Stiffening device for bridge pier and abutment foundation and implementation method of stiffening device
An implementation method and basic technology, applied in the direction of infrastructure engineering, construction, etc., can solve the problem of weak resistance to overturning damage of open-cut foundations, and achieve the effect of short construction period
Active Publication Date: 2019-05-07
唐峰
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Problems solved by technology
[0003] The purpose of the present invention is to face the difficulties in the prior art, and propose a stiffening device for bridge pier foundations and its implementation method to solve the problem of weak resistance to overturning damage of open-cut foundations of piers and abutments commonly used in engineering
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[0029] refer to Figure 1 to Figure 3 , the present invention is a kind of implementation method that is used for the stiffening device of bridge abutment foundation, comprises the following steps:
[0030] Step 1: Drill the hole according to the predetermined position. The hole depth is the same as the depth of the screw rod, and the hole diameter is 3-15mm larger than the screw rod. The drill hole is drilled with an electric hammer impact drill, and the surface of the hole has sufficient roughness;
[0031] Step 2: Use a hard bristle brush to clean the floating skin on the hole wall, and then use an air compressor to blow off the dust and rock debris in the hole, while ensuring that the hole is dry;
[0032] Step 3: Use mortar or colloid to start injecting from the bottom of the hole until 2 / 3 of the hole is filled. After inserting the screw, the mortar or colloid will fill the entire hole;
[0033] Step 4: Slowly screw the screw into the hole to the bottom of the hole, rem...
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The invention provides a stiffening device for a bridge pier and abutment foundation and an implementation method of the stiffening device. The stiffening device comprises bolts, a steel plate and a filling material, wherein the lower portions of the bolts are bonded or glued with weathering rock mass in a matrix through filled mortar or colloid in bolt holes, the upper portions of the bolts are arranged in pier and abutment foundation concrete, and the bolts are connecting members transferring drawing force and shearing force from an upper foundation to the rock mass on the lower portion; thebolts are arranged in an array on the surface of the rock mass to form a bolt group, the steel plate is arranged in the pier and abutment foundation concrete and becomes a stiffening part of the pierand abutment foundation, the bolt group is anchor-bolted on the same steel plate, the bolt group and the steel plate form a whole load-bearing member together and jointly bear the external force transferred by a concrete foundation, on one hand, the problem that a pier and abutment open cut foundation commonly used for engineering has a weak ability to resist the overturning damage is solved, onthe other hand, the problems that pile foundation drilling on a moderately weathered rock formation is difficult and the economic cost is high are also solved, and the stiffening device is short in construction period and economical and practical.
Description
【Technical field】 [0001] The invention relates to the technical field of civil engineering construction, in particular to a stiffening device for bridge pier foundations and an implementation method thereof, which can be applied to the fields of city, highway and railway bridge construction across rivers. 【Background technique】 [0002] The bridge foundation is the lowest part of the bridge structure directly in contact with the foundation, and is an important part of the bridge substructure. A part of the stratum that bears the load from the foundation is called the foundation. After the foundation and the foundation are subjected to various loads, they will produce stress and deformation. In order to ensure the normal use and safety of the bridge, the foundation and foundation must have sufficient strength and stability. Sex, deformation should also be within the allowable range. Commonly used pier and abutment open cut foundations are generally directly located on solid ...
Claims
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IPC IPC(8): E02D27/42
Inventor 唐峰
Owner 唐峰