32results about How to "Reduce the number of supports" patented technology

The present invention provides a combined guide slippage type forepoling hydraulic bracket which comprises an internal support unit and an external support unit (12 and 11) which are symmetrical to each other at left and right. Each support unit comprises a top beam (1), a pedestal, a guide stabilizing mechanism and a hydraulic support component upright post. An upright post is articulated between the top beam and the pedestal. A telescopic link type guide stabilizing mechanism is arranged at the middle parts of the top beam and the pedestal. The outer side of the internal support unit is provided with the external support unit. Connecting slide rods (7) are respectively connected between the top beams and the pedestal beams at the same side of the adjacent internal and external support units. An inter-frame jack (8) is articulated between the top beam and the pedestal of the symmetrical internal support unit to form a section of bracket. The bracket forms an independent motor unit. The hydraulic bracket consists of a plurality of independent motor units. An advancing jack (17) is connected between the pedestals (9) of the independent motor units. The front end of the pedestal (9)of a section of bracket at the front end of the hydraulic bracket is connected with a head frame pulling and moving mechanism. The hydraulic bracket can effectively support a big section laneway and realizes the forepoling and the forepoling automatization of the big section laneway.

The invention discloses an assembled reinforced concrete beam-slab structural system with a cast-in-situ layer in a building structure. The assembled reinforced concrete beam-slab structural system comprises a superposed beam, a superposed slab, reinforcing mesh pieces, the cast-in-situ concrete superposed layer and beam negative reinforcements, wherein the superposed beam is a reinforced concrete precast beam; outwardly projecting tongue-and-grooves are formed in two sides of the upper part of the superposed beam; the superposed slab is horizontally arranged and is a reinforced concrete precast slab; cover-plate-type tongue-and-grooves are formed at the positions, corresponding to the outwardly projecting tongue-and-grooves, on two sides of the superposed slab, and overlapped on the outwardly projecting tongue-and-grooves; the reinforcing mesh pieces and the beam negative reinforcements are horizontally arranged above the superposed beam and the superposed slab; the reinforcing mesh pieces are bundled up with corresponding reinforcements in the superposed beam and the superposed slab; the beam negative reinforcements are bundled up with corresponding reinforcements in the superposed beam; after arrangement of the reinforcing mesh pieces and the beam negative reinforcements, concrete is poured to form the cast-in-situ concrete superposed layer. The assembled reinforced concrete beam-slab structural system has favorable integrity and mechanical property, and the integrity and the anti-seismic property can be improved.

The invention relates to a hot blast main refractory material building die and a construction method thereof. The die comprises a center shaft and three supporting rods with the middle portions rotationally arranged on the center shaft. The supporting rods can stretch and contract on the two sides of the center shaft. Arc arms are hinged to the two ends of each supporting rod, one ends are provided with butt-joint clamping grooves, the arc arms are distributed around the center shaft in the same direction and are equal in length, the other ends of the arc arms can be connected with the butt-joint clamping grooves in the next supporting rods in a matched manner, and the refractory brick inner circle meeting the design requirement can be defined after the arc arms and the butt-joint clampinggrooves are connected in a matched manner. According to the die, construction is conducted in a rotation pushing manner, the number of pipe interior supports is reduced on the premise that the quality testing and die dismounting time is saved, the quality is guaranteed on the premise that space is saved, the construction quality problem can be rapidly found, repeated usage can be achieved in thenarrow space of a hot blast main, and collisions are avoided.

The invention provides a novel mounting method of an anchor pulling block. The novel mounting method comprises the following steps of: (1) placing a concrete square mound in a center direct-facing position of the anchor pulling block; (2) fixing a connecting iron part on the concrete square mound, and fixing all holes at the four corners of the connecting iron part with expansion bolts; (3) sleeving a reinforcing part, namely a steel cap, of the anchor pulling block in the middle position at the top of the anchor pulling block, and fastening bolts on the inner side to enable the steel cap to be tightly clung to the anchor pulling block; (4) connecting the steel cap and the concrete square mound with a lead screw, wherein the lead screw is connected with the connecting iron part and the steel cap through bolts, and the bolts need to be tightened with a wrench; and (5) tightening the bottom of the anchor pulling block and a prepared reinforcing steel bar by using a wood chip of 10cm long. According to the novel mounting method provided by the invention, only the outside of the anchor pulling block needs to be supported, so that supporting materials can be saved, and besides, the efficiency of backfill construction on the rear side of the anchor pulling block is improved.

The invention relates to the technical field of prefabricated concrete structure assembly, in particular to a device for adjusting the hoisting elevation and verticality of prefabricated concrete structure columns and a construction method thereof, which includes a horizontal setting and is used for casting in-situ with the core area of ​​prefabricated concrete structure nodes The positioning iron ring connected to the beam longitudinal reinforcement at the position, the positioning iron ring is triangular or quadrilateral and the ends of all the inner corners are respectively provided with adjustment kits, which are correspondingly embedded in the lower end of the prefabricated upper column. Embedded parts for living. The device has a compact structure, is convenient for adjusting the hoisting elevation and verticality of the prefabricated concrete structure column, and has a simple and convenient construction method.

The invention discloses a subway station deep foundation pit excavation construction method, wherein the upper portion of an excavated foundation pit is a sandy gravel stratum, and the lower portion of the excavated foundation pit is a mud rock stratum. The method includes the steps of 1, precipitation construction, wherein precipitation construction is conducted on the sandy gravel stratum through a precipitation well and 2, foundation pit excavation, wherein the foundation pit excavation includes the following steps of foundation pit partition and foundation pit earthwork excavation; the excavated foundation pit is divided into a plurality of small foundation pit bodies to conduct excavation respectively; the small foundation pits comprise first foundation pit bodies and second foundation pit bodies; excavation is conducted on the divided small foundation pit bodies; an open-cut method is adopted for the first foundation pit bodies and the second foundation pit bodies; the first foundation pit bodies are supported by fender posts, reinforced concrete supports and steel pipe inner supports; the second foundation pit bodies are supported by the fender posts, pre-stressed anchor cables and the steel pipe inner supports. The subway station deep foundation pit excavation construction method is simple in step, reasonable in design, convenient to construct, faster in construction process, good in construction effect and capable of easily conveniently and fast to finish deep foundation pit excavation construction process, and the influences on the surrounding environment by the excavation construction process are smaller.

The invention relates to a post-cast strip side mold support construction method; an inflatable arc angle rectangular flexible pipe is arranged in a gap between an upper layer steel bar and a lower layer steel bar in the post-cast strip position; in inflation, the arc angle rectangular flexible pipe is extruded by the upper and lower layer steel bars so as to fill the gap caused by the steel bars;the soft pipe is inflated to form an air column so as to space the concrete; the cross section outer contour of the arc angle rectangular flexible pipe is an arc-shaped rectangular shape; the arc angle rectangular is a rectangular with four arc-shaped corners, and is an axially symmetrical and centrosymmetric geometric figure; the arc angle rectangular flexible pipe comprises a soft pipe outer wall and a soft pipe inner wall; the soft pipe outer wall cross section is the cross section contour of the arc angle rectangular flexible pipe, i.e., an arc angle rectangular; the soft pipe inner wallcomprises an upper pipe inner wall, a lower pipe inner wall and a common inner wall; the area enclosed by the upper pipe inner wall and the lower pipe inner wall is an air pump pressurization area; anarea enclosed by the soft pipe outer wall, the lower portion of the upper pipe inner wall and the upper portion of the lower pipe inner wall is an air connection area; the common inner wall has a constant pressure hole. The method employs the inflatable arc angle rectangular flexible pipe support, is good in moulding effect, high in construction quality, and high in efficiency.

The invention discloses a prestressed H-type steel supporting structure and a construction method thereof. The prestressed H-type steel supporting structure comprises a plurality of prestressed supporting units. Each prestressed supporting unit comprises a supporting pile, a plurality of steel supports and prestressed bars, wherein the supporting pile is vertically arranged on one side of a foundation pit to be excavated, the steel supports are arranged on the supporting pile from top to bottom, and one end of each prestressed bar is anchored to the lower portion of the supporting pile. The prestressed supporting units are sequentially driven into the periphery of the foundation pit to be excavated, the steel supports all face the foundation pit to be excavated, a top beam is arranged at the top end of each prestressed supporting unit, and each prestressed supporting unit and the corresponding top beam are integrated. Tensile force is applied to the prestressed bars, and the upper ends of the prestressed bars are anchored to the top beams. The horizontal component of the tensile force borne by the prestressed bars is transferred to the supporting structure, and therefore partial soil pressure of soil is counteracted, the supporting strength is improved, and deformation of the supporting piles is reduced. In addition, the supporting structure can be recycled, and therefore the cost is reduced.