36results about How to "Solve construction technical problems" patented technology

The invention relates to a method for constructing an inclined shaft by applying a TBM (Tunnel Boring Machine) with an earth pressure balancing function, wherein the method comprises the following steps: (1) judging the position of a waterproof layer in the front of TBM construction before carrying out TBM tunnelling construction; (2) drilling by utilizing an advanced detecting/grouting drilling machine to carry out underground water pre-discharging construction; (3) carrying out continuous downhill tunnelling construction by utilizing an inclined shaft TBM method; (4) conveying the air volume required for TBM construction to the last ring of lining segment of TBM construction equipment; (5) carrying out inclined shaft counter-slope underground water pump drainage; (6) carrying out long-distance large-gradient material transportation and deslagging; and (7) carrying out conversion construction in two tunnelling modes including a single shield TBM opening manner and an earth pressure balanced shielding manner. The method disclosed by the invention has the advantages of being short in construction period, rapid in speed, simple in operation and low in cost; simultaneously, the adaptability to stratum characteristics contains hard rocks and soft rocks; the geological application range of equipment is expanded; and the construction risks can be effectively lowered.

The invention discloses a method for steel sheet pile cofferdam construction in a deepwater thick-sludge-layer environment. In construction, four guide steel pipe piles are inserted into the inner side of a supporting ring beam, first inner supports are placed on the guide steel pipe piles to serve as steel plate pile guide frames, the long and short steel sheet piles are inserted alternately andwelded to the first layer of inner supporting ring beam one by one, and building-in stability of a cofferdam in sludge can be improved by the aid of inner supporting auxiliary steel pipe piles and long steel sheet piles. After closure of the steel sheet pile cofferdam, steel pipe piles are inserted around the outer side of the cofferdam to realize supporting assistance. By a combined sludge suction pump and a telescopic boom grab bucket, sludge suction and dredging to bottom-sealing bottom elevation and pouring of underwater bottom sealing concrete can be realized, and the problem of low efficiency of a traditional air compressor reverse circulation sludge suction process under thick-sludge-layer geological conditions is solved. Plastic thin film strips are hung and filled in an outer sealing gap of the steel sheet pile cofferdam from top to bottom, the thin films are plugged into the sealing gap along with water flow under pressure difference resulted from pumping in the cofferdam, and accordingly water stop effects are achieved.

The invention discloses a lifting device for building curtain wall construction with the advantages of simple structure, capacity of moving back and forth and high safety and a construction method thereof. The lifting device comprises a vertical support which is vertically mounted on a building main body, wherein a horizontal overhang main beam is mounted at the upper end of the vertical support along the horizontal direction; a traveling device is movably mounted at one end, which is far away from the vertical support, of the horizontal overhang main beam; traveling wheels are arranged on the traveling device; and the traveling device moves on the horizontal overhang main beam along the horizontal direction by virtue of the traveling wheel. According to the invention, the limitations that construction of a scaffold is unreasonable in economy and the construction is difficultly performed by using a common basket are overcome. Meanwhile, the lifting device disclosed by the invention is high in repeated utilization rate, the cost is saved, the mechanical property is good, the construction efficiency of a special curtain wall is greatly improved, and the high-altitude construction safety is guaranteed.

The invention provides a treatment method for annularly continuous bead-like karst caves of a tunnel. The method comprises steps of execution of emergency treatment measures, primary support treatment of vault caves, primary support treatment of left-skewback caves and primary support treatment of right-hance caves. The treatment method for the annularly continuous bead-like caves of the tunnel is safe, reliable, scientific, feasible, convenient to construct, economical and reasonable, solves the technical problems in construction of the bead-like caves while the construction duration is short, provides reference for follow-up similar cave treatment especially treatment of the vault caves, and realizes the effects of saving time and labor and facilitating construction.

The invention relates to a large-span box-shaped variable-section reinforced concrete arch construction method, comprising the steps as follows: after the foundation construction is completed, an arch springing bearing platform is formed by concrete pouring on the foundation; subsequently, an arch body supporting frame foundation construction is carried out; on the foundation of the arch body supporting frame, the arch body supporting frames are symmetrically arranged between two arch springings; on the arch body supporting frame, arch body external formwork bottom plates are symmetrically arranged from two ends of the arch springings to the center of the arch body at the same time; the bottom reinforcement of the arch body is binded on the upper surface of the external formwork bottom plate; subsequently, the arch body formworks are installed; the concrete is poured by sections from the two ends to the middle of the arch simultaneously; finally, the concrete used for sealing the arch is poured; when the formworks are removed, the formworks are removed symmetrically from the center to the two ends of the arch springing simultaneously; finally, the concrete curing of the arch body is carried out. The construction method of the invention solves the construction technical problem of large-span reinforced concrete hollow variable-section arch.

The invention discloses a construction method of a pile breaking head of a cast-in-place pile, an auxiliary isolation net and a preparation method of the auxiliary isolation net. According to the method, a plurality of plastic pipes with different diameters are nested, and then the plastic pipes are fixed through radial reinforcing bars to form the auxiliary isolation net; in the concrete pouringprocess of the cast-in-place pile construction, when concrete is poured to the position of the design elevation, the auxiliary isolation net is fixed on a reinforcing cage at the position of the design elevation; concrete is continued to be poured until the pile breaking head is poured; and after the concrete of the cast-in-place pile is solidified and reaches a pile breaking state, the concrete above the auxiliary isolation net is struck by using a pile breaking machine, the pile head above the design elevation is broken down, and the construction of the pile breaking head of the cast-in-place pile is completed. The auxiliary isolation net has the advantages of simple structure, high practicability, low cost and good use effect; and therefore, the construction efficiency can be obviouslyimproved in the process of the pile breaking head of the cast-in-place pile, the damage to a main pile body in the process of breaking the pile can be greatly reduced, and the related construction technical problems in the process of the pile breaking head can be solved.

The invention discloses a combined protective slope. The combined protective slope mainly comprises a lower blanket zone positioned at a river embankment blanket and an upper blanket zone positioned on a river embankment slope top as well as a protective slope main body which spreads along the river embankment slope surface and is used for connecting the upper blanket zone to the lower blanket zone, wherein reverse-filtration non-woven geotechnical cloth spreads between the protective slope main body and the river embankment slope surface. The invention further discloses a construction methodof the combined protective slope, and the construction method comprises the following steps of: pouring the lower blanket zone on the site on the bottom of the river embankment slope surface, and pouring the upper blanket zone on the site on the top of the river embankment slope surface; spreading the reverse-filtration non-woven geotechnical cloth from the river embankment blanket to the river embanked slope top on the river embankment slope surface; spreading the protective slope main body; and planting green plants. The combined protective slope adopts an interlocking block as the protective slope main body, plants green plants to assist slope protection, is environmentally friendly, is low in cost, and is relatively simple in daily maintenance and management.