The hydraulic part of the rubber dam is composed of a diversion section, a paving section, a dam section, a stilling pool section and a sea diffusing section; the control part is composed of a water supply and drainage system, a control room and a management room. There is a 25m reinforced concrete aisle upstream, and a 24m reinforced concrete stilling pool and ZOm stone masonry in the downstream. The choice of anchoring structure type is in the construction and construction stage of rubber dam and the operation and maintenance of daily dam storage and water storage. Considering the construction period, safety and convenient management of rubber dam, the choice of anchoring structure type will directly affect the rubber dam project. The construction period and even the quality of the project, so its selection design and construction is the key link for the rubber dam to stabilize the water retaining effect. There are usually three types of anchoring structures, namely bolt-plate anchoring, wedge-extruded anchoring and capsule water-filling anchoring. In the plain channel and the diversion channel, bolt-type anchoring and wedge-extruding anchoring are often used. The anchoring member anchored by the bolt plate is composed of a bolt and a pressure plate. According to the way of anchoring the dam bag, it is divided into perforated anchoring and non-perforated anchoring. The piercing anchor is a hole bolt that is inserted into the pre-buried anchor bolt at the anchoring portion and anchored by the pressure plate. The design of the anchor structure is relatively simple, the construction speed is fast, the water stopping effect is good, and the construction installation and disassembly and maintenance are also convenient. Moreover, the anchoring groove of the bolt required for such anchoring is shallow and the structure is simple; the disadvantage is that the anchoring portion is to be perforated, and the periphery of the hole is to be reinforced to prevent stress from concentrating the dam bag.
However, the force in the anchoring groove is relatively complicated, and it is difficult to accurately calculate the pressing force of the anchoring groove by the wedge when the dam bag is installed. When the dam bag is inflated, the dam bag drives the wedge to rise under the action of internal water pressure. The anchor groove is subjected to multiple effects of friction and squeezing force, and the module extrusion anchoring calculation is more complicated. For the construction of the rubber dam selection module extrusion anchoring structure on the rivers and channels with high requirements such as flood control and flood discharge, the anchoring structure model test should be used to determine the specific dimensions of the anchoring groove, the pressing shaft and the front and rear wedges. The river channel treatment project in the eastern section of Anyang River is the control project on the Anyang River. The construction period of the rubber dam project restricts the construction progress of other river sections. The construction period of the whole treatment project is short, and it is also a cross-flood construction. The construction schedule of the rubber dam project must be guaranteed. Therefore, considering the impact of the design time of the rubber dam project and the difficulty of the construction period on the construction period and the convenience of management and maintenance after the completion of the project, the perforated bolt plate type is adopted. Anchored. At the same time, due to the serious pollution in the Anyang River in the past, although the water quality has been improved, the source of pollution has not been truly cut off. Therefore, the rust prevention of anchoring members should also be considered in accordance with the sewage channel.
Design of the anchoring member Once the anchoring member type of the rubber dam project is determined, the load of the anchoring bolt and the strength of the pressure plate can be calculated. The calculation of the load per unit length bolt shall take into account the strength, anchoring force, corrosion and other factors of the anchoring member. The bolt spacing shall be determined according to the adopted platen stiffness and bolt diameter. The choice of bolt anchoring construction method In the construction of rubber dam project, the pre-burial of bolts is a very important part of the whole project. The quality control of pre-embedded bolts directly affects the success or failure of rubber dam bag installation, and its construction The choice of method will have a great impact on the quality of the project and the construction period. When the anchor bolts are pre-embedded in the Cao rubber dam project, the anchor bolts are fixed by bolt pressure plates, and the theodolite is used to observe that the center line of the anchor bolts is in a straight line. And determine the height of the anchor bolt with the water meter. After confirming the error without comparison with the design requirements, fix the bolt pressure plate in the anchor groove with the wooden support. Use a long steel bar to weld the embedded parts together according to the design spacing to determine the stress of the anchor bolt. After the movement is not suitable, the anchoring groove concrete can be started.
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