41results about How to "Increase the construction work area" patented technology

The invention relates to a method for constructing a double-arch tunnel by rebuilding and expanding an existing single-hole tunnel. The technical problem to be solved by the invention is to provide a method for constructing the double-arch tunnel by rebuilding and expanding the existing single-hole tunnel, which adopts a ' middle pilot hole, the existing tunnel and a right hole' three pilot pit construction scheme, enlarges construction face and reduce excavation face and surrounding rock disturbed zone. To solve the technical problem, the invention adopts a technical scheme that the method for constructing the double-arch tunnel by rebuilding and expanding the existing single-hole tunnel comprises the following steps: 1.1 constructing the middle pilot hole parallel to the existing single-hole tunnel on one side of the existing single-hole tunnel and completing supporting construction; 1.2, constructing a left hole by sequence and zone on the basis of the existing single-hole tunnel and communicating the left hole and the middle pilot hole; and 1.3, after excavating the left hole to a certain size, constructing the right hole by sequence and zone and communicating the right hole with the middle pilot hole. The method is mainly used in highway traffic engineering and municipal traffic engineering.

The present invention relates to a one time supporting arch subsurface excavation reversed construction method. The steps of the method are as follows: at least a pair of upper guide hole and lower guide hole are respectively excavated in a top body and a bottom body corresponding with an underground structure design space; each pair of guide holes forms one span; then the hole wall is processed for primary supporting; the bottom of the lower guide hole is laid with a waterproof layer; the waterproof layer is casted with an underlayer frame structure soleplate; a slope stake and a middle upright post are constructed from the upper guide hole; the arc top of the upper guide hole is laid with the waterproof layer, and an arc top permanent structure is cast; then a midspan soil body is excavated between two upper guide holes by a subsurface excavation method to form a midspan upper guide hole and to be constructed as a midspan upper guide hole arc top permanent structure; the primary support at the bottom of the upper guide hole is chiseled and removed; a soil body is excavated downwards, and a structure lateral wall and a middle floor slab are cast; the rest partial solid between the primary support at the top of the lower guide hole and the middle floor slab is excavated, at the same time, the primary support at the top of the lower guide hole is chiseled and removed, the rest lateral wall structure is cast, and an even span structure soleplate is closed. The method has small construction risk, large construction field and fast construction speed, uses few big guide holes and solves the technical problems of the large amount of the guide hole, the small size of the guide hole, small construction space, multiple times of structure stress conversions, the repeated perturbation of wall rock, etc of the traditional subsurface excavation method.

The invention discloses a rigid grid and pile composite foundation and a method applied to reinforcing soft soil foundation. The rigid grid and pile composite foundation comprises a precast pile or a cast-in-situ pile, a rigid grid structure, a tensioning net, tensioning ribs and a transitional underlayer; the precast pile or the cast-in-situ pile drives to a relatively hard ground layer from a foundation surface layer; the rigid grid structure is fixedly connected with the precast pile; the grid structure is paved with the tensioning net; the tensioning net is provided with the transitional underlayer; the transitional underlayer is tightly contacted with the foundation surface, and the thickness of the transitional underlayer is between 0.6 and 1.5 meters; and the transitional underlayer is sandy clay, gravel soil or plain concrete with crude particles. The invention organically combines the rigid grid and the pile structure, the transitional underlayer and a soft ground layer to construct a composite foundation, transfers the load to a deep layer soil body through the grid structure and a pile, can give a full play to the strength and the deformation performance of the deep layer soil body, thereby effectively improving the foundation strength and the deformation performance, and having good reinforcing effect.

The invention discloses a method for lifting and installing a whole bridge arch rib. The method includes the following steps of dividing the arch rib into two side arch rib bodies and a middle arch rib body, splicing the side arch rib bodies on a wharf, hoisting the side arch rib bodies to a set position through a floating hoist, erecting a side supporting system and a lifting portal, installing a lifting system, splicing a middle supporting system below the design position of the middle arch rib body, installing the middle arch rib on the upper face of the middle supporting system, arranging a temporary beam at the bottom of an arch foot of the middle arch rib body, arranging a temporary horizontal rope between the two ends of the arch foot, correspondingly connecting the lifting system with the temporary beam, and lifting, horizontally moving, putting down, putting in position, folding and installing the whole middle arch rib body. By means of the method, the requirements for installation quality and precision of the large-span arch rib bridge can be met, section lengths can be flexibly adjusted, section manufacturing quality is optimized, and section in-situ precision is improved.

The invention discloses a construction method of a main beam of a steel-concrete composite beam cable-stayed bridge. The construction method comprises the steps: a wall-attached crane is mounted on acable tower, and initial section steel beams are hoisted by the wall-attached crane and fixed; the wall-attached crane hoists a first deck crane onto the initial section steel beams, unit splicing section steel beams are hoisted by the first deck crane and fixed to the two ends of the initial section steel beams, the first deck crane moves forwards onto the unit splicing section steel beams at oneends of the initial section steel beams, and the wall-attached crane hoists a second deck crane onto the unit splicing section steel beams at the other ends of the initial section steel beams; and the first deck crane and the second deck crane move forwards to splice the steel beams extending towards bridge side-span sections and the steel beams extending towards bridge mid-span sections and close the steel beams on the side-span sections and the steel beams on the mid-span sections. The construction method has the advantages of being high in operability, safe, reliable, controllable in quality, economical, efficient, capable of saving energy and protecting the environment and the like.

The invention provides a vertical shaft construction device and a method, and belongs to the field of foundation engineering construction. The device comprises a ring beam, supports, a support system and floating prevention structures, wherein the ring beam is arranged in a soil body above a tunnel; the supports are applied to the side walls of a vertical shaft; the support system is a multilayer structure, and comprises a steel support structure and a middle separation plate structure arranged in the vertical direction; the support system is perpendicular to the length direction of the vertical shaft, and is fixedly connected with the supports at the two sides of the vertical shaft; and the floating prevention structures are positioned at the upper side and the left and right sides of the tunnel. The span of the vertical shaft is small, the device is provided with the multilayer support system, and the vertical shaft construction device is strong in structure, so that the pressure of soil bodies at the two sides of the tunnel can be preferably transferred, the interference on the soil bodies around the subway tunnel is little, and the swell quantity of the tunnel can be effectively controlled to satisfy the design requirement. In addition, the symmetric parallel operation can be adopted to synchronously construct and install the device on multiple working surfaces, so that the construction period is reduced.

The invention discloses a down-adjusted 7m coke oven regenerative chamber constructing method. The method comprises the following steps: firstly, alternately constructing main wall, single wall, small flue lining bricks and grating bricks of a small flue construction section according to construction section and construction order; and then, alternately constructing main wall, single wall, down-adjusted hole adjusting bricks, checker bricks, partition and enclosing wall of a regenerative chamber construction section according to construction section and construction order until reaching the top of a regenerative chamber. Therefore, the constructing method can expand a construction working surface, guarantee constructing quality, facilitate quality inspection, improve working efficiency, improve the working environment of workers and avoid dust pollution to the environment.

The invention provides an excavation method of a barrier lake aerial drainage tunnel. The excavation method of the barrier lake aerial drainage tunnel is characterized in that small space excavation is sectionally adopted, a large tunnel is formed by a manner of successive jacking in sections, at the same time, the top end and the two side ends of each section of the tunnel are continuously strengthened and supported according to successive jacking, and a steel body of each section of the tunnel is formed after strengthening and supporting; during aerial drainage, water constantly scours the bottom surface of soil mass, the bottom surface of the tunnel is hollowed out, the steel body of each section of the tunnel decreases continuously with the bottom surface of the soil mass, and the barrier lake aerial drainage height is further decreased; and the starting position of small space excavation is set in the unilateral direction or bilateral direction of a barrier lake or in a middle open caisson, construction of the open caisson is carried out in one-direction or two-direction manner, and a flow control device is arranged in the steel body of the aerial drainage tunnel or the open caisson. According to the excavation method of the barrier lake aerial drainage tunnel, the earth excavated volume is greatly decreased, the working face is increased by setting the open caisson on anexcavation line, the excavation length of each working face is greatly shortened, and it is conducive to start the aerial drainage and remove danger work in a very short time.

The invention relates to an inner double circulation runner type stretchable pitch sprinkling device which mainly comprises a support frame, a fixed sprinkling rod component, a left stretching sprinkling rod component and a right stretching sprinkling rod component which are the same in structure, and a pitch sprinkling valve, wherein the fixed sprinkling rod component is mounted on the support frame; each of the left stretching sprinkling rod component and the right stretching sprinkling rod component comprises a primary pitch pipeline, a secondary pitch pipeline, a rotating joint, a side sprinkling pipe and a pitch sprinkling valve; each primary pitch pipeline, each secondary pitch pipeline and each side sprinkling pipe are all divided into an oil inlet channel and an oil return channel by separating plates; an inner flowing pipe with smaller diameter is arranged in each rotating joint; and a transmission gear is driven by a hydraulic motor which is mounted on the support frame and a transmission rack fixedly arranged on the left stretching sprinkling rod component and the right stretching sprinkling rod component is driven to do linear motion, so that expansion and retraction of the left stretching sprinkling rod component and the right stretching sprinkling rod component are realized. Without using an externally connected pipeline, the inner double circulation runner type stretchable pitch sprinkling device can realize pitch circulation; the sprinkling distributing width is wide; and the structure is simple.

The invention discloses a construction method of a large floating maintenance door. The method comprises the following steps: (1) a first beam body, a second beam body, a third beam body, a fourth beam body, a fifth beam body and a sixth beam body are assembled; (2) a truss is assembled; (3) edge columns are assembled; (4) a maintenance door lower half body is manufactured; (5) a fender is assembled on the truss to manufacture a maintenance door middle body; (6) a maintenance door upper half body is manufactured; (7) a whole maintenance door is manufactured; (8) the edge columns are mounted onthe whole maintenance door; (9) the corrosion-resistance treatment is performed on the whole maintenance door; and (10) the construction of the large floating maintenance door is finished through assembly and welding. The construction method of the large floating maintenance door can solve the problems of assembly and corrosion resistance of the large floating maintenance door, is simple, feasible and convenient for corrosion-resistance construction, and greatly reduces the tonnage requirements on lifting equipment.

The invention discloses a multifunctional folding fabricated operating platform. The multifunctional folding fabricated operating platform is composed of hanging pedestals, bearing frames, connectingrods, adjustable supporting frames, a fence, an operating platform body, plugs and the like. During construction such as building construction, bridge pier stud construction, various kinds of cast-in-place construction, beam and slab prefabricated construction, steel and concrete superposed beam construction or construction of other cantilever structures, the folding fabricated operating platformis connected at a butt joint position through the different hanging pedestals, construction working faces are increased, the operation is facilitated, the construction speed is increased, the safety is good, transportation is convenient, the turnover performance is high, and economic benefits and social benefits are obvious.

The invention discloses an inserting type beautifying tower which comprises a first rod segment, a second rod segment, a third rod segment, a fourth rod segment, a fifth rod segment and a sixth rod segment. Adjacent rod segments are connected in an inserting mode. The beautifying tower is connected with a foundation through foundation bolts. The beautifying tower comprises a beautifying platform and a beautifying cover. The beautifying platform is arranged on the fifth segment, the beautifying cover is arranged on the sixth segment, and the beautifying cover covers an antenna. Compared with the prior art, the inserting type beautifying tower has the advantages that disputes and contradictions in construction are avoided, the construction speed is high, and the inserting type beautifying tower is safe to use.