A design method of pile group combined anchorage suitable for large-tonnage cable crane
A technology of cable crane and design method, which is applied in the direction of sheet pile wall, building, foundation structure engineering, etc., can solve the problems that the horizontal bearing force cannot fully meet the needs of the project, construction inconvenience, cost increase, etc., and achieve significant economical and Applicability, optimal force, effect of reducing quantity
Active Publication Date: 2017-09-22
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is: for large-tonnage cable cranes, the horizontal load-bearing strength of the conventional pile group combined anchorage cannot fully meet the requirements of the project, and it is necessary to increase the total horizontal load-bearing capacity by increasing the engineering quantity of the pile group foundation Force, thus causing construction inconvenience and cost increase
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[0031] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0032] Such as figure 1 As shown, the combined pile group anchorage includes a pile group foundation 10 and an additional auxiliary prestressed anchor cable 20, and the main cable 30 of the cable crane (not shown in the figure) is connected as a whole with the pile group foundation 10 through an anchoring structure. The anchoring structure includes an anchor box 40 and an embedded part 41 , and the anchor box 40 is anchored on the pile group foundation 10 through the embedded part 41 as a connecting piece between the pile group foundation 10 and the main cable 30 .
[0033] The invention provides a pile group combined anchorage design method suitable for large-tonnage cable cranes, combining figure 2 , before the main cable 30 is anchored, after the prestressed anchor cable 20 is stretched for the first time, the reaction force on the pile group foundation 10 is op...
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The invention discloses a design method for a pile group assembled anchor suitable for a large-tonnage cable crane. The design method comprises the following steps that 1, horizontal bearing force Rs needing to be provided by the pile group assembled anchor and the horizontal bearing force Rp of pile group foundations are determined, and a prestress anchor cable is tensioned for the first time; 2, the maximum horizontal bearing force Rm needing to be provided by the pile group assembled anchor is determined according to the maximum horizontal force Hm of a main cable of the cable crane in the worst hoisting state, and the prestress anchor cable is tensioned for the second time; 3, Rs is compared with the horizontal bearing force Rp of the pile group foundations, and the conditions needed for horizontal force anchoring of the main cable in a self-gravity state are determined; and 4, based on the working conditions obtained after the cable crane is mounted, the conditions needed for horizontal force anchoring of the main cable in the maximum hoisting state are determined. The comprehensive horizontal bearing force of the pile group assembled anchor is increased to be four times the horizontal bearing force of the pile group foundations to the maximum extent, and on the premise of not changing anchoring force, the number of the pile group foundations can be effectively reduced.
Description
technical field [0001] The invention relates to a design method for pile group combined anchorage, in particular to a design method for pile group combined anchorage suitable for large-tonnage cable cranes. Background technique [0002] The common pile group combined anchorage is generally an auxiliary prestressed anchor cable added to the pile group foundation to achieve the purpose of improving the horizontal bearing capacity of the pile group foundation. Its structure is mainly composed of two parts: the pile group foundation and the prestressed anchor cable. During the prestressed anchorage construction, the prestressed anchor cable will generate a large horizontal load on the pile group foundation opposite to the anchoring force direction of the main cable. Due to the limited horizontal bearing capacity of the pile group foundation, the comprehensive level of the combined pile group anchorage The maximum bearing capacity shall not exceed 2 times the horizontal bearing c...
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IPC IPC(8): E02D5/74E02D27/14E02D27/44
CPCE02D5/74E02D27/14E02D27/44E02D2250/0046
Inventor 刘玲晶陈治任刘翠云潘东发季跃华王跃年李艳哲马涛毛伟琦涂满明刘志燕梁伟
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD