102results about How to "Reasonable construction" patented technology

The invention discloses a concentrated drainage device and method of tunnel engineering, which comprises the following parts: water diversion pipe, filter layer on the outside of water diversion pipe, funnel under the initial support water diversion pipe, screen under the funnel and drainage pipe under the screen, wherein the water diversion pipe is set in the water diversion hole d of tunnel adjacent bed creepage centralization part. The method comprises the following steps: drilling the water diversion hole d in the tunnel initial support and tunnel adjacent bed creepage centralization part; leveling the initial support surface; setting the concentrated drainage device in the tunnel engineering.

The invention discloses a construction method for enabling a shallowly buried and darkly excavated tunnel to pass through a cottage area. The construction method comprises the following steps: excavating a tunnel hole of the constructed shallowly buried and darkly excavated tunnel from back to front through a step excavation process, and performing preliminary bracing on the tunnel hole formed by excavating from back to front in an excavating process, wherein the tunnel hole consists of an upper guide hole and a lower guide hole positioned right below the upper guide hole, the rear part of the tunnel hole is connected with a vertical well, the preliminary bracing structure of the tunnel hole comprises a plurality of grating steel frameworks for supporting the tunnel hole from back to front, a layer of bar-mat reinforcement suspended on the inner wall of the tunnel hole and a concrete layer jetted on the inner wall of the tunnel hole. The process for excavating the tunnel hole of the shallowly buried and darkly excavated tunnel comprises the following steps: I, excavating the initial segment of the upper guide hole; II, excavating the initial segment of the lower guide hole; III, synchronously excavating the upper and the lower guide holes. The construction method disclosed by the invention is simple in step, reasonable in design, convenient in construction, good in construction effect, capable of simply completing the construction process of the shallowly buried and darkly excavated tunnel that passes through the cottage area, and safe and reliable in a construction process.

The invention relates to a test method for simulating variation of a permeability coefficient of foundation pit precipitation soil, which comprises the following steps of: cutting an undisturbed sample by using a cutting ring and sticking filter paper at both ends of the sample; communicating an osmoticpressure container with a seepage pipeline and a seepage metering pipe to make porous stones in the whole pipeline and the osmoticpressure container subjected to sufficient exhaust saturation, and closing a valve; arranging the cutting ring with the undisturbed sample into the osmoticpressure container in a mode that the cutting edge is upward, sleeving a water stop ring and a directed gasket outside the cutting ring, compressing the water stop ring and the directed gasket and arranging the porous stones and a pressure transmitting piston at the upper end of the sample; carrying out two-stage consolidation on the sample through a pressure regulating valve, wherein the first consolidation makes the sample recovered into a natural geostatic stress state of soil mass and the second consolidation simulates the stress state of the soil mass after precipitation; and after completing consolidation, opening a seepage valve and starting a subsequent seepage test. Influences of the decrease of moisture content of the foundation pit precipitation soil, the increase of effective stress and the consolidation of soil on the permeability coefficient are considered, and the method provides a basis for accurate selection of the permeability coefficient of the foundation pit precipitation soil so as to provide guarantee for designing and constructing a soft watery deep foundation pit safely, economically and reasonably.

The invention discloses a composite pile and a construction method thereof. The composite pile comprises a first pile as a peripheral pile, and a second pile as a core pile, wherein the first pile is a cast-in-situ pile; a second pile is a cast-in-situ pile or a precast pile; a centre distance d between the first pile and the second pile is equal to 0; area ratio S of the second pile to the first pile is S2/S1; length ratio L of the second pile to the first pile is L2/L1, wherein S belongs to (0, 1), and L is more than 0.5. According to the invention, construction is convenient and reasonable; proper construction devices and construction processes are selected according to stratum conditions, site conditions, ambient environment and work amount; tube sinking and tube drawing systems can be a set of device, and also can be different independent devices; a pile is constructed integrally by a device, and also is constructed by a plurality of devices; and a plurality of devices operate in a flow line.

The invention relates to a grouting process for a working surface of a deep well, which comprises a pore forming process and a grouting process and is characterized by comprising the following steps of: firstly, after the height of a tunneling section of a grout stop pad meets the requirement, carrying out drilling and water exploration on a lower rock stratum by using an umbrella drill; secondly, arranging a large lining formwork in the tunneling section of the grout stop pad and then constructing a drilling platform by utilizing the large lining formwork; thirdly, embedding an orifice pipe, a water filtering bucket and a water filtering layer and pouring concrete; and finally, perforating pressure relieving holes on the grout stop pad and carrying out drilling and grouting operation. The grouting process for the working surface of the deep well is reasonable, can have universality, can improve the working efficiency of the pre-grouting operation of the working surface of the deep well, guarantees that the waterproofing construction of a mineshaft is carried out successfully, and has a short grouting period and low construction cost.

The invention discloses a building roof construction process. A construction roof comprises a roof structure plate, a parapet wall and a roof surface layer, wherein the parapet wall is arranged above the roof structure plate, the roof surface layer is paved on the roof structure plate, a roof exhaust system is arranged on the construction roof and comprises a plurality of first horizontal exhaust pipes, the first horizontal exhaust pipes are respectively laid in a slope finding layer or a heat insulation layer in the roof surface layer, two ends of each first horizontal exhaust pipe are respectively connected with a vertical exhaust pipe, and the vertical exhaust pipes are embedded in the side walls of the parapet wall and a discharge flue or the side wall of an exhaust passage. The construction process of a construction roof comprises the steps of 1, surveying and setting out; 2, parapet wall, discharge flue and exhaust passage construction; 3, horizontal exhaust pipe positioning installation; 4, exhaust pipe connection; 5, roof surface layer construction; and 6, rigid protecting layer mesh division and caulking construction. The construction process has the advantages that the steps are simple, the operability is high, the realization is convenient, in addition, the work efficiency is high, the construction effect is good, and the construction quality of the construction forming building roof can be effectively ensured.

The invention relates to a high yield culturing method for Chinese mitten juvenile crabs. The method is characterized by comprising the steps of construction of a juvenile crab culturing pool, feeding of water, sterilizing, basket hanging and juvenile crab distributing of parent crabs, feeding of baits and regulating and control over water quality and water temperature. In the high yield culturing method, the juvenile crab culturing pool is reasonably constructed and is set to be in a rectangular shape in the north and south direction, the juvenile crabs are not high-densely clustered in the morning and at night, and the survival rate of the juvenile crabs is greatly improved. Rotifer living bodies are adopted as the baits, the water quality is not easy to deteriorate, and the water exchange quantity is greatly reduced. The juvenile crab culturing and emergence can be realized in advance, the emergence is realized by 20 days earlier than that of the traditional soil pool juvenile crab culturing method, and demands of partial areas on early juvenile crabs are met; the temperature of natural water is lower because of the juvenile crab culturing in advance, and the prevention and control difficulty over diseases is greatly relieved as much pathogenic microorganisms are not revived yet.

The invention discloses a construction method of an expanded-head prestressed concrete anchor rod. The anchor rod is formed by pouring and solidifying an anchor rod framework system and prestressed concrete. The construction method comprises the specific construction implementation steps of conducting drilling and positioning; drilling a hole to a designed depth, carrying out jet grouting or mechanical reaming construction to form a hole, and lowering a pull rod, namely a main rib, of the anchor rod and an expanded head framework or a fixed-diameter anchor head framework; after the pull rod, namely the main rib, of the anchor rod, an expanded head and the expanded head framework are in place, expanding the expanded head to the designed size through an expansion mechanism, and then formingthe pouring concrete on the expanded head, namely an expansion body section and a non-expansion body section until the rated strength required by design and specifications are reached; enabling the pull rod, namely the main rib, in the anchor rod to use a device and method capable of applying prestress to apply prestress to the main rib; applying the prestress required by the design and specifications, conducting locking after operation is completed, and then removing the to-be-removed equipment device for applying the prestress; and enabling a whole part of the anchor rod to be composed of the poured concrete and an anchor rod framework body.

The invention discloses a method for beyond-limit arch replacing construction during preliminary bracing of a large-section loess tunnel. The method includes the steps of firstly, conducting radial grouting reinforcement on an arch wall, wherein radial grouting reinforcement is conducted on an arch replacing required section where arch replacing is required in the constructed loess tunnel from back to front; and secondly, conducting arch replacing construction, wherein a reinforced preliminary bracing structure in the arch replacing required section is detached, and preliminary bracing construction is conducted on the arch replacing required section synchronously in the detaching process. The method is simple in step, reasonable in design, simple in construction and good in use effect; theradial grouting reinforcement is conducted on the arch wall to reinforce the arch wall of a tunnel hole first, so the structural stability of the tunnel in the arch replacing process is ensured; segmented reinforcing is conducted on the preliminary bracing structure of the tunnel through a plurality of sleeve arch units for a reinforced sleeve arch in the arch replacing required section, so detaching is convenient; and moreover, the sleeve arch units are complementary and together improve the supporting force, so the adverse effects on the structural stability of the tunnel in the detaching process of each sleeve arch unit can be effectively reduced, and the safety and reliability of the arch replacing construction process are ensured.

The invention discloses a demolition construction method for an overpass existing line arch bridge. The demolition construction method comprises the steps: 1, erecting a protective shed frame; 2, carrying out static crushing demolition on the arch blasting demolition structure; 3, manually removing the blasting protection layer; 4, cutting the removed arch ring; 5, hoisting the arch ring to be hoisted; and 6, dismantling the under-arch structure. The method is simple, reasonable in design, easy and convenient to construct and good in using effect; the protection shed frames fixed to the frontside and the rear side of the removed arch bridge are adopted for effective protection, meanwhile, the structure on the arch of the removed arch bridge is removed in the mode that static crushing andmanual chiseling are combined, it is guaranteed that a plain concrete arch ring cannot be damaged in the static crushing process, and an existing spanned railway line cannot be disturbed. After the arch ring is exposed, the removed arch ring is cut and decomposed through a rope saw and then hoisted and removed, then the under-arch structures on the left side and the right side are rapidly removed,the construction period can be effectively shortened, the arch bridge removing efficiency is improved, and the removing process is safe and reliable.

The invention discloses a method for preventing fissures of a large concrete pool. According to the method for preventing the fissures of the large concrete pool, the temperature difference, the materials of concrete and construction of the concrete are controlled, and then temperature rising of the concrete is reduced, the rate of temperature fall of the concrete is reduced, contraction of the concrete is reduced and ultimate tensile strength of the concrete is achieved to further control the fissures of the large concrete pool during construction. When the method is used for controlling construction, the fissures of the large reinforced concrete pool can be effectively prevented from being generated, construction quality is improved, and construction can be carried out reasonably and effectively.

The invention discloses a manufacturing method and a structure for a basement floor without crack, leakage and with an oversized area. According to the method and the structure, disclosed by the invention, a concrete self waterproof floor board layer is firstly poured, and the concrete self waterproof floor layer is poured by adopting leakage resisting concrete; a drain board layer made from high impact polystyrene (HIPS) is paved on the concrete self waterproof floor board layer; then, a plain concrete leveling layer is poured on the drain board layer; a reinforced concrete layer of which the thickness is from 160 to 260mm is poured on the plain concrete leveling layer, the reinforced concrete layer is divided into small integrated reinforced concrete layers by expansion joints, and extruded polystyrene board materials are filled in the expansion joints; a polyurethane coating layer is painted on each small integrated reinforced concrete layer of the reinforced concrete layer, and silicone weather-proof glue is filled in a gap between every two adjacent polyurethane coating layers. The structure has the advantages of difficulty in sinking, no crack, no leakage and the like.

An overturning and folding device for a handlebar includes a tube (2) extending vertically from the handlebar base (13), a connecting member (15) next to the base (13), an eccentric axle (1) and a lug bolt (12). A first hole (21) in the axial direction and a second hole (20) in the perpendicular direction relative to the first hole are formed at the handlebar base (13) of said tube (2), which communicate with each other. The connecting member (15) is engaged to the fork of the bicycle, which defines a space (14) through which the lug bolt (12) can rotate from an axial position to a perpendicular position. The lug bolt (12) is fixed within the first hole (21) and space (14) by a fastener (8). The eccentric axle (1) is fitted rotatable in the second hole (20) and a third hole (5) on the head of the lug bolt (12).

The invention relates to an automatic continuous monitoring system for subway deep tunnel engineering construction safety, which belongs to the field of tunnel construction safety monitoring and earlywarning, and comprises a sensor unit, a data acquisition and transmission unit, a data processing and control unit and a construction safety evaluation program module, the sensor unit collects displacement, strain, settlement and inclination angle monitoring information; the data acquisition and transmission unit comprises a sensor wireless data transceiver and a wireless data relay transceiver and is used for wirelessly transmitting and receiving inclination angle monitoring information among all the units; the data processing and control unit comprises a computer, and the construction safety assessment program module performs wavelet packet analysis on at least one of displacement, strain, settlement and inclination angle monitoring information data when executed by the computer, and identifies the occurrence time, damage position and damage degree of tunnel structure damage. The method has the advantages of real-time performance, convenience, high efficiency and accuracy.

The present invention relates to a gypsum hollow plate concrete-poured wall body and its construction method. Said method includes the following steps: on a floor slab relatively vertically setting perforated gypsum hollow plate material; in the middle portion, along the perforated gypsum hollow plate material relatively-parallelly and equidistantly setting several ribs of plate so as to form several hollow holes in the middle portion of the hollow hole relatively-parallelly setting several vertical steel bars, pouring concrete into hollow hole to form poured core column, the lower end portion and upper end portion of the poured core column are respectively connected with the upper portion of floor slab ring beam and lower portion of floor slab ring beam so as to obtain the whole body building. Said invention adopts the environment-protecting type material as form, and can shorten construction period.

The invention provides a fan drainage structure which comprises an annular drainage ditch arranged along a fan tower and radial drainage ditches connected with the annular drainage ditch. The annular drainage ditch is located at the top of a fan foundation, the ditch wall of the annular drainage ditch is connected with the fan tower through a waterproof roll, and the interior of the annular drainage ditch and the interior of each radial drainage ditch are each covered with a waterproof layer. The invention further provides a drainage method of the fan drainage structure. The drainage process is integral, rainwater flowing down along the fan tower can be drained in time through the radial drainage ditches and the annular drainage ditch, the situation that a large amount of rainwater washes soil covering the fan foundation is avoided, and the requirements for the designed covering soil weight and water and soil conservation of the fan foundation are met. In addition, the invention provides a manufacturing method of the fan drainage structure. The manufacturing method is simple and easy to implement.

The invention provides a compacting grouting method. The compacting grouting method comprises the following steps of drilling grouting holes in a standard block of an annular pipe sheet, wherein the grouting holes comprise the first set of grouting holes, the second set of grouting holes and the third set of grouting holes which are symmetrically distributed from bottom to top in sequence; installing sleeve valve pipes in all the grouting holes, and installing one-way valves at the upper ends of the sleeve valve pipes; adopting rapid hardening cement mortar to seal the gaps formed by outer walls of the grouting holes and the outer walls of the sleeve valve pipes; conducting symmetric grouting on the first set of grouting holes, the second set of grouting holes and the third set of groutingholes from bottom to top in sequence; after grouting is finished, checking the grouting effect, and conducting hole patching grouting for unqualified sections; after grouting construction is finished, immediately cleaning the sleeve valve pipes, a grouting machine and an agitator. By means of the compacting grouting method, the grouting efficiency can be improved, and the stability of structuresof the two sides of a tunnel is guaranteed, so that a subway is steadily run.

The invention relates to a pavement structure for a traffic road. The pavement structure for the traffic road comprises a steel-concrete combined pavement, an asphalt concrete pavement and a base layer arranged on the steel-concrete combined pavement and the asphalt concrete pavement. The steel-concrete combined pavement and the asphalt concrete pavement are laid on the base layer. A road parting line arranged in the extending direction of the road is arranged between the steel-concrete combined pavement and the asphalt concrete pavement. A road shoulder is arranged on the edge of the outer side of the steel-concrete combined pavement. By the adoption of the pavement structure for the traffic road, the passage capacity of the road is improved, and the service life of the road is prolonged.

The invention discloses a mooring device for a floating body in a middle-shallow water area and an installation method. The mooring device comprises at least three mooring assemblies, each mooring assembly comprises a horizontal catenary, a buoy, at least two mooring cables and pile foundations, the number of the pile foundations is the same as that of the mooring cables, and one mooring cable corresponds to one pile foundation; the first end of the horizontal catenary is connected with the buoy, the first end of each mooring rope is connected with the buoy, and the second end of each mooring rope is connected with the corresponding pile foundation. When the mooring assemblies are used for mooring the floating body in the middle-shallow water area, the mooring assemblies are evenly distributed on the periphery of the floating body, the second end of the horizontal catenary is connected with the floating body, the buoy floats on the sea surface, and the pile foundation is vertically fixed to the seabed mud surface and extends downwards. The large horizontal restoring force can be provided, meanwhile, the mooring radius can be reduced, construction is easy, installation is convenient, the foundation manufacturing cost is low, and a more reliable and more economical mooring solution is provided for mooring of the floating system in the middle-shallow water area with the water depth of 30-100 m.

The invention discloses a top plate ejecting system for ejecting closure section of a continuous rigid frame bridge and a construction method thereof. The top plate ejecting system comprises two groups of top plate pre-buried bases, a rigid support structure and an ejecting mechanism, wherein the two groups of top plate pre-buried bases are respectively arranged at two cantilever beam section ends of the continuous rigid frame bridge; the rigid support structure is supported between the two groups of top plate pre-buried bases; the ejecting mechanism is used for ejecting the rigid support structure; each group of top plate pre-buried bases comprises a left top plate pre-buried base and a right top plate pre-buried base arranged on the same cantilever beam sections; the rigid support structure is a longitudinal ejecting support structure or an oblique ejecting support structure; one end of the rigid support structure is a fixed end, and the other end of the rigid support structure is an ejecting end. The construction method comprises the following steps: step one, constructing the top plate pre-buried bases; step two, mounting the ejecting mechanism; and step three, mounting the rigid support structure. The top plate ejecting system is reasonable in design, simple and convenient to construct and good in using effect; the process of ejecting the cantilever beam sections of the closure section can be simply, conveniently and quickly completed; and the requirements on correction of lateral deviation and torsion deviation of the cantilever beam sections can be met.

The invention discloses a building integral and synchronous descent construction device, and belongs to the field of buildings. According to the technical scheme main point, the building integral andsynchronous descent construction device comprises two sets of racks, top supporting parts, supporting brackets, and submergence brackets, wherein the racks are symmetrically mounted and fixed in settlement grooves excavated on the periphery of a building; the top supporting parts are arranged on the racks for supporting a base of the building; the supporting brackets reinforce the building; the submergence brackets support the building after the top supporting parts settle the building, when it is necessary to synchronize descent of the building, an operator can fix the racks in the excavatedsettlement grooves, the supporting brackets are used for integral reinforcing the building, the top supporting parts on the racks are used for integral supporting the base of the building and then settlement is conducted. The building integral and synchronous descent construction device has the advantages of being simple in operation and the settled building structure is not prone to collapse.