61results about How to "Guaranteed anchoring effect" patented technology

The invention relates to the technical field of coal mine anchor rod supporting, and discloses a novel coal mine high-strength anchor rod supporting device. An anchor rod supporting mechanism comprises an outer anchorage rod, an inner anchorage sleeve and an outer blocking fixing assembly, the inner anchorage sleeve can be well connected with the inner wall of a drill hole through a reinforcing structure extending in the radial direction, the inner anchorage sleeve is of a circumferential expansion structure, can easily stretch into the drill hole and can carry out special grouting through a grouting device, integrated performance of the inner anchorage sleeve and the inner wall of an anchorage hole can be ensured, the reinforcing structure can stretch into the rock layer of the anchoragehole, the segmented grouting anchorage manner enables anchorage slurry to be more fully filled, the anchorage reliability can be improved, the combination force with the wall of the anchorage drill hole can be improved, anchorage effect is ensured, in addition, for the fragile portion at the connecting position of the inner anchorage sleeve and the outer anchorage rod, through the manner of arranging multiple radial fins, the connecting property of the connecting position can be effectively improved, and the supporting capacity is ensured.

The invention discloses a two arm-brace stretching method of an arc bridge tie bar cable, comprising the following steps of: sequentially installing a working anchor, a working anchor arm brace, a rear tool anchor, a tool anchor arm brace, a hydraulic jack and a front tool anchor, enabling the working anchor and the rear tool anchor in a loosening state, clamping a prestressing steel strand by using the front tool anchor and stretching an oil cylinder by using the hydraulic jack to feed oil and pushing the front working anchor for stretching the prestressing steel strand; stopping the stretching of the oil cylinder by using the hydraulic jack to feed oil when the hydraulic jack reaches the maximum stroke, clamping the prestressing steel strand by using the rear tool anchor to enable the front tool anchor to be in a loosening state and stretching the oil cylinder by using the hydraulic jack; carrying out next round of stretching operation after stretching the oil cylinder by using the hydraulic jack to return oil in place; and clamping the prestressing steel strand by using the working anchor when the prestressing steel strand reaches the requirement. In the stretching process, a working clamping piece of the working anchor is not forced, thus the invention solves the problems that the work clamping piece of the working anchor is repeatedly forced and teeth are blocked in the stretching process of a long steel strand cable in the prior art and prolongs the service life of the working anchor.

The invention discloses a hook-shaped steel core composite connecting piece prefabricated sandwiched heat insulation wallboard and a manufacturing method thereof .Internal and external acanthuses are formed by pouring concrete, a middle sandwich layer is a heat insulation board, and the three-layer structure is connected into a whole through hook-shaped steel core composite connecting pieces, wherein the hook-shaped steel core composite connecting pieces are hook-shaped reinforcing steel bar core continuous fiber composite connecting pieces and high-strength steel wire core model plastic compression molding steel core composite connecting pieces .The steel core composite connecting pieces of each kind are of a straight insertion type and an oblique insertion type .The internal and external concrete acanthuses are connected together through the straight insertion type hook-shaped steel core composite connecting pieces in a 90-degree orthogonal mode, and hook heads of the connecting pieces can hook an eternal acanthus internal reinforcing steel bar net; the internal and external wall acanthuses are connected together through the oblique insertion type steel core composite connecting pieces in a 45-degree oblique crossing mode .The prefabricated concrete sandwiched heat insulation external wall has the advantages of being high in anti-shear and anti-bending performance, good in heat insulation effect, high in construction efficiency, low in manufacturing cost, safe and reliable to use and the like .

The seabed anchor pipe installing process includes setting one mechanical vibrating unit in the top of anchor pipe, setting the anchor pipe on the seabed earth body, and inserting the anchor pipe to required depth for anchoring by means of mechanical vibration and the dead weight of the anchor pipe. Applying mechanical vibration can soften or even liquefy the earth body around the anchor pipe to reduce the resistance to the inserted anchor pipe. The present invention can ensure sufficient anchoring effect.

The invention discloses a side slope anchoring device for municipal engineering, and relates to the technical field of side slope anchoring. The side slope anchoring device for municipal engineering comprises an anchoring pipe, wherein pricking needles are slidably connected to the anchoring pipe in the radial direction of the anchoring pipe, a force application mechanism is arranged in the anchoring pipe, the force application mechanism comprises a force application rod which is coaxially arranged in the anchoring pipe, a plurality of cams used for pushing out the pricking needles are arranged on the force application rod in a sleeved manner, and a limit assembly used for preventing the cams from moving in the axial direction of the force application rod is arranged on the force application rod; a clamping groove is formed in each cam, a clamping rod is slidably connected to the force application rod in the radial direction of the force application rod, and one end of the clamping rodis abutted against the inner walls of the clamping grooves; and a tightly-abutting assembly capable of tightly abutting one end of the clamping rod into the clamping grooves is arranged on the forceapplication rod, and the clamping rod is capable of being separated from the clamping grooves, so that a relatively-rotating state is formed between the cams and the force application rod. According to the side slope anchoring device for municipal engineering, when the pricking needles in a part of pricking needle assemblies on the anchoring pipe are blocked from continuing to be pushed out, the pricking needle assemblies of the other groups are capable of being pushed out to reach an expected depth, so that the anchoring effect of the anchoring device is ensured.

The invention relates to the field of continuous girder cantilever construction, in particular to a concrete continuous girder cantilever construction load balance adjusting device and method. Temporary buttresses are arranged at the position, located at the two sides of a girder pier body, of a girder bearing platform, the upper end of the girder pier body bears a girder body, and finish rollingsteel bars are embedded at the positions, located at the two sides of the girder bearing platform, between the girder bearing platform and the girder body. The adjusting method includes the steps of pre-embedding the finish rolling steel bars, constructing the continuous girder main girder pier body, setting the temporary buttresses and putting up a temporary support, pouring concrete to completegirder body construction, fixedly connecting the girder body and the girder pier body to form a T-structure form and conducing full-bridge closure. The concrete continuous girder cantilever construction load balance adjusting device and method are provided.

The invention discloses a pre-buried anchor rod connecting structure penetrating through a pre-built building and a construction method thereof. The connecting structure comprises a pre-built mattress layer connected to the lower portion of a pre-built foundation, a foundation reinforcing pile connected to the interior of a soil body below the pre-built mattress layer, a top beam connected to the top of a supporting pile, an anchor rod free section connected to the interior of the top beam and the interior of the pre-built mattress layer in a penetrating mode in advance, an anchor rod connected to the tail end of the anchor rod free section and connected to the lower portion of the existing ground, and a cement grouting body connected to the periphery of the anchor rod in a sleeving mode. According to the pre-buried anchor rod connecting structure penetrating through the pre-built building and the construction method thereof, through arrangement of the cement grouting body, a foundation is provided for anchoring advantageously; the anchor rod obliquely extends downwards, and thus anchoring force can be provided in the maximum range; through arrangement of the anchor rod free section, the early-stage anchoring effect can be ensured; and through arrangement of an anchoring conversion piece and an elastic pipe, stress transmission, transition and protection of anchoring of the anchor rod are facilitated. According to the pre-buried anchor rod connecting structure penetrating through the pre-built building and the construction method thereof, construction of the pre-built building is not affected, and the influence of too much construction period and construction cost on a later-period adjacent foundation pit excavation project is avoided.

The invention provides an interlayer connecting joint for shear walls and belongs to the technical field of building structures. An upper wall body and a lower wall body are connected into a whole by the aid of the joint; connecting reinforcing steel bars are embedded at the bottom of the upper wall body; a floor is arranged between the upper wall body and the lower wall body and is made of a precast slab or a laminated slab; the laminated slab comprises the precast slab and a post-cast layer; longitudinal holes are formed in the lower wall body; bulges which extend out of the top of the lower wall body and are located at the same elevation of the top surface of the floor or are higher than the elevation of the top surface of the floor are arranged in the longitudinal holes; the precast slab is placed at the top of the lower wall body; concrete is poured into space formed by the lower wall body and the precast slab; no concrete exists in the longitudinal holes; and after the concrete reaches preset strength, the upper wall body is mounted, the connecting reinforcing steel bars of the upper wall body are inserted in the longitudinal holes, a grouting material or the concrete is poured between the upper wall body and the floor and inside the preserved holes, and the upper wall body and the lower wall body are connected into the whole. With the joint, the integrity of the assembled integral concrete structure can be improved.

The invention belongs to the technical field of tunnel engineering, and particularly relates to a subway tunneling underground excavation method. The method comprises the two steps of stratum combination engineering property model calculation and tunnel shallow-buried excavation construction. The stratum combination engineering property model calculation step comprises the steps that a stratum along a tunnel is divided into a stratum group and a subgroup, and the divided stratum combination is expressed through the stratum group and the subgroup; and selecting stratums in a range of 50m belowthe earth surface and the tunnel bottom for combination, substituting the stratums into the stratum combination engineering property model for calculation and analysis, and then performing a tunnel shallow-buried excavation construction process. According to the method, the engineering geological stratification within the range of 50 m of the influence depth of tunnel engineering construction is divided and deeply analyzed, so that the engineering geological stratification of the whole site is generally generalized, the construction process can be closely followed, and it is ensured that the shallow-buried excavation tunnel construction process is safely and smoothly carried out.

The invention relates to a fixing device for an operation platform for a shielding wall of an AP1000 nuclear island. The device comprises a tail anchor bar. One end of the tail anchor bar is machined with a threaded section and the other end of the tail anchor bar is bent to some degree. The thread section of the tail anchor bar is fixedly connected with a sleeve. After the sleeve is connected with the tail anchor bar, the overall part is poured into the interior of the shielding wall. The other end of the sleeve is connected with a connecting rod, on which an installing plate is fixed. The installing plate is fixed with an operation platform framework. The fixing device for the operation platform for the shielding wall of the AP1000 nuclear island has following beneficial effects: due to the fact that the fixing device for the operation platform is fixedly installed into the interior of a poured wall, loads of the overall fixing device can be supported by the wall, thereby facilitating fixed installation of the operation platform and ensuring safety and stability of the operation platform; and conduction efficiency is improved and quality is ensured.

The invention discloses a modern ship mooring positioning device. The modern ship mooring positioning device comprises a buoy body, an anchor chain, a balancing weight, a limiting roller and a mounting plate; an anchor chain is fixed to the lower end face of the buoy body; a functional plate is mounted on the buoyancy tank; limiting rollers are mounted on the function plate and the floating box; asupporting spring is fixed at the bottom end of the functional plate; the transmission gear is connected with a trigger plate, the trigger plate is installed on the buoyancy tank, a pulley block is installed on the inner side of the trigger plate, the top of the pulley block is attached to the outer side of a stabilizing plate, the stabilizing plate is fixed to a bottom shaft, the bottom shaft isinstalled on the inner side of an installation plate, and meanwhile the mounting plate is fixed to the top of the buoyancy tank. According to the modern ship mooring positioning device, a novel structural design is adopted, so that the bottom end of an anchor chain in the device can adapt to a complex seabed environment, the fixing effect of the anchor chain on an upper structure is guaranteed, meanwhile, a structure capable of positioning an oil and gas pipeline is designed, and the overall stability of the device is improved.

The invention discloses a replaceable anchor bolt assembly with adjustable anchoring length for a concrete foundation. The replaceable anchor bolt assembly comprises a steel framework, an anchor cylinder, an anchor rod, a sealing assembly and a nut assembly, wherein the steel framework is fixedly connected with the anchor cylinder and can be pre-buried in the concrete foundation, the anchor rod isfixedly connected with the anchor cylinder through threads, and the sealing assembly is arranged between the anchor rod and the anchor cylinder. Due to the structure that the anchor cylinder is fixedly connected with the steel framework, the positioning precision of the anchor rod can be guaranteed, and the anchoring performance of the anchor rod in the foundation can be guaranteed; the anchor cylinder and the anchor rod are in threaded connection, so that the replaceability of the anchor rod is realized, and the combination tightness of the anchor cylinder and the anchor rod is enhanced; andthe sealing assembly is arranged between the anchor rod and the anchor cylinder, so that the sealing performance of the anchor bolt in the mounting process is guaranteed. All components of the replaceable anchor bolt assembly are organically combined together, the replaceable anchor bolt assembly and the concrete foundation can form a good force bearing whole, and the integrity and replaceabilityof the anchor bolt assembly are achieved.