-12-25
天津港航工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for annular drilled rock-socketed piles that can overcome the shortcomings of existing rock-socketed piles that require full-section broken rocks

Method used

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  • Construction method and equipment of circular bored socketed piles
  • Construction method and equipment of circular bored socketed piles
  • Construction method and equipment of circular bored socketed piles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like Figure 1-5 As shown, the construction method of the annular bored rock-socketed pile specifically includes the following steps:

[0035] Step 1, such as figure 1 As shown, the steel casing 1 is hoisted to the top of the construction site by lifting equipment, and the steel casing 1 is driven by the lifting piling hammer until the bottom end of the steel casing 1 reaches the top surface of the rock formation, and the steel casing 1 The setting position should ensure that the centerline of the steel casing 1 coincides with the centerline of the pile position; wherein, the steel casing 1 is a cylinder structure, and its height is greater than the depth of the soil layer at the construction location, so that the top end surface remains still after the setting is completed. a distance above the soil layer;

[0036] Step two, such as figure 2 As shown, lift away the piling hammer, set up the drilling rig, through the drill pipe 2 of each down-the-hole hammer 3, a pl...

Embodiment 2

[0044] like Figure 6~7 As shown, the annular combined down-the-hole hammer drilling equipment suitable for rock-socketed pile construction includes a drilling rig connection end 9, a steel truss 7, an annular chassis 8, a plurality of drill rods 2 and a plurality of Down-the-hole hammer 3; wherein, the connection end 9 of the drilling rig, the steel truss 7 and the annular chassis 8 are welded and fixed in sequence;

[0045] like Figure 7As shown, a plurality of interfaces 10 consistent with the number of drill pipes are evenly distributed along the circumferential direction on the annular chassis 8 and adjacent to the edge, and a connecting flange is welded at each interface 10 from the bottom of the annular chassis 8;

[0046] Each drill rod 2 is vertically arranged below the annular chassis 8, and is evenly distributed along the circumferential direction of the annular chassis 8, and the top end of each drill rod 2 is provided with the same connection flange type as that...

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Abstract

The invention discloses a construction method and equipment of circular bored socketed piles. The construction method sequentially comprises the steps of installing a steel casing, forming drilling holes with circular cross sections by adopting a plurality of down-the-hole hammers which are continuously distributed in a circular shape in a circumferential direction to drill, installing steel pipepiles along the inner wall of the steel casing, filling concrete layers in gaps of the inner and outer sides between the steel pipe piles and the drilling holes with the circular cross sections and pulling the steel casing during filling. The equipment comprises steel trusses, a circular chassis, a plurality of drill pipes and a plurality of down-the-hole hammers, wherein the steel trusses are connected in sequence from top to bottom, the plurality of drill pipes are vertically arranged below the circular chassis in the circumferential direction, the plurality of down-the-hole hammers are installed on the bottom ends of the drill pipes in a one-to-one corresponding mode, the adjacent down-the-hole hammers are staggered up and down, and the projection parts of drills on the same horizontalplane are superposed. According to the construction method and the corresponding equipment, the circular cross sections into which socketed piles can be inserted are formed by adopting the down-the-hole hammers to drill, the construction cost of large-diameter socketed piles is reduced, the drilling efficiency is high, the hole forming quality is good, and the drilling efficiency of hard rocks isobviously improved.

Description

technical field [0001] The invention relates to the technical field of rock-socketed pile construction, in particular to a construction method and equipment for an annular drilled rock-socketed pile. Background technique [0002] In the pile foundation structure, rock-socketed piles have the advantages of high bearing capacity and small settlement. Rock-socketed piles are widely used in roads, bridges, ports, wind power and other fields, and have gradually developed into large-diameter rock-socketed piles. For rock drilling, down-the-hole hammer is an effective drilling equipment. It has developed rapidly in recent years and its application fields have been continuously expanded. The construction of existing rock-socketed piles requires full-section crushing of the borehole. For large-diameter hard rock drilling, the area of ​​broken rock increases with the square value of the hole diameter. Full-section drilling will inevitably increase the rock-breaking energy of the down-...

Claims

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Application Information

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IPC IPC(8): E02D5/38E21B4/06
CPCE21B4/06E02D5/38
Inventor 张佩良何福渤米刘芳董明达丁文智陈强高永生张晓滨胡旭东肖纪生杨立红李文费文源易振张津
Owner 天津港航工程有限公司
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