49results about How to "Reduce vertical load" patented technology

A structure for preventing slippage of connecting bolts between a steel plate shear wall with a vertical seam and a frame beam. The upper and lower ends of the main steel plate with vertical seams are provided with bolt holes for connecting with the upper and lower frame beams, and the bolt holes at the corners of the upper and lower ends of the main steel plate with vertical seams are provided. The arrangement density and the number of rows are larger than those in the middle part; the edges of the main steel plates with vertical seams are stiffened to form a closed system. The present invention adopts a targeted layout form for the bolts connecting the steel plate shear wall with slits and the frame beam, and adopts a closed edge stiffening system at the same time, which overcomes or delays the occurrence of bolt slippage and eliminates the bolt slippage caused by bolt slippage. noise, and avoid the great loss of the good seismic performance of the steel plate shear wall with slots caused by the slippage of the bolts, to ensure that the steel plate shear walls with slots are fully bolted on site so that they can be disassembled and replaced after earthquake damage, and to avoid steel plates with seams Shear walls are subjected to excessive vertical loads. The closed edge stiffening system also solves the corner instability problem of the slotted steel plate shear wall that induces or aggravates bolt slippage.

The invention discloses a pipe burying structure capable of reducing pipe top vertical loads and a construction method for the pipe burying structure. The construction method comprises the steps of S1, digging a pipe groove and a backfill groove above the pipe groove and digging at least one step on two side walls of the backfill groove; S2, laying pipes in the pipe groove and completing port welding of the pipes; S3, filling earth in the pipe groove, and compacting and flattening the filled earth to the pipe top elevation; S4, laying a degradable material interlayer above the top of the pipe, wherein the degradable material interlayer is disposed below a transverse step plane of the lowest layer of steps; S5, filling earth into the backfill groove and compacting the earth. According to the pipe burying structure and the construction method for the pipe burying structure, an soil arch effect and backfill groove side wall friction can be used for obviously reducing the top pressure of the pipes, and the pipes are protected from being fractured and damaged. The construction process is simple, costs of used materials are low, and the construction method has a good application prospect and a wide generalization performance and applicable to open digging burying of underground shallow buried pipes.

The invention relates to a gas-fired hot water boiler air circulation energy saving system which comprises a boiler body, two burners, a flue, a chimney, energy savers, a water-cooling type condenser, a secondary air type condenser and a primary air type condenser, wherein the two burners arranged at intervals in an up-and-down manner are mounted at one end of the boiler body; a flue gas outlet is formed at the other end of the boiler body, and is in sealing connection with the flue; an outlet of the flue is connected to the upright chimney; the energy savers sequentially arranged in a two-stage manner are mounted in the flue between the boiler body and the chimney; the chimney is provided with the water-cooling type condenser, the secondary air type condenser and the primary air type condenser from bottom up sequentially; an air blower is communicated with and mounted at one side of the lower part of the chimney; and an exhaust outlet of the air blower is communicated with air inlets of the burners of the boiler body through sealed pipelines. The gas-fired hot water boiler air circulation energy saving system operates stably, is safe and reliable, has strong output, is high in efficiency and low in exhaust gas temperature, reaches flue gas emission indexes, and meets the requirements of market development better.

The invention relates to a structural part of a sanitation truck, in particular to a liftable sucker mechanism of a dust collection vehicle. The liftable sucker mechanism of the dust collection vehicle comprises ascending / descending drive mechanisms, a sucker body and an auxiliary walking mechanism; the ascending / descending drive mechanisms are mounted on a chassis beam, the drive ends of the ascending / descending drive mechanisms are arranged downwards and connected with the sucker body through connection pieces, the auxiliary walking mechanism is fixed to the chassis beam and located on the front side of the sucker body in the walking direction, and the sucker body is connected with the auxiliary walking mechanism. The liftable sucker mechanism of the dust collection vehicle has the advantages that the mechanism is simple in structure and convenient to operate and use, and the sucker device is hung flexibly, so that when the sucker meets a highly protruding obstacle, the collision force can be effectively buffered, collision force is dispersed to a large degree, the situation that the sucker is collided and damaged is avoided, good traction force is achieved, and stability of the sucker in the dust collection process is maintained.

The invention discloses a steel column concrete root deep water foundation structure and a construction method for the steel column concrete root deep water foundation structure. The steel column concrete root deep water foundation structure comprises an upper steel column and lower concrete roots, wherein the upper steel column is internally hollow, the diameter of the upper steel column is 3.2 mor above, and the bottom of the upper steel column goes deep to be below the local scour line of the seabed; and the lower concrete roots are provided at least three and of solid structures, the diameter of each lower concrete root is 0.8-2.5 m, and the lower concrete roots are arranged inside the upper steel column, the upper ends of the lower concrete roots are fixedly connected with the innerwall of the upper steel column through a first cushion cap, the first cushion cap is above the seabed surface, the lower end of the upper steel column is fixedly connected with the outer walls of thelower concrete roots through a bottom seal segment, and the bottom seal segment is formed by pouring concrete. The steel column concrete root deep water foundation structure is simple in constructionand reasonable in force bearing, has the excellent horizontal bearing capacity, further has the reliable vertical bearing capacity and gives full play to the mechanical properties and advantages of different materials, the use amount of basic materials is saved, the construction cost of deep-water foundation in harsh deep-sea environment is lowered, and the steel column concrete root deep water foundation structure and the construction method for the steel column concrete root deep water foundation structure are suitable for the marine engineering deep-water foundation with deep water and fastflow, long and high wave, severe scour and deep covering layers.