41results about How to "Low reinforcement cost" patented technology

The invention discloses a deformation control method when a shield traverses a building within a short distance. The deformation control method comprises the following steps of: firstly, analyzing effects of shield tunneling on a stratum and the building under the conditions of different support pressure ratios and different grouting effects by using a numerical analysis method, and putting forward an optimal support pressure ratio and demands on slurry property; secondly, reinforcing shielding excavation surface stability control, improving muck inside a pressure chamber into be at a liquid-plastic state by a muck conditioning mode, reducing fluctuation of pressure control, and controlling overexcavation by comparison of actual slag quality and theoretical slag quality; and finally, reinforcing wall grouting liquid performance control, and timely filling a shield tail gap without loss of slurry by adopting high-intensity slurry with thixotropy. In a shield tunneling process, security monitoring can be reinforced; a shield tunneling parameter can be timely adjusted, and the security of an adjacent building is ensured. According to the method, a large amount of stratum reinforcing expense is reduced, and an underground space is utilized relatively effectively.

The invention discloses a beam-removing rib-increasing strengthening construction technology of a highway bridge. A bearing beam of a strengthened bridge comprises a plurality of hollow beam plates. The technology comprises the following steps: chiseling and removing an original collision prevention guardrail and a bridge face laying layer; eliminating a transverse connection hinge seam between the two adjacent hollow beam plates; hanging and moving the hollow beam plates and supporting reasonably; embedding ribs and pouring the pad stone of a supporting seat anew; checking, determining, recycling the hollow beam plates, repairing defects and processing cracks; sticking the beam bottoms of edge beams and strengthening steel plates; anew installing the hollow beam plates transversely at intervals; constructing rib beams which are added newly; constructing a steel bar net of the bridge face laying layer and embedding the steel bar of the collision prevention guardrail in advance; pouringthe concrete of the bridge face laying layer; and constructing the collision prevention guardrail and installing bridge face expansion joints. The invention has reasonable design, smaller execution difficulty, simple construction steps and low construction cost, has small damage to the original hollow beam plates, can enhance the bearing capacity of an original structure of a hollow plate bridge,has very good strengthening effect and can effectively solve the strengthening problem of the hollow plate bridge.

The invention discloses a cement-based material surface permeation protective agent and a preparation method thereof and aims at providing a cement-based material surface permeation protective agent which is completely different from the existing surface coating materials and surface hardeners and a preparation method of the protective agent. The cement-based material surface permeation protective agent comprises the following components in percentage by weight; 30%-60% of master batch, 30%-60% of composite silane, 1%-40% of organic solvent and 0%-10% of additives. The permeation protective agent is mainly used for improving the surface protective properties of the cement-based material and enhancing the durability of the cement-based material, and is capable of remarkably enhancing the harmful ion erosion resisting capacity of the cement-based material and also capable of improving the properties such as pollution resistance, salt rust resistance, wear resistance, heat preservation property and waterproof property; meanwhile, the permeation protective agent is capable of reducing the surface defects of the cement-based material such as surface powdering, dropping, frost crack and denudation; the permeation protective agent plays an important role in improving the safety of the cement-based material in the service life period, reducing the later-period maintenance and reinforcement costs and realizing long-term utilization of the cement-based material, and thus has extremely high application value and wide market application prospect.

The present invention relates to a method for treating various soft soil stratum ground bases. Said method is characterized by adopting underground deep-layer blasting compaction technique and ground surface shallow-layer vibration ramming technique and making them be combined with high-vacuum well-point dewatering technique so as to implement treatment of soft soil stratum ground base with large area.

The invention discloses a slide-resistant pile and anchor cable framework combined type active reinforcing method for a side slope. The slide-resistant pile and anchor cable framework combined type active reinforcing method comprises the following steps: measuring mechanical parameters before and after the side slope is softened, establishing a two-dimensional geological generalized model, and setting boundary conditions; taking softened rock-soil mechanical properties into the two-dimensional geological generalized model, calculating a first safety coefficient F1, and judging whether active reinforcing is performed or not; setting a combined reinforcing way and reinforcing parameters for a slide-resistant pile and anchor cable framework according to the two-dimensional geological generalized model and a potential slide layer state; taking original rock-soil mechanical parameters into the two-dimensional geological generalized model, calculating a second safety coefficient F2 for the reinforced side slope, and judging whether engineering stability is met or not. Based on rock-soil physical and mechanical parameter changes before and after excavation, slide-resistant piles and anchor cables are adopted to perform active reinforcing after excavation; and strength, at an initial state, of rock soil is utilized to prevent rock-soil strength from greatly reducing due to the fact that the excavated slope is deformed and softened.

The invention discloses a mixing improvement method and blending method for phyllite weathered soil and red clay. The method includes the following step that the red clay is blended into the phylliteweathered soil to form mixed filler of C filler with the liquid limit less than 40%. The method overcomes the restriction that in the traditional method, phyllite weathered soil and red clay can onlybe separated and placed in layers, and the application scope of the soil with special engineering properties is enlarged; the filler meeting the roadbed specifications can be obtained, the engineering properties of mixed filler are improved, the fracture properties of red clay are reduced, and the compaction strength and stability of the phyllite weathered soil are increased; the consumption of the phyllite weathered soil is largely increased, and the harm of abandoned phyllite weathered soil is reduced; the cost of the reinforcing agent improvement method is reduced, the method can be used for filling of railway special lines and freight yard road foundations, and the engineering cost is saved.

The invention relates to a tunnel arch foot circumferential high pressure jet strengthening method and a construction equipment. The construction equipment comprises a rack guide rail, a rack, an arc slideway, a movable sliding frame, a fixed sliding frame, a hydraulic oil cylinder, an arc drill rod, a high pressure pump station and a hydraulic pump station, wherein the feeding and retracement of the arc drill rod are controlled by the hydraulic oil cylinder; when the arc drill rod is fed, the hydraulic pump station jets high pressure water; when the arc drill rod is retraced, high pressure cement paste is jet through high pressure; and a left overlapping region, a left side circumferential strengthening bottom plate, a middle overlapping region, a right side circumferential strengthening bottom plate and a right overlapping region form a closed strengthening circle at the bottom part of a tunnel, thus effectively solving the strengthening problems of a tunnel arch foot and an inverted arch part under the condition of weak surrounding rocks and particularly saturated silt-fine stones.

The invention discloses an initial strengthening method specific to an unstable slope. The initial strengthening method includes the steps that mechanics parameters obtained before and after softeningof the slope are measured, and whether initiative strengthening needs to be conducted or not is judged; a two-dimensional geological generalized model is established, and boundary conditions are set;rock and soil mechanics parameters obtained after softening are brought into the two-dimensional geological generalized model, a first safety coefficient F1 is calculated, and whether initiative strengthening needs to be conducted or not is judged; a strengthening manner and strengthening parameters of an anchor cable frame are set according to the two-dimensional geological generalized model; and initial rock and soil mechanics parameters are brought into the two-dimensional geological generalized model, a second safety coefficient F2 is calculated on the strengthened slope, and whether thesecond safety coefficient conforms to project stability or not is judged. By means of the initiative strengthening method, rock and soil physical and mechanics parameter changes obtained before and after excavation are taken into consideration, the anchor cable frame is immediately adopted for conducting initiative strengthening on the slope after excavation, the strength in the rock and soil initial state is sufficiently utilized, the phenomenon that the rock and soil strength is greatly reduced when the slope is deformed and softened after excavation is avoided, and slope plants can be effectively protected against damage.

The invention relates to a foundation treatment method combining vibration ramming compaction at a shallow layer and blasting compaction at a deep layer with well-point dewatering, which adopts a manner of combining the blasting compaction at the deep layer underground, ground machine vibration or forced ramming shallow-layer compaction and high vacuum well-point dewatering so as to conduct large-area soft soil foundation treatment. The method comprises the steps of: bestrewing the ground surface of the consolidated foundation region with well point pipes and starting a vacuum pump for drainage; pulling out the well point pipes, using a drilling machine for drilling a plurality of blasting holes, placing blasting charges at places of different depths along the interiors of the blasting holes, leading out a blasting fuse, igniting the blasting fuse and detonating the blasting charges inside the blasting holes of deep foundation; arranging a vibration compacting machine or forced ramming equipment on the ground surface of the consolidated foundation region and starting the vibration compacting machine or the forced ramming equipment; and withdrawing the vibration compacting machine or the forced ramming equipment, bestrewing the ground surface of the consolidated foundation region with the well point pipes and starting the vacuum pump for drainage. The method has the characteristics of short construction period, low construction cost, deep treatment depth and the like.

The invention relates to a built-in anti-slide pile active reinforcing method suitable for an unstable slope, and belongs to the technical field of geotechnical engineering. The method comprises the steps that initial judgment of active reinforcement of an unstable side slope is conducted; a model of a side slope active reinforcement scheme is established; secondary judgment of active reinforcement is adopted for the side slope; and an active reinforcement scheme of the built-in anti-slide pile of the side slope and the like are designed. According to the method, changes of physical and mechanical parameters of rock and soil before and after engineering excavation are considered, the built-in anti-slide piles are adopted to actively reinforce the side slope before excavation, the strength of the rock and soil in the initial state is fully utilized, and the situation that the strength of the rock and soil is greatly reduced due to deformation and softening of the slope after excavation is avoided.

The invention relates to an anti-shearing reinforcement device and method for a concrete box girder web. In order to solve the problem that in existing engineering technologies, the concrete box girder web has cracking inclined cracks and insufficient anti-shearing bearing capacity, an external vertical prestressing tendon reinforcement device and method are provided. The device comprises groove-shaped steel, L-shaped steel, vertical prestressing tendons, wedge-shaped steel cushion blocks and an anti-corrosion coating at the outer side of the web. The groove-shaped steel is horizontally fixedto the junction of the upper end of the web and a top plate in the girder length direction. The L-shaped steel (6) is horizontally fixed to the lower end of the web in the girder length direction andis parallel to the groove-shaped steel (5). The vertical prestressing tendons are vertically mounted on the groove-shaped steel and the L-shaped steel, and it is ensured that the vertical prestressingtendons are parallel to the plane of the web. According to the anti-shearing reinforcement device and method, the web is connected with the top plate and a bottom plate through finish rolling twistedsteel, the force transmission path is definite, the risk that web concrete is pulled broken is reduced, and meanwhile, midspan deformation is reduced; the problem of insufficient main tensile stressof the web concrete is effectively solved, and the situations of continuous extension of the inclined cracks of the web or new inclined cracks are prevented.

The invention discloses a duct piece fixing pile device for fixing a shield tunnel duct piece. The duct piece fixing pile device comprises a grouting outer sleeve and a grouting inner sleeve; a connecting part and a step part are arranged at the front end of the grouting outer sleeve, the connecting part is fixedly connected with the step part, a sealing cover is arranged at the rear end of the grouting outer sleeve; a supporting part is arranged at the front end of the grouting inner sleeve, the supporting part is located on the step part, the step part is fixedly connected with the supporting part, a grouting bag is connected to the rear end of the grouting inner sleeve; threads are arranged on the outer parts of the ends, close to the connecting part, of the connecting part and the grouting outer sleeve correspondingly; and the invention further discloses a construction method of the pipe piece fixing pile device, and the construction method comprises the steps of grouting hole opening, grouting liquid stirring, grouting and the like. According to the duct piece fixing pile device for fixing the shield tunnel duct piece, fixing the tunnel duct piece in time can be carried out during shield construction, so that the construction efficiency is effectively improved, and the construction quality is improved.

The invention provides a method for enhancing the radiation resistant characteristic of an LDMOS (Laterally Diffused Metal Oxide Semiconductor), belonging to the technical field of radiation resistance of an integrated circuit and aiming at the conventional LDMOS transistor structure of a radio-frequency power device. The method is characterized in that materials selected by and used for a drift region STI dielectric layer and a device isolation region dielectric layer of an N type LDMOS transistor are different from the materials selected by and used for a drift region STI dielectric layer and a device isolation region dielectric layer of a P type LDMOS transistor; the drift region STI dielectric layer and a device isolation region of the N type LDMOS transistor select and use the materials which are easier to trap electrons after being radiated; and the filling materials of the drift region STI dielectric layer and the device isolation region dielectric layer of the P type LDMOS transistor are materials which are easier to trap cavities. The invention is used for the radiation resistant design of a semiconductor device and the integrated circuit and can enhance the radiation resistant capability of the integrated circuit and reduce the strengthening cost.

The invention relates to the field of cargo transportation, and discloses a device for reducing buffer force, which includes a buffer unit and a connection unit connected thereto, the buffer unit includes a buffer layer and a connecting rod passing through the buffer layer, and the connecting rod has at least Two of them pass through the buffer layer oppositely; one end of the connecting rod is arranged in a ring shape, and the other end is stuck outside the buffer layer. When the buffer force reducing device of the present invention acts on the transported goods, it can absorb and slow down the longitudinal inertial force received by the goods to be reinforced, save the use of reinforcement materials, reduce operating time, reduce reinforcement costs, and improve reinforcement performance, thereby ensuring transportation safety ; And the device for reducing the buffering force cooperates with strip-shaped straw pads and wire rope fasteners, which is suitable for bundling and reinforcement of open and flat vehicles, and the transportation safety performance is greatly improved.

The invention discloses a prestressed concrete hollow plate reinforcing device and method. The device comprises a prestressed concrete hollow plate and an unbonded steel strand for reinforcing the prestressed concrete hollow plate. The unbonded steel strand penetrates into a hollow hole of the prestressed concrete hollow plate from one end of the prestressed concrete hollow plate, and the unbondedsteel strand penetrates out of a reinforcing hole in the other end of the prestressed concrete hollow plate after steering through a steering block. The two ends of the unbonded steel strand are anchored to support beams of the prestressed concrete hollow plate through anchoring devices. According to the prestressed concrete hollow plate reinforcing device and method, the aim of improving the bearing capacity of the prestressed concrete hollow plate is achieved without increasing the dead weight and section height of the prestressed concrete hollow plate. Due to the fact that the prestressedconcrete hollow plate can be reinforced simply on the plate face, the limitation that according to an existing reinforcing method, the plate bottom needs to be reinforced is solved, and certain special needs are met. In addition, the device and method are clear in reinforcing structure stress, convenient to construct, short in construction period and low in reinforcing cost, and have high application value.

The invention discloses a small village highway bridge reconstruction and reinforcement method. A reinforcement module is included. The reinforcement module comprises an under-bridge reinforcement module and an on-bridge reinforcement module. The under-bridge reinforcement module comprises a water and soil protection module, a pile foundation enlargement module and a pile cap repairing module. Theon-bridge reinforcement module comprises a bridge deck expansion module, a bridge deck strengthening module and a monitoring module. The water and soil protection module comprises a gabion protectionmodule and an embedded wall building module. The pile foundation enlargement module comprises a cleaning module, a dabbing module and a strengthening module. The embedded wall building module comprises an embedded wall. The pile cap repairing module comprises a new pile cap which is built under water and an old pile cap. According to the invention, scouring and damage to a pile foundation by currents are avoided, forced sedimentation is conducted under piers, thus water and soil are effectively conserved, the pile foundation is avoided being emptied, the cost of reinforcement is lowered, thepile foundation is effectively improved, the weight of passing vehicles is detected, damage to the bridge by overweight vehicles is effectively avoided, and thus the maintenance cost of the bridge islowered.

The invention discloses a sectional assembling steel sleeve, and relates to the technical field of steel sleeve manufacturing. The technical problems that an existing starting and receiving steel sleeve cannot be subjected to sectional assembling, the construction convenience is poor, the installation time is long, the steel sleeve cannot be recycled, and therefore the construction cost is increased are solved. According to the technical scheme for solving the problems, the sectional assembling steel sleeve has the technical effects that the steel sleeve is formed by assembling and connecting a plurality of small steel structure modules into a whole, and therefore the steel sleeve can be assembled and disassembled many times, the construction convenience is good, and the steel sleeve can be recycled many times; although the manufacturing cost is high, the cost can be shared through repeated recycling, and a large amount of end reinforcing cost is saved; and the sectional assembling steel sleeve has more economic benefits especially on lines with more shield passing stations, and is suitable for being widely used and popularized.

The invention discloses a sealing and water stopping structure applied to a high-water-pressure unconsolidated stratum shield tunnel receiving tunnel portal and a construction method. The sealing and water stopping structure is arranged in an annular space between a steel segment and a tunnel portal outward-stretching ring beam, and comprises a bottom plate, an inner side fixing ring, an outer side fixing ring, an annular tightening inhaul cable and a stress application pressing screw rod; the outer side fixing ring is pre-buried in the tunnel portal outward-stretching ring beam; the inner side fixing ring is fixed to the bottom plate; the annular tightening inhaul cable is alternately arranged between the inner side fixing ring and the outer side fixing ring in a penetrating mode; and the stress application pressing screw rod is arranged on the tunnel portal outward-stretching ring beam. A steel cable+stress application screw+bottom plate structure is arranged between the tunnel portal ring beam and the steel segment, a space steel cable net is formed between the tunnel portal ring beam and the special steel segment after a shield receives through telescopic deformation of the structure, and water and soil pressure outside the tunnel portal is permanently resisted by injecting concrete, so that a shield receiving end stratum reinforcement measure is omitted, the construction cost is reduced, and the influence on the surrounding environment is reduced.