Construction method for overhead bridge large diameter drill hole pile in tunnel dock type structure scope
A technology for docking structures and viaducts, applied in infrastructure engineering, sheet pile walls, buildings, etc., to avoid environmental damage, ensure road traffic, and ensure construction progress.
Inactive Publication Date: 2009-07-15
SHANGHAI CONSTR NO 5 GRP CO LTD
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Problems solved by technology
[0009] The technical problem to be solved by the present invention is to provide a construction method of large-diameter bored piles for viaduct bridges within the scope of the tunnel dock structure, which can avoid the tunnel dock structure, do not cause damage to the original structure, and can reduce the construction cost at the same time. Solving the Practical Feasibility of Implementing the Viaduct Next to the Dock-type Tunnel
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[0022] Further illustrate the present invention below in conjunction with accompanying drawing.
[0023] Such as figure 2 Shown, the viaduct bridge large-diameter bored pile construction method within the scope of the tunnel dock type structure of the present invention comprises the following steps:
[0024] (1), determine the construction sequence: first construct the viaduct pile foundation away from the tunnel dock structure 1, and then construct the viaduct pile foundation 2 close to the tunnel dock structure 1;
[0025] (2) Buried casing: In order to overcome the resistance during sinking and reduce the impact on the tunnel structure, the casing is sunk by vibrating excavation method, and the steel casing is submerged in two sections by vibrating hammer to ensure that the tunnel The upper part of the pile body within the scope of the dock structure is surrounded by a steel casing; in order to avoid the deformation of the casing during the burial construction, reinforcin...
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The invention discloses a method for constructing a large diameter drilled pile of an overhead bridge in the range of a tunnel dock type structure, comprising the following steps: (1) ensuring construction sequence;(2) embedding a guard barrel: the steel guard barrel is divided into two sections to be plunged in by a vibration hammer through a vibration digging method, and reinforced hoops are additionally arranged at the upper and the lower sections of the guard barrel; (3) preparing mud solutions and arranging a circulation system; (4) carrying out the construction of hole drilling; (5) producing and installing a steel reinforcement cage: the steel reinforcement cage is sectionally produced by a pre-assembly method of clamping board formation; (6) casting underwater concrete; and (7) carrying out the operation of slip casting on the pile bottom. The method adopts the structural form of one post and one pile to change the overhead bridge foundation in the dock type structure into the form of large diameter and single post and pile, and gets rid of a bearing platform; and at the meantime, the position of a pier is moved outwards so as to cause the pile foundations to be completely positioned in the range of bicycle lanes, thereby avoiding the existing tunnel dock type structure, reducing the occupation of construction plant, and ensuring the road traffic during a construction period.
Description
technical field [0001] The invention belongs to the field of municipal bridge design and construction, and relates to a pile foundation construction method, in particular to the construction method using large-diameter bored piles for viaduct bridges under complex environmental conditions within the range of tunnel dock structures. Background technique [0002] At present, the technology adopted for the viaduct foundation on the existing soft soil foundation mainly adopts pile groups, caps, and columns, and the bored piles used are generally 600-1200mm. However, in actual construction, due to the limitation of engineering land, viaducts are often required to cross various existing railways and tunnels and other structures. For example, in a viaduct project, the piers on both sides of the viaduct on the east side are set inside the retaining wall of the original tunnel, and the columns of the piers are close to the tunnel structure. The foundation of the construction of the ...
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IPC IPC(8): E02D27/12E02D5/34E02D27/52
Inventor 滕标金少惷施其龙
Owner SHANGHAI CONSTR NO 5 GRP CO LTD