236results about How to "Guaranteed construction period" patented technology

The invention discloses a technology for constructing deepwater bridge underwater pier large-diameter bored piles in bead-stringed type karst areas. A pile foundation of a constructed underwater pier comprises the multiple first bored piles, and the first bored piles all penetrate through a plurality of karst caves successively from top to bottom. The technology includes the steps of (1) numbering the karst caves, (2) grouping the bored piles: dividing the multiple first bored piles into multiple groups according to serial numbers of the karst caves which are penetrated from top to bottom, and enabling the karst caves which are penetrated by all first bored piles in the same groups from top to bottom for the first time to be the same, (3) determining the drilling starting sequence: determining the drilling starting sequence of all first bored piles in the same group in the step (2), and enabling the drilling starting time of the first bored piles, farther away from the middle of the karst cave penetrated for the first time, in the same group to be earlier, and (4) carrying out drilling construction. The technology is simple in step, reasonable in design, low in investment cost, convenient to achieve and good in construction effect, and large-diameter bored pile construction processes can be easily, conveniently and rapidly completed with low cost and high quality.

The invention discloses a process for excavating and constructing soft rock tunnels. Each constructed soft rock tunnel comprises two tunnel portal sections and a tunnel trunk section. Each tunnel trunk section is arranged between the two corresponding tunnel portal sections in a connected manner, surrounding rock level of two tunnel portals of each constructed soft rock tunnel is V level, surrounding rock level of each tunnel trunk section is IV level, and entrances and exits of the constructed soft rock tunnels simultaneously start to be constructed and are constructed in opposite directions. The process includes constructing procedures of firstly, determining methods for excavating the tunnel trunk sections, to be more specific, simulating excavating and constructing procedures by the aid of tunnel excavating and constructing simulation software, and determining the methods for excavating and constructing the tunnel trunk sections according to simulation results; secondly, excavating and constructing the tunnels, to be more specific, dividing each soft rock tunnel to be constructed into a plurality of sections from the rear of the corresponding tunnel portal to the front and starting to excavate and construct the multiple sections. The tunnel trunk sections are excavated in the excavating and constructing procedures by the aid of full-section techniques. The process has the advantages of simple steps, reasonable design, convenience in construction, good service effects, safe constructing procedures and capabilities of easily and conveniently completing the soft rock tunnel excavating and constructing procedures and guaranteeing the construction periods.

The invention discloses a freeze construction method for wellbore type underground parking garage. A circular wellbore is built underground by sequentially using freeze construction, excavation construction, grouting and thaw grouting, and an elevator type and intelligent tower type stereo garage system currently applied at home and abroad is installed in the wellbore for operation. Before construction of the wellbore, an artificial freezing method is applied, water-bearing strata around the wellbore is frozen, a frozen wall having temporary load bearing and water isolating functions and meeting construction safety requirements is formed, and wellbore excavation is performed under protection of the frozen wall; the frozen wall is formed by mutual matching mutual complementing of inner ringfreezing holes and outer ring freezing holes; a cap beam is firstly constructed at the top of the wellbore; excavation construction of the outer wall of the wellbore, concrete pouring on the bottom plate of the wellbore and construction of the inner wall of the wellbore are performed in sequence; after freezing of the wellbore, lining is performed, and grouting and strata thaw are performed for grouting compensation.

The invention discloses a karst-area underwater bridge pier drilled pile construction method. The construction drilled pile passes through one or more karst caves from top to bottom according to the following steps that (1) measuring staking-out is conducted; (2) a steel protection barrel is put downwards and fixed; (3) drilling is carried out, namely, the steel protection barrel is put downwards and drilled from top to bottom through a percussion drill until the designed depth is reached, a slurry breast wall is adopted in the drilling process, when the drilled pile is drilled to enter the karst caves needing passing from top to bottom in the drilling process, an energy transfer method is firstly adopted to process the karst caves needing passing under the current state, then downward drilling is continuously carried out through the percussion drill; (4) a steel reinforcement cage is put downwards and concrete pouring is conducted. The karst-area underwater bridge pier drilled pile construction method is simple in step, reasonable in design, low in input cost, convenient to achieve, good in construction effect and capable of simply, conveniently and fast finishing the karst-area drilled pile construction process at a low cost in a high-quality mode.

The invention discloses a multi-node integral installation method for a steel truss beam, comprising the following steps: firstly, integral manufacturing is carried out in a factory, then the product is installed to form standard segments, the standard segments are temporarily fixed and pre-jointed in the factory, then the segments are transported to bridge location by large transportation equipment, integral lifting is carried out by a large lifting appliance and the segments are installed; the installation sequence is that firstly, a lower chord and an oblique web plate are installed, then a middle chord, an upper chord and a side upper chord are installed, at last, a lower lateral bracing, a lateral plate and a bridge deck in a welding way. The invention has the advantages that the linetype is easily controlled, the steel truss beam can be used as the operation platform, the installation speed is high, construction period is shortened and construction security is guaranteed.

The invention discloses a steel structure building construction method for pre-burying of foundation bolts. The steel structure building construction method comprises the following steps: 1. grouping of the foundation bolts: all the foundation bolts to be pre-buried are divided into a plurality of groups, the groups of the foundation bolts are respectively distributed in a plurality of bolt pre-burying areas in a concrete foundation, and the foundation bolts in each group form a bolt group; 2. grouped assembly of the foundation bolts: the bolt groups are respectively assembled, and the assembly procedure comprises manufacturing of a positioning mold, inserting of the foundation bolts, fixing of the foundation bolts, and separating of the bolt groups from positioning mold; 3. concrete cushion construction and pre-burying of fixing steel bars; 4. lower part fixing of the bolt groups; 5. binding of the steel bars and support arrangement of a template erection in the concrete foundation; 6. a position adjustment and upper part fixing of the bolt groups; 7. concrete foundation pouring. The method provided by the invention is simple in procedure, reasonable in design, convenient in implementation, and good in use effects, and has the advantages that the construction process for the high-precision pre-burying of the foundation bolts in the concrete foundation can be simply, conveniently and rapidly completed with high quality.

The invention discloses a boom-type roadheader for tunnel construction and a tunnel construction method. The boom-type roadheader comprises an engine-driven body, a boom, a milling and excavating head and a water spraying and dust removing device, wherein the boom is connected to the engine-driven body in an extensible and/or swingable manner, and the milling and excavating head is mounted at the free end of the boom in a rotatable manner. The water spraying and dust removing device comprises a plurality of nozzles around the boom and adjacent to the milling and excavating head, and the nozzles are in non-uniform distribution in the circumferential direction. When the boom-type roadheader is used for excavating and milling the cross section of a tunnel, segments and segment strips are set for milling and excavation. When each strip of each segment is excavated and milled, and when the distribution density of the nozzles on the bottom right of the milling and excavating head is set to be higher than that of the nozzles in other regions, the milling and excavating head is driven by the boom to move from left to right; when the distribution density of the nozzles on the bottom left of the milling and excavating head is set to be higher than that of the nozzles in the other regions, the milling and excavating head is driven by the boom to move from right to left.

The invention discloses a reinforced concrete building topdown method construction process, comprising the steps as follows: 1: the foundation, foundation and independent pile foundation construction is carried out; 2: a left supporting concrete column, a right supporting concrete column and a middle supporting concrete column of steel frame are established; 3: the areas between the left supporting concrete column and the middle supporting concrete column and areas between the right supporting concrete column and the middle supporting concrete column are used as hoisting passages of hoisting steel frame; each steel frame is hoisted onto the left supporting concrete column, the right supporting concrete column and the middle supporting concrete column; 4: all steel frames are hoisted on the left supporting concrete column, the right supporting concrete column and the middle supporting concrete column; after the connection and fixing operation, all steel frames are used as the roof of the reinforced concrete building; 5: in the roof, the indoor concrete frame structure is constructed. The method of the invention firstly constructs the side frame and the middle frame column structure, subsequently carries out the hoisting of the steel frame, and constructs the reinforced concrete structure in the clean area after the roof surface has no water, thus saving the construction period, reducing the cost, ensuring the safety hoisting, overcoming the effect of weather and ensuring the construction period and the construction quality.

The invention relates to a girder type of a segment assembled type combined highway and railway cable-stayed bridge with inconsistent bridge deck widths of a highway and a railway. A girder is composed of a main truss, an auxiliary truss, a highway bridge face and a railway bridge face. The upper-layer bridge face is wide, the lower-layer bridge face is narrow, the width of the main truss is determined by the railway bridge face, and the width of the auxiliary truss is determined by the highway bridge face. Supporting rods for supporting the highway bridge face on the two sides are arranged on a main truss bottom chord in a suspension mode. Auxiliary truss upper chords and the supporting rods form the auxiliary truss together. Stay cables are anchored on the auxiliary truss upper chords through anchor tensile plates. The highway bridge face is welded to main truss upper chords and the auxiliary truss upper chords. The railway bridge face is welded to main truss bottom chords. The upper ends and the lower ends of flange plates of the auxiliary truss supporting rods are welded to the auxiliary truss upper chords and the main truss bottom chords respectively. Web plates of the auxiliary truss upper chords and the flange plates of the auxiliary truss supporting rods are identical in inclined angle. The segment assembled type combined highway and railway cable-stayed bridge with the inconsistent bridge deck widths of the highway and the railway is simple in structure, economical in manufacturing cost and clear and direct in stress, is manufactured by welding whole segments in a factory, and is assembled and erected through the whole segments on a construction site, the construction difficulty in the severe environment of straits is greatly lowered, and the bridge is adopted in the combined highway and railway cable-stayed bridge of the Pingtan strait.

The invention discloses a subway station body structure and a four-joint-arch PBA underground excavation construction method thereof. The subway station body structure comprises a station inner body structure, multiple left piles, multiple right piles, three sets of middle columns, middle plates and body arches. The body arches are four-joint arches. The construction method comprises the steps of pilot tunnel excavation and primary support; horizontal base and bottom longitudinal beam construction; side pile and middle column construction; crown beam, top longitudinal beam and pilot tunnel inner arch section construction; first and third arch section primary support buckle arch construction; second and fourth arch section primary support buckle arch construction; secondary lining structure construction of first and third arch sections; secondary lining structure construction of second and fourth arch sections; excavation of the upper portion of the station inner body structure, and secondary lining construction of the middle longitudinal beams, the middle plates and the upper portion of the side wall; earth excavation of the lower portion of the station inner body structure and secondary lining construction of bottom plates and the lower portion of the side wall. The construction is easy, the construction progress is fast, the subway station body structure constructed and formed is firm, and the using effect is good.

The invention discloses a construction method for a bored pile of a subway station enclosure structure of upper-soft lower-hard ground. The method includes the steps that firstly, measurement and paying-off are conducted, wherein measurement and paying-off are carried out at a pile position of the bored pile to be constructed, and the bored pile to be constructed is a cast-in-place pile constructed and formed in the upper-soft lower-hard ground; secondly, a steel casing is buried, wherein the steel casing is buried in the soft ground where the bored pile to be constructed is located; thirdly, drilling construction of pile holes is conducted; fourthly, a steel rib frame is laid down; fifthly, concrete pouring construction is conducted; sixthly, the steel casing is detached; seventhly, the bored pile is formed. Drilling construction of the pile holes includes the steps that 301, drilling construction is conducted on an upper pipe hole section and 302, drilling construction is conducted on a lower pile hole section, wherein the lower pile hole section is subjected to drilling construction by being divided into multiple pile hole section bodies from top to bottom, and when any hole section body is subjected to drilling construction, drilling for cores and secondary overcoring are conducted. The method is simple, design is reasonable, construction is easy and convenient, drilling difficulty of the pile holes is low, the use effect is good, and the bored pile construction process of the upper-soft lower-hard ground can be easily, conveniently and quickly completed.

The invention provides a modified thixotropic slurry. The slurry comprises components of, by mass, 100 bentonite, 80 to 110 water, 8 to 15 sodium carbonate, 60 to 100 white plaster, 0.5 to 2 parts of flocculant and 0.2 to 0.4 of emulgator. The invention further provides a preparation method of the modified thixotropic slurry. The modified thixotropic slurry is provided with resistance reduction thixotropy and solidification properties and good consistence and can form outstanding slurry sleeves to produce certain support, and accordingly, the safety and the reliability of the soil mass on the upper portion during jacking of jacking pipes can be guaranteed, and soil mass collapse and road surface sinking are prevented.

The invention discloses a multi-span box girder integral ultrahigh alternate jacking construction system and method. By controlling two groups of jacks capable of positively applying a jacking force, after jacking of one group of jacks is finished, the jacking force of the group of jacks is uniformly linearly transferred to the second group of jacks for performing alternate continuous jacking operation. The overpass bridge ultrahigh alternate jacking construction solution can ensure that during jacking, a bridge structure is safe, the jacking precision and a line type after the whole bridge fall down meet design demands, a construction period is ensured, building energy consumption is reduced and an urban ecological environment is met.

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 belongs to the technical field of device state monitoring, and provides a shield/TBM online state monitoring system. The shield/TBM online state monitoring system comprises mechanical-signal collection apparatuses and an oil-liquid-parameter-signal collection apparatus; the multiple mechanical-signal collection apparatuses are pasted on a shield/TBM; signals collected by the multiple mechanical-signal collection apparatuses are fed into a data concentration center and processed through a data collection conversion module; the oil-liquid-parameter-signal collection apparatus comprises a hydraulic-oil-parameter-signal collection apparatus body and a lubricating-oil-parameter-signal collection apparatus body; signals collected by the hydraulic-oil-parameter-signal collection apparatus body and the lubricating-oil-parameter-signal collection apparatus body are directly fed into the data concentration center and processed; the shield/TBM online state monitoring system also comprises a data calling module; the data calling module is communicated with the data concentration center. According to the shield/TBM online state monitoring system, real-time monitoring of the device working state is achieved, and a technology guarantee is provided for safer and more reliable construction, and the information level of engineering management is improved.

The invention relates to a construction method for reverse construction of a continuous wall encountering an underground pipeline. The method includes the steps: determining a continuous wall range in which the pipeline cannot be removed and reconstructed, and adjusting continuous wall framings; performing continuous wall construction on two sides of a reverse construction range, wherein the construction includes joint soldering of one side close to the pipeline, reverse construction range water stoppage and reinforcement outside a foundation pit at the joints by jet grouting piles; excavating soil within the pipeline range, performing step excavation, performing suspension protection treatment on the pipeline in the depth range, and constructing the continuous wall in the reverse construction range every one step of excavation, wherein the continuous wall comprises main layout reinforcements and distribution reinforcements; performing sprayed concrete construction, covering and reinforcing a sprayed concrete surface layer with steel plates which are welded with I-beam joints on two sides of the reverse-construction continuous wall; excavating to a base, disposing an I-beam base, and spraying concrete to form a seal bottom. By the steps, the construction method for reverse construction of the continuous wall encountering the underground pipeline is realized, so that pipeline removal and reconstruction cost is saved, and good effect of a construction period is guaranteed.

The invention relates to bridge construction technology, in particular to a horizontal swivel structure and a construction method of a super-large tonnage asymmetric composite girder cable-stayed bridge. It includes concrete foundation piles, caps, turntables and swivel slide rails. The caps are divided into upper caps and lower caps. The swivel slides are divided into legs and slideways. For supporting feet, the lower bearing platform is provided with a lower turntable, a positioning pin shaft and a slideway, the upper turntable is connected with the lower turntable through a positioning pin shaft, the upper turntable is bonded to the lower turntable, and the braces are fitted to the slideway. The present invention has significant effects on solving the problems of complex horizontal swivel construction process and high construction cost of large-tonnage, asymmetric mixed-girder cable-stayed bridges, and also has many advantages such as simple construction procedures, fast construction speed, safety and reliability, and low engineering cost. advantage.

The invention discloses a foundation strengthening treatment method comprising the following steps of drilling, washing, backfilling, carrying out high-pressure supplementary grouting and checking the quality. The drilling step mainly comprises the steps of drilling a main washing hole and/or an auxiliary washing hole; and the washing step mainly comprises the steps of washing, backfilling and carrying out high-pressure supplementary grouting under regulated conditions. The foundation strengthening treatment method disclosed by the invention effectively solves the strengthening treatment problem of a geological defect part which cannot be dug, solves impermeable treatment engineering and even can replace digging; the foundation strengthening treatment method solves the technical difficulty of relative engineering in the similar complicated engineering, shortens the work period, improves the engineering quality, reduces the engineering cost, saves the building investment of a hydropower station and guarantees the safety of a construction period and an operation period of the power station; and the foundation strengthening treatment method has important real guide meanings to supporting engineering, is used for accumulating data and providing reference to the similar engineering and the relative engineering, and has a wide application prospect in national western hydroelectric development and construction.

The invention discloses a combined lining formwork trolley for a subway station. The combined lining formwork trolley comprises a movable supporting system and a formwork assembly, wherein the movable supporting system is composed of a plurality of longitudinal moving trolley bodies capable of moving in the subway station under construction, the formwork assembly is arranged on the movable supporting system and conducts molding construction on secondary linings of the subway station under construction, and the longitudinal moving trolley bodies are arranged in the same horizontal plane from left to right; the formwork assembly comprises a combined top formwork and two side formworks, the two side formworks are symmetrically arranged on the left side and the right side of the combined top formwork respectively, and the combined top formwork comprises a plurality of trolley supporting top formworks mounted on the longitudinal moving trolley bodies respectively and middle connecting formworks connected between every two trolley supporting top formworks which are adjacent in a left-right mode; the middle connecting formworks are horizontal connecting formworks or groove type combined formworks. The combined lining formwork trolley is simple in structure, reasonable in design, easy and convenient to use and operate, good in usage effect and capable of solving the problems that construction is complex, the construction efficiency is low, the occupied space is large and the use effect is poor when a traditional subway station lining construction method is adopted.

The invention discloses a complex geological karst hole pile foundation construction process. The complex geological karst hole pile foundation construction process comprises the steps that a concrete backfilling karst cave pile foundation construction method or a double-steel-casing all-casing follow-up pile foundation construction method is adopted to perform hole pile foundation construction; when the karst cave where the karst cave pile foundation is located is a small karst cave, hole pile foundation construction is carried out through a concrete backfilling karst cave pile foundation construction method; and when the karst cave where the karst cave pile foundation is located is a large karst cave or a communicating type bead string karst cave group, hole pile foundation construction is carried out through the double-steel-casing all-casing follow-up pile foundation construction method. The conditions of mud loss, wall protection instability and the like of a traditional construction method can be effectively avoided, the construction safety can be effectively guaranteed, the construction period is guaranteed, and meanwhile, the construction cost can be reduced.

The invention relates to a cementing double-R groove-shaped lead stringing pulley with a double-R groove-shaped pulley groove selection, which is composed of two types of circular arc with different radii. One circular-arc-shaped groove with a short radius is formed at the bottom of the arc-shaped groove with a large radius and a cementing layer is arranged on at least the internal surface of the arc-shaped groove with small radius. Cementing plays a certain role in protecting the lead. The service life of the lead stringing pulley is prolonged. The radii of the big and the small circular arcs are respectively matched with the radii of a connecting pipe protecting device and the lead, thereby enlarging the contact area between the lead and the pulley groove of the lead stringing pulley when the lead passes through a connecting pipe protecting device, and reducing the wear of the lead. At the same time, the small arc-shaped groove has a depth enough to avoid construction accident caused by the lead which leaves out of the pulley groove of the pulley during the stringing process. Therefore, the lead stringing pulley has the advantages that the wear of the lead is reduced, the service life of the lead stringing pulley is prolonged, the safety of stringing construction is improved and the maintenance cost of engineering is reduced.

The invention discloses a construction technology for a building foundation and a main structure. A constructed building is of a frame structure or a frame shearing wall structure. The technology includes the steps: firstly, constructing pile foundations; secondly, constructing reinforced concrete structures of the constructed building with a plurality of floors from bottom to top; and thirdly, constructing masonries. The pile foundation construction process includes: constructing cast-in-situ bored piles; performing waterproof treatment for pile heads; constructing fine aggregate concrete protection layers; and constructing foundation slabs. When the reinforced concrete structure of any floor of the constructed building, firstly, a bearing structure of the currently constructed floor is poured, and secondly, floor slabs of the currently constructed floor are poured. After the reinforced concrete structures are constructed, filler walls on the floors are constructed. The construction technology is simple in step, reasonable in design, high in operability, convenient to implement and fine in construction effect, and the construction quality of the building can be effectively ensured while construction period is ensured.

The invention discloses a fence linkage block. The outline of the fence linkage block is a rectangular block, the left and right symmetrical lateral surfaces are planes, the front and rear symmetrical lateral surfaces are linkage surfaces, the bottom is a plane, and the top is a plane or a rough plane; the fence linkage block is provided with a communicated fence water pervious strip hole from the top to the bottom; and the linkage surface comprises a middle section and two end sections, the middle section is up convex and down concave or up concave and down convex, the two end sections are up concave and down convex or up convex and down concave, the formation length of each of the two end sections is 1/2 of the formation length of the middle section, and the heights of the concave part and the convex part of the corresponding middle section and two end sections on the same horizontal height are equal. A production process of the fence linkage block comprises the following steps of: selecting and proportioning concrete raw materials, and preparing concrete; pouring the concrete into a set die; curing; and detaching the external die. By organically combining three aspects of roughening wave dissipation, fence board wave dissipation and building block space linkage to improve the stability of a protected slope, the slope wave dissipating efficiency of a dam is improved, the thickness of the protected slope is optimized, deformation of the dam slope can be well adapted, and the construction is facilitated.

The invention discloses a BIM technology-based integrated pipeline overall assembly method, which comprises the steps of creating a BIM model according to a drawing, then carrying out collision detection, and carrying out collision check by utilizing the BIM model, thereby being convenient, rapid, high in efficiency and low in error rate; carrying out three-dimensional visual disclosure on construction personnel by utilizing the BIM model, visually displaying the construction process, and ensuring that technical disclosure is in place; splitting the created model; after comprehensive pipeline segmentation is completed, carrying out pipeline and support coding, completing output of a material detail list and output of a machining drawing, carrying out accurate ordering according to the material detail list and the machining drawing, wherein material losses are low; enabling all pipelines to be subjected to factory prefabrication and assembly construction, so that the construction efficiency is improved; and transporting comprehensive pipelines in place at a time and installing the pipelines at a time, manpower, so that material resources and construction cost are saved, and the construction period is guaranteed.