116results about How to "Improve the pull-out capacity" patented technology

The invention discloses an inner ring type seabed suction anchor for deep sea and an installation method thereof. The suction anchor comprises a suction main barrel, the suction main barrel is of a barrel type structure of which the bottom is opened and the top end is closed, the inner wall of the suction main barrel is provided with a plurality of hollow annular bulges at equal intervals along anaxial direction, the inner wall of the suction main barrel and the side walls of the hollow annular bulges form a barb-shaped structure, and the center and the edges of the top of the suction main barrel are provided with drainage holes. The suction anchor can more smoothly sink and penetrate into the soil, can sink to the preset design depth, reduces the disturbance to the soil outside the barrel to the maximum extent under the effect of increasing side friction resistance, and reduces the erosion of sea waves on existing foundations; the vertical bearing capacity and the ultimate pull-out resistance bearing capacity of the suction anchor can be greatly improved under various working conditions; and under the condition of realizing the functions, the convenience of recycling the suctionanchor can also be ensured.

The invention relates to a recoverable composite anchor rod and a construction method thereof in the field of geotechnical engineering anchoring. The recoverable composite anchor rod comprises a hot melt force transfer strip (2), a steel bar or a steel stranded wire (3), a heater (4) and a cement-soil anchor body (1), wherein the cement-soil anchor body (1) is connected with a rock-soil body (5) and provides anti-pulling bearing force; and the anti-pulling bearing force of the anchor rod is transferred through the gripping action of the hot melt force transfer strip (2), and the anchor rod is recovered by melting the hot melt force transfer strip (2). The anti-pulling bearing force of the anchor rod is improved, and the main stressed members of the anchor rod are convenient to recover simultaneously; and the anchor rod has a high recovery rate, is convenient to recover and construct, has low manufacturing cost and prominent environmental-friendly benefits, successfully solves the problem that the anchor rod exceeds a property line underground in cities during construction, can be widely applied to the fields of foundation pit enclosure engineering and the like, and can be popularized in soft soil areas.

The invention relates to an anchor-arm static-pressure pile device with self-sufficient pile pressing counter-force and a constructing method of the anchor-arm static-pressure pile device, and aims to provide the anchor-arm static-pressure pile device with the self-sufficient pile pressing counter-force. When an indoor construction pile foundation cannot provide a pile pressing counter-force, construction requirements can be realized by self-sufficient pile pressing counter-force, so that the efficiency is high, the cost is relatively lower, and pollution to the environment is avoided. The anchor-arm static-pressure pile device adopting steel pipe piles of which the pile tips are filled with slurry to provide counter-force comprises a pressure pile baseplate, the steel pipe piles and anchors, wherein anchor-arm static-pressure pile pressing holes and steel pipe pile pressing holes are formed in the pressure pile baseplate; the steel pipe piles are inserted through the steel pipe pile pressing holes and pressed to a certain depth; the slurry is arranged in the pile tips of the steel pipe piles; the tops of the steel pipe piles are connected with the press pile baseplate through grouting material tamping; the anchors are arranged outside the steel pipe pile pressing holes and the anchor-arm static-pressure pile pressing holes respectively, connected with a press pile counter-force rack and used for pressing the steel pipe piles or anchor-arm static-pressure piles to certain depths.

The invention discloses a grouting suction anchor comprising a cylinder body; the cylinder body has an integral structure comprising an upper part, an intermediate part and a lower part; the diameter of the upper cylinder body is identical to that of the lower cylinder body; the diameter of the intermediate cylinder body is less than those of the upper cylinder body and the lower cylinder body; the upper, the intermediate and the lower cylinder body share a same center line; a top part of the upper cylinder body is provided with multiple grouting inlets and scuppers; the grouting inlets are communicated with a grouting channel inside a side wall of the upper cylinder body; the grouting channel extends downwards to a lower end surface of the upper cylinder body; an outlet of a lower end of the grouting channel is positioned between the outer lateral surface of the upper cylinder body and the outer lateral surface of the intermediate cylinder body; the grouting channel and the cylinder body inner chamber are separated from each other. The invention also discloses an installation method of the suction anchor. After downward penetration of the suction anchor is completed, the intermediate cylinder body and soil body interspace are filled with cement mortar which can improve the lateral bearing capacity of the suction anchor. After the cement mortar is solidified, the friction coefficient between surrounding soil body and anchor cylinder contact surface is increased and the limit bearing capacity of the suction anchor is increased.

The invention provides a detachable prefabricated assembly type steel-concrete composite beam. The composite beam comprises a steel beam, a concrete slab, concave-convex steel board connecting piecesand a splicing steel board, the steel beam is of an I-shaped steel or rectangular steel structure, and the splicing steel board is arranged on the upper surface of the steel beam. The two concave-convex steel board connecting pieces are arranged on the two sides of the splicing steel board, and the two concave-convex steel board connecting pieces and the splicing steel board form a U-shaped structure. A T-shaped shear notch is formed in the middle of the concrete slab, the concrete slab is arranged above the steel beam, and the U-shaped structure formed by the two concave-convex steel board connecting pieces and the splicing steel board is located in the T-shaped shear notch of the concrete slab, and a shear groove post-pouring concrete layer is poured in the T-shaped shear groove openingof the concrete slab. The detachable prefabricated assembly type steel-concrete composite beam is convenient to construct, high in bearing capacity, high in shear capacity of connection between the steel beam and the prefabricated reinforced concrete slab, high in uplift bearing capacity, good in energy consumption performance and convenient to disassemble.

The invention discloses an inclined type barrel-shaped foundation mooring system and a construction method thereof. The inclined type barrel-shaped foundation mooring system comprises structures floating on the sea, buoys, anchor chains, a foundation ring, an inclined type barrel-shaped foundation, water drainage pipes, anchor bolts and steel wing plates. The inclined type barrel-shaped foundation is embedded in a seabed in a suction force sinking and penetrating manner. The steel wing plates and the anchor bolts are symmetrically welded to the side walls of the inclined type barrel-shaped foundation. The foundation ring used for hoisting the foundation is welded in the middle of a top cover of the inclined type barrel-shaped foundation. The two water drainage pipes with switches are arranged on the two sides of the foundation ring. The lower portions of the anchor chains are connected with the anchor bolts. The buoys are arranged on the upper portions of the anchor chains and connected with the structures floating on the sea. When upwards-pulled loads are borne by the inclined type barrel-shaped foundation, the uplift bearing capacity can be improved by fully utilizing the dead weight of the side walls of the inclined type barrel-shaped foundation, the dead weight of soil bodies on the upper portions of the steel wing plates and the friction force of the foundation and the soil bodies. One or more structures floating on the sea can be fixed; and when the upwards-pulled loads are borne by the anchor bolts on the upper portion and the lower portion of the inclined type barrel-shaped foundation, the dead weight of the steel wing plates and the soil bodies on the upper portion of the foundation can effectively resist the rotation torque generated by the inclined type barrel-shaped foundation at the moment.

The invention discloses a manual hole digging uplift pile structure. The manual hole digging uplift pile structure comprises a pile body and one or more pre-stressed anchor cables used for increasing axial uplift resistance of the pile body. The axial pre-stressed anchor cables are arranged in the pile body, the upper ends of the axial pre-stressed anchor cables are anchored to the pile head of the pile body, and the lower ends of the pre-stressed anchor cables radially penetrate through the side wall of the pile body and are anchored to the formation around the pile body. Concrete is poured to the pile body of a manual hole digging pile, after the strength reaches the design strength, the uplift resistance of the manual hole digging pile is increased by stretching the pre-stressed anchor cables, and the pile body durability and the uplift bearing capacity can be greatly improved. The structure is easy to construct, construction is conducted in a sectioned mode, and the quality is controllable; when the manual hole digging pile bears upward uplift resistance, especially the manual hole digging pile of a montanic socketed pile with low side friction, through the structure and a construction method thereof, the uplift resistance of the manual hole digging pile can be effectively improved, and the durability of the manual hole digging pile body is greatly improved.

The invention discloses an assembled concrete pile cap and miniature pile combined foundation and a construction method thereof. The assembled concrete pile cap and miniature pile combined foundationis divided into two parts, the lower part is micro grouting steel pipe piles, the upper part is the assembled concrete pile cap, and the pile cap and the micro grouting steel pipe piles are connectedby the adoption of a grouting technology after reinforcing steel bars in pile bodies are anchored into anchor bolt reserved holes. Double-layer bi-directional arrangement of pre-stressed tensioning isadopted in the site, and pre-stressed tension is carried out in two times, so that the assembled concrete pile cap has the beneficial effects of being high in integrity and uniform in stress. The combined foundation is the combination of the upper assembled concrete pile cap and the lower miniature steel pipe pile group and has the beneficial effects that the settlement of the foundation is reduced, the application range is wide, and the construction period is short.

The invention discloses an inverted wedge type recoverable anchor rod which comprises a threaded rod body with threads on the outer side. One end of the threaded rod body serves as an anchorage section and is provided with a first nut for fastening, and the other end of the threaded rod body serves as an anchor head and is provided with a tray and a second nut; the outer side of the threaded rod body located between the tray and the first nut is connected with a threaded casing pipe system through surface threads, the threaded casing pipe system is composed of multiple threaded casing pipe subsystems, and the threaded casing pipe subsystems are fixedly connected; each threaded casing pipe subsystem comprises a threaded steel pipe and a wedge, the threaded steel pipes are fixedly connected with the wedges, threaded casing pipes and wedges of every two adjacent threaded casing pipe subsystems are connected. After mounting of the anchor rod is completed, a broken rock-soil body is firmly hung on a stable rock-soil body, therefore, the overall strength of rock is increased, the uplift bearing capacity of the anchor rod is improved, and meanwhile the force of the anchor rod is more reasonable. A support effect can be played as soon as possible after mounting, the rod body can be taken out for temporary support, and materials are saved.

The invention discloses an earthquake liquefaction and suspension resisting structure and an earthquake liquefaction and suspension resisting method for a metro station, solves the problem that in theprior art the metro station easily loses anti-pull force after a soil layer is liquefied, and achieves the beneficial effect of enhancing the anti-pull force of a bed rock section. The earthquake liquefaction and suspension resisting structure comprises a plurality of anti-suspension anchor rods; one end of each anti-suspension anchor rod is connected with the sidewall of the metro station or a base plate of the metro station; the other end of each anti-suspension anchor rod is arranged at a bed rock ground layer, wherein each anti-suspension anchor rod adopts a segmented type anchor rod; thecircumferential side of the second section, inserted into the bed rock ground layer, of each anti-suspension anchor rod is provided with high-strength mortar; and the circumferential side of the first section, inserted into a liquefiable ground layer, of each anti-suspension anchor rod is provided with common mortar.

The invention belongs to the technical field of preformed units in the building industry and relates to a precast pile with a concave clamping platform and a convex clamping platform. The precast pile solves the technical problems that in the prior art, connection is not convenient and not firm. The precast pile comprises a pile body. The pile body is internally provided with a reinforcement cage. The reinforcement cage comprises a plurality of longitudinal reinforcement bars and spiral reinforcement bars fixedly connected with the longitudinal reinforcement bars. The two ends of the pile body are provided with a concave-convex clamping platform mechanism. When two adjacent pile bodies get close to each other, the concave-convex clamping platform mechanism can enable the two pile bodies to be matched in a clamped and connected manner so that the two pile bodies can be connected. According to the precast pile, the pile bodies can be quickly and firmly connected.

The invention discloses an oblique skirt type suction foundation suitable for a soft soil foundation. The oblique skirt type suction foundation comprises a main bucket, a foundation top plate fixedly connected to the main bucket, and a skirt structure annularly fixed to the outer edge of the foundation top plate. The skirt structure is an oblique skirt structure, and the oblique skirt structure is in a horn shape. The horn-shaped oblique skirt structure is adopted, and when a structure object on the foundation is subjected to horizontal and vertical loads, the foundation area is increased in the vertical direction through a horn-shaped body of the oblique skirt structure, and therefore the vertical bearing force of the foundation is increased. Meanwhile, due to existence of the horn-shaped body of the oblique skirt structure, the uplift bearing force of the foundation is increased. The horn-shaped body of the oblique skirt structure generates the vertical pressure component under the action of the horizontal loads, accordingly, the horizontal bearing force of the foundation is increased, and therefore the vertical bearing force, the uplift bearing force and the horizontal bearing force of the suction foundation can be improved, and the safety coefficient of the suction foundation is improved; and meanwhile, construction is convenient, and the project cost can be reduced.

The invention discloses a static pressure type rear support screw pile based on bionics, which comprises a pile tip, an outer sleeve, a flange and an empennage, the empennage is arranged at the upperend of the outer sleeve, the flange is arranged at the top ends of the empennage and the outer sleeve, an outer support blade is arranged at the lower part of the outer sleeve, and when the outer support blade is pressed at the top of the outer sleeve, the outer supporting blades are unfolded outwards. A built-in steel pipe or a flexible anchor rod is arranged in the outer sleeve, and the pile tipis fixedly connected with the built-in steel pipe or the flexible anchor rod. By optimally designing the pile body, the side resistance is small during static pressure pile sinking penetration, the outer supporting blades are unfolded through secondary sinking of the outer sleeve, the vertical uplift and compression resistance bearing capacity of the outer supporting blades is improved, the horizontal bearing capacity of the outer supporting blades is improved through the arrangement of the empennage, and the uplift bearing capacity of the pile side and the blades is improved by utilizing thecharacteristics of compression shrinkage and tension expansion of negative poisson ratio materials. The method has the advantages of small soil disturbance, low construction noise and environmental friendliness.

The invention provides a construction method for an anchor rod for civil engineering. The construction efficiency is high, mud and vibration are avoided, the stability performance of anchor holes is high, the strength of the anchor rod is high, and the anti-puling bearing capability of the anchor rod is high. The construction method comprises the following steps that an eye position is marked through paint; a drilling machine is moved to the preset position, and a drill bit is driven by a drill rod to drill into the eye position; when it is found that drilling is difficult for the drilling machine, the air pressure and the drilling speed are adjusted in time; in the rotating process of the drill rod, the perpendicularity of the drill rod is observed in real time; after the drill bit drills into the position by the preset depth, whether underground water exists in an anchor hole or not is observed, and when a large amount of underground water exists, clean water is injected in the anchor hole, and when no underground water or a small amount of underground water exists in the anchor hole, cleaning is carried out through an air compressor air pipe; quality detection is carried out on a steel bar, and the steel bar is placed into the bottom of the anchor hole in a manual stacking manner; and a grouting pipe is inserted into the anchor hole, grouting is carried out through a grouting pump and the grouting pipe communicated with the grouting pump, and when the grout reaches the designed height, the grouting pipe is pulled out, and the grout and the steel bar are solidified and form the anchor rod.

The invention relates to a novel prefabricated stainless steel heat preservation connector outer wall. A heat preservation layer is arranged on the outer side of an inner leaf wall board, and an outerleaf wall board is arranged on the outer side of the heat preservation layer; one end of a heat preservation connector is fixed in the inner leaf wall board, and the other end of the heat preservation connector penetrates the heat preservation layer to be fixed in the outer leaf wall board; one end of a limit pull member is fixed in the inner leaf wall board, and the other end of the limit pull member penetrates the heat preservation layer to be fixed in the outer leaf wall board; and the invention also relates to a production method for the novel prefabricated stainless steel heat preservation connector outer wall. The novel prefabricated stainless steel heat preservation connector outer wall has the beneficial effects that the thermal expansion coefficient of the connector needs to be close to wall bodies on both sides to ensure that during the use of the wall boards, the relative displacement between the inner and outer leaf wall boards is prevented; the novel stainless steel connector is easy to operate and simple in process in the production of the outer wall, and the stainless steel connector has better corrosion resistance and mechanical strength than a conventional connector; and the overall shear resistant strength of the prefabricated wall is increased, and the pulling-resistant bearing capacity is high.

The invention discloses a paste slurry drilling, grouting and impact extrusion expanded-head anchor rod structure system and a construction method thereof. According to the construction method, a self-drilling type hollow grouting anchor rod meeting the design requirement is directly used, and a drilling and grouting integrated in-situ impact extrusion grouting method is adopted, and middle-high pressure paste slurry impact extrusion drilling and grouting are conducted on full-hole section surrounding soil from top to bottom; and then a paste slurry pulse high-pressure pile squeezing and splitting method is adopted for conducting segmented reciprocating high-pressure paste slurry impact extrusion expanding grouting on an expanded-head anchoring hole section from bottom to top, after the expanded-head anchoring section meeting the design requirement is formed, middle-high pressure paste slurry impact extrusion drilling and grouting are conducted from top to bottom, and the self-drillingtype hollow grouting anchor rod is installed in place, so that the composite anchor rod structure system is formed, wherein the composite anchor rod structure system is combined with the self-drilling type hollow grouting anchor rod, and the composite anchor rod structure system is composed of upper non-anchored section middle-high pressure paste slurry impact extrusion grouting composite surrounding soil, a lower anchored section high-pressure paste slurry impact-extrusion expanded head pile body, a pile periphery slurry extrusion and splitting vein and a compacted soil body. The paste slurry drilling, grouting and impact extrusion expanded-head anchor rod structure system is convenient to construct, small in waste slurry amount, safe, environment-friendly and controllable in quality.

The invention discloses a drilling and high-pressure grouting construction method for an uplift pile. The drilling and high-pressure grouting construction method includes the steps that step1, construction preparation is performed; step2, paying-off positioning is performed; step3, a drilling machine is in place; step4, drilling is performed; step5, casing running is performed; step6, drilling is continued to a designed elevation; step7, hole sealing grouting is performed; step8, concrete pouring is performed; step9, steel bars are inserted; step10, drilling tool and earthwork clearing is performed. The drilling and high-pressure grouting construction method has the advantages that in the drilling process, noise is low, vibration is small, the construction period is short, influences on surrounding traffic and social activities are small, and the construction method is a green construction method; while the uplift bearing capacity of a foundation is improved, the construction method saves a lot of resources and energy, and has remarkable social benefits.