35results about How to "Reduce job cycle time" patented technology

The invention provides a construction method for a soft rock deformation tunnel lining support dismantling-replacing arch. One-time whole section integral dismantling and replacing of a lining support is achieved. The construction method has the advantages that before dismantling and replacing, a lining which loses bearing capacity is subjected to grouting reinforcement treatment first, then a temporary cover arch is additionally arranged outside for reinforcement, and afterwards, the lining support is dismantled step by step, so that potential safety hazards caused by dismantling or removing of a temporary platform frame are avoided, and some security risks are avoided effectively. According to the construction method, the construction difficult problem of soft rock large deformation occurs during construction of a tunnel in special and complex geology is solved. Through the created novel construction method, the construction difficult problem of second lining cracking deformation needing remediation due to weak surrounding rock large deformation is solved. Through the construction method, safe, fast and economic treatment and remediation of the lining support and arch replacing construction are achieved, and the tunnel structure stability and construction safety are ensured effectively.

The invention discloses a large cross-section weak surrounding rock tunnel three-step and six-part short-distance construction method, which comprises the steps as follows: (1) annularly excavating an upper step of an upper part arc pilot tunnel, transferring excavated earthwork of the upper step to a lower step; (2) excavating a left part of a middle step about 4.5-5 meters behind the upper step, and transferring excavated earthwork to the lower step; (3) excavating a right part of the middle step about 3-4 meters behind the left part of the middle step, and transferring excavated earthwork to the lower step;(4) excavating a left part of the lower step about 6-8 meters behind the left part of the middle step or about 3-4 meters behind the right part of the middle step, and conveying excavated earthwork of the left part of the lower step out of the tunnel; (5) excavating a right part of the lower step about 3-4 meters behind the left part of the lower step, and conveying excavated earthwork of the lower step out of the tunnel; and (6) excavating the rest part of the tunnel bottom about 20-25 meters behind the right part of the lower step, excavating continuously according to the steps in a circulating and interlacing manner, and finally realizing tunnel excavating construction. The method can be used for building a large cross-section tunnel in a safe, rapid and economic manner.

The invention discloses an excavator bucket for preventing clay, including a built-in bucket and an external bucket, a plurality of springs are arranged in the middle cavity formed by the built-in bucket and the external bucket, and the built-in bucket is connected floatingly by the spring In the external bucket, the inside of the internal bucket is provided with a soil shaking mechanism, and the openings of the internal bucket and the external bucket are provided with seals to prevent soil from entering the middle cavity. The invention can effectively unload the soil in the bucket, reduce the working cycle time of the excavator, and increase the effective bucket capacity of the bucket.

The utility model discloses a rough-terrain wheeled crane of which all actions are driven in a full-hydraulic manner, and the rough-terrain wheeled crane can realize stepless speed change and has stable speed according to different work conditions, has the advantages of small impact, simple chassis arrangement, light complete vehicle weight, and is portable, safe and reliable in operation. The rough-terrain wheeled crane is provided with an electrohydraulic control system, a driving device and a steering device which are used for realizing fast switch among a plurality of driving modes and steering modes, thereby achieving small turning radius, fully exerting the power performances of an engine, improving the fuel oil economy and saving energy resources. The rough-terrain wheeled crane has a special underframe of an integral box type closed structure and is separately and rigidly suspended, an arc-shaped crane arm and an X-shaped telescopic support leg ensure good cross-country performance, mechanical property and working condition adapting performance of the entire rough-terrain wheeled crane during running and operating. The rough-terrain wheeled crane is convenient to maintain, and especially suitable for small construction places such as airports, oil fields, ports, wharfs, storehouses and other building sites.

The invention discloses a digging bucket. Through operation of extension and constriction of a bucket cylinder, a four bar mechanism composed of a bucket rod, a bucket body, a rocking bar and a three-point rocker arm is driven; and then through a hinge point of the bucket body and the three-point rocker arm, the other set of four bar mechanism composed of a bucket body, a three-point rocker arm, a draw bar and a scraper plate is driven so that soil loading and forced soil unloading in the process of digging are achieved. According to the digging bucket, under the working condition of digging clay, the digging bucket has special advantages. And the digging bucket is high in efficiency, reliable in performance, simple in structure, convenient to manufacture and low in cost.

The invention relates to a method for producing a container (2) from a thermoplastic, having at least one surround (4), provided in the container wall (1), for a container opening. The surround (4) comprises a structure behind which parts of the container wall (1) extend and/or which is penetrated by said parts. The method is carried out using a multi-part blow mold that has at least two mold parts, each having at least one cavity, wherein the surround is placed as an insert in the cavity (10) of the blow mold (7). The method comprises pressing the preform that has been forced into the cavity (10) into the structure of the surround (4) by means of a tool which is brought to bear on the preform (12) on the side of the preform facing away from the cavity (10).

The invention relates to the technical field of construction engineering, and discloses a method for excavating a subway station through middle steel pipe vertical columns. The method comprises the steps that after an upper step 1 and an upper step 2 are excavated, upper core soil is removed, reinforced concrete is poured on a foundation, bolts are pre-buried, steel supports are erected, the steel supports are connected with the foundation, movable heads are arranged, a square timber is erected above the movable heads, the steel supports are connected through angle iron, and after deformation is stable, the temporary steel supports are removed. The influence of perturbation on surrounding rock during blasting excavation is reduced, stress of the surrounding rock is released advantageously, construction processes are more optimized, deformation of the surrounding rock is better controlled, the defects that by adopting a traditional method, in rock column removing, the high-altitude operation safety risk exists, the construction difficulty is large, and the technology is complex are overcome, meanwhile, an upper step excavating process operation platform is fully utilized, thus the construction difficulty is lowered, construction operation is facilitated, segmented timely support is achieved, the operation circulation time is shortened, the tunnel excavating speed is effectively increased while safety is ensured, and the construction processes are reduced.

The invention discloses a full-automatic rolling device for vehicle roof panel films. The full-automatic rolling device for the vehicle roof panel films comprises a main body frame, a rolling mechanism and a sliding mechanism, wherein the rolling mechanism is movably connected on the main body frame in a liftable mode, and the bottom of the main body frame is in reciprocating sliding connection with the sliding mechanism. According to the full-automatic rolling device for the vehicle roof panel films, the problem that the man-machine labor intensity at stations is large is solved, the production efficiency is improved, the films are rolled evenly, the accuracy of the rolling positions is improved, the rolling quality stability is improved, the falling frequency of the films is reduced, andthe repair cost is reduced.