282results about How to "Control construction quality" patented technology

The invention relates to a method for carrying out deepwater laying on large-volume reinforced mud-filling tubular bags by using geotextiles-laying vessels, which comprises the following steps of: carrying out measurement on the underwater terrain by using a GPS (global position system), drawing a cross-section diagram, and marking an embankment axis and a construction side line in a construction area; determining the length of the mud-filling tubular bag according to the measured data and the size of a cross section, determining the width of a bag body according to the length of a roller, and sewing a reinforced belt on the surface of the bag body, wherein the bag body is provided with a mud inlet; rolling the mud inlet of the mud-filling tubular bag inwards on the roller; anchoring a geotextiles-laying vessel with the rolled bag body on the construction side line, and preparing a sand carrier and a sand blowing pump; filling the head part of the mud-filling tubular bag firstly, placing the mud-filling tubular bag on the construction side line, moving the mud-filling tubular bag and continuing to fill the mud-filling tubular bag until the mud-filling tubular bag is completely submerged in an original beach face or on the lower bag body, and then taking back a connecting rope; moving the vessel transversely, and laying the next mud-filling tubular bag. The method disclosed by the invention is accurate in positioning; through carrying out reinforcement treatment on mud-filling tubular bags, the strength of bag bodies is significantly increased, and the influence on construction caused by rising and falling tide is small; and the construction is assisted by using large vessels, so that the operating risk of workers is reduced, and the construction efficiency is improved.

The invention discloses a main structure for a metro long-span station and a pillar arching construction method thereof. The main structure comprises a station interior main structure, a plurality of middle pillars, a middle plate and a main arch part, wherein the station interior main structure is dug; the middle plate is located on the middle pillars; the main arch part is located right above the main structure; a bottom longitudinal beam is arranged at the bottom of the station interior main structure; a top longitudinal beam is arranged on the main arch part; and a middle longitudinal beam is arranged between adjacent middle pillars. The construction method comprises the following steps: 1) preparing in earlier stage; 2) digging a guiding hole and performing primary bracing and bridging construction; 3) constructing the bottom longitudinal beam, the middle pillars and the top longitudinal beam; 4) constructing a primary branch arch and refilling an arch back; 5) performing arch secondary lining construction; 6) digging the upper part of the main structure and constructing a primary branch of a side wall of the upper part; 7) performing secondary lining construction of the middle longitudinal beam, the middle plate and the side wall of the upper part; 8) digging the lower part of the main structure and constructing the primary branch of the side wall of the lower part; and 9) performing secondary lining construction for a base plate and the side wall of the lower part. The construction method provided by the invention has the advantages of reasonable design, simple construction step, convenience in realizing, small construction difficulty and high construction speed.

The invention discloses a guiderail device and method for pouring a slope roof and relates to the technical field of building engineering construction. The guiderail device comprises plate-bottom steel reinforcing bars laid on the top surface of the form board of the slope roof. Plate-surface steel reinforcing bars opposite to the plate-bottom steel reinforcing bars are disposed above the plate-bottom steel reinforcing bars. A plurality of cushion blocks are disposed between the plate-bottom steel reinforcing bars and the form board of the slope roof. A plurality of horse stool steel reinforcing bars and a plurality rows of guiderail support steel reinforcing bars are disposed between the plate-bottom steel reinforcing bars and the plate-surface steel reinforcing bars. A guiderail steel reinforcing bar is fixedly connected to the top surface of each row of guiderail support steel reinforcing bars, and a steel wire mesh is fixedly connected to the bottom of the guiderail steel reinforcing bar. When the guiderail device is used for pouring, the plate-bottom steel reinforcing bars are laid first, the cushion blocks are placed between the plate-bottom steel reinforcing bars and the form board, then the horse stool steel reinforcing bars are fixed and the plate-surface steel reinforcing bars are laid, the guiderail support steel reinforcing bars are disposed and the guiderail steel reinforcing bars are laid, the steel wire meshes are mounted below the guiderail steel reinforcing bars, and finally concrete pouring can be performed. The guiderail device has the advantages that the guiderail device is easy in concrete pouring and dense in vibration, construction progress is accelerated, and construction cost is lowered.

The invention discloses a very-high performance concrete prefabricated assembled pipe gallery and a construction method. The pipe gallery is formed by inserting and splicing a plurality of concrete rectangular culvert monomers which are integrally formed front and back; each of the rectangular culvert monomers comprises a side plate, a bottom plate, a top plate and a partition plate; reinforcing rib structures are arranged on the outer side surfaces of the side plate and the top plate; axil angles are arranged at the connections of the side plate and the bottom plate and the side plate and thetop plate; prestress locking devices are arranged at the axil angles; inserting structures which are matched are arranged at the front and back ends of each of rectangular culvert monomers; and the inserting structures are waterproof devices. The construction method comprises the following steps: 1) preparation of the prefabricated rectangular culvert monomers; 2) excavation and support of foundation pits; 3) foundation treatment and cushion ply paving; 4) hoisting of the prefabricated rectangular culvert monomer sections; 5) penetrating and tensioning of the prestress ribs in position; 6) waterproof experiment of the pipe gallery; and 7) soil mass backfilling. The pipe gallery material dosage is reduced greatly, the self weight is reduced greatly, and the very-high performance concrete prefabricated assembled pipe gallery is convenient to transport and hoist, few in step, short in construction period and good in waterproofness and durability.

The invention discloses an outer-wall tongue groove capable of preventing water seepage of a window and a construction method of the outer-wall tongue groove. The front structure of the outer-wall tongue groove is a rectangular frame arranged in a window hole, and the section structure is in the shape of a step with inside higher. The construction method of the outer-wall tongue groove includes procedures of steel banding of a main outer wall, formwork erecting of the main outer wall, concrete casting, auxiliary frame mounting, JS waterproof construction, outer-wall heat insulation construction and window frame mounting. The concrete structure at the window is designed into a manner of the tongue groove, part of construction methods for preventing water seepage of windows is updated, plugging of post-cast strips of a roof is guaranteed, and occurrence probability of water seepage of the window is decreased. Meanwhile, plastering thickness in the indoor window is reduced during construction, and the purpose for preventing water seepage of the window is achieved.

The invention discloses a comprehensive detection method of anchoring status of a prestress anchor cable. By detecting the anchor length, grouting plumpness, prestress and corrosive degree of the prestress anchor cable, the method conducts the contrastive analysis and comprehensive analysis of a single index and consequently analyzes the anchorage quality and safety performance of the prestress anchor cable. The detection method has great significance to control the construction quality of newly built anchoring engineering and grasp the operating status and safety of the existing anchoring engineering.

The invention discloses a cast-in-situ construction method for a reinforced concrete structural system taking phosphogypsum as a wall body material. When construction is performed on a reinforced concrete structural system building, the phosphogypsum is used as the wall body material, the reinforced concrete structural system and phosphogypsum wall bodies are cast in situ. When the reinforced concrete structural system and the phosphogypsum wall bodies are cast in situ, the reinforced concrete structural system is cast in four sections according to floor layers; the height of each section is controlled within 600 to 1,300 millimeters; the cast-in-situ construction is performed in layers and sections from the top to bottom; the reinforced concrete structural system is cast first at each section; and then the phosphogypsum wall body part is cast. The construction method has the advantages of easy construction, fast construction progress, good construction quality and low construction cost. In addition, the integrity and strength of buildings completed by the construction method are improved.

The invention provides an ultra-high-performance concrete prefabricating and splicing integration pipe gallery system which is formed by splicing a plurality of prefabricated sections. Each prefabricated section is prepared through ultra-high-performance concrete. Each prefabricated section is composed of a side plate, a bottom plate, a top plate and a partition plate. Each partition plate is fixed between the corresponding bottom plate and the corresponding top plate. The adjacent prefabricated sections are overlapped through ultra-high-performance concrete patches. The invention further discloses a construction method of the pipe gallery system. According to the integration pipe gallery system, the prefabricated sections of the integration pipe gallery system are made of materials like the ultra-high-performance concrete with high strength, high tenacity and high durability, the structure of the ultra-high-performance concrete patches and the like is combined, rigidity, bearing capacity and waterproof performance of a pipe gallery are improved, the wall thickness of the prefabricated sections is reduced compared with that of a traditional pipe gallery system, the dead weight of the pipe gallery is reduced remarkably, and transporting and hoisting are convenient. The material use amount of the pipe gallery is low to be 50% of that of the traditional pipe gallery system, the comprehensive production cost is reduced by 10-50% correspondingly, rigidity is large, the system is suitable for regions with poor foundation geologic conditions, the construction period of the pipe gallery system is short, and the influence on the construction environment is small.

The invention discloses a C-C type interlocking steel pipe pile cofferdam and a construction method. The cofferdam is encircled by a plurality of C-C type interlocking steel pipe piles which are closely connected in sequence, wherein each C-C type interlocking steel pipe pile comprises a vertical steel pipe as well as a male lock catch and a female lock catch which are distributed at the outer side of the vertical steel pipe, and each two adjacent vertical steel pipes are connected through an interlocking structure composed of the corresponding male lock catch and female lock catch; and each interlocking structure is internally densely filled with an interlocking filling structure, and each interlocking filling structure comprises a cloth bag, heating resistance wires distributed in the cloth bag, and a mortar filling structure formed by sulphur mortar filled in the cloth bag. The construction method comprises the following steps: 1. surveying and setting out; 2. steel pipe pile inserting piling and closure construction; 3. interlocking structure filling; 4. cofferdam construction completion; and 5. cofferdam removal. The cofferdam disclosed by the invention is reasonable in design, simple and convenient to disassemble and assemble, safe and reliable, good in water-stopping effect, and capable of effectively achieving the engineering purposes of interlocking connection, water-stopping and rapid removal of the steel pipe pile cofferdam.

The invention discloses a construction method of large-span post-tensioned prestressed longitudinal and transverse frame beams, which comprises the steps of erecting a supporting body, producing a template, arranging a base template and a unilateral template, rolling longitudinal main reinforcements, installing a corrugated tube, rolling hoop reinforcements, embedding utility pipelines, mounting prestressing steel wires, mounting an anchor backing plate, closing a lateral templates, filling concrete grouts, pretensioning and grouting pore canals; in the pretensioning, the prestressing tendons of beams are stretched according to the following steps: (1) firstly, the frame beams at the top layer are stretched and then frame beams at the following layers are stretched; (2) the short spans of the longitudinal and transverse frame beams at the same layer are stretched first, and then the long spans thereof are stretched; (3) the upper prestressing tendon of a building unit is stretched first, and then the lower prestressing tendon thereof are stretched; and the left line and the right line of prestressing tendons are stretched symmetrically and separately. The construction method adopts a stretching order from the upper layer to the lower layer and can construct the prestressed frame beams in accordance with an ordinary reinforced concrete structure layer by layer, thereby being capable of reducing the influence of concrete curing on the construction period and accelerating work progress.

The invention relates to a full-prefabricated floor special for a fabricated steel structure. The full-prefabricated floor is arranged on a steel beam and comprises a steel bar truss, surface bars, bottom bars, an embedded part and a prefabricated concrete layer. The steel bar truss comprises upper string steel bars, lower string steel bars and erecting bars. The upper string steel bars and the lower string steel bars are arranged in parallel and welded to the upper ends and the lower ends of the erecting bars correspondingly. The erecting bars are arranged at equal intervals, and the surfacebars and the upper string steel bars of the steel bar truss are bound together. The bottom bars and the lower string steel bars of the steel bar truss are bound together, and the steel bar truss, thesurface bars, the bottom bars and the embedded part are pre-embedded in the prefabricated concrete layer. The embedded part is connected with the steel beam. According to the full-prefabricated floor,through effective connection with a steel structure main body, the structural integrality and shock resistance are improved, meanwhile, only a joint laminated layer needs to be cast in situ, and thefabricated efficiency is greatly improved, so that the full-prefabricated floor can play a significant role in the fabricated steel structure field.

The invention discloses a device and a method of measuring the working performance of pervious concrete. The device comprises an upper part and a lower part in detachable assembly, wherein the upper part comprises a test detection barrel; the test detection barrel is detachably mounted at the top of a fixing frame; a transparent disc is arranged at the top of the test detection barrel; a counter weight device is mounted at the top of the transparent disc; the lower part comprises a base; a vibrating table is mounted on the base; a vibrating motor is mounted at the bottom of the vibrating table; a reflector is arranged below the test detection barrel and is fixed on the base. The method can be used for quantitatively evaluating the working performance of pervious concrete so as to ensure good working performance of the pervious concrete in different working conditions and improve the construction quality.

The invention belongs to the field of road engineering material detection equipment, and relates to an aggregate morphological characteristic detection system and method based on 3D point cloud data.The system comprises an acquisition mechanism, a processing mechanism and a display unit. The display unit is used for displaying and inputting the acquisition parameters of a set aggregate, the acquisition mechanism is used for placing the aggregate, acquiring the 3D point cloud coordinate information of the aggregate and transmitting the acquired 3D point cloud coordinate information to the processing mechanism, and the processing mechanism is used for receiving the 3D point cloud coordinate information transmitted by the acquisition mechanism and the acquisition parameters inputted by the display unit, extracting and calculating the morphological characteristic parameters of the aggregate from the 3D point cloud coordinate information, carrying out index evaluation on the morphologicalcharacteristic parameters according to the acquisition parameters, and displaying the morphological characteristic parameters through the display unit. The system and the method of the present invention can carry out 3D detection on each aggregate, are not influenced by the light, are stable in test result and high in precision, can carry out the batch detection, can evaluate and optimize the aggregate quality rapidly, and can control the construction quality effectively.

The invention relates to a composite floor slab special for an assembled steel structure. The composite floor slab is arranged on a steel beam and comprises a rebar truss, bottom rebars, embedded members and a prefabricated layer, the rebar truss comprises upper-chord rebars, lower-chord rebars and web member rebars, the upper-chord rebars and the lower-chord rebars are arranged parallelly to eachother and are in isosceles triangle distribution, and the web member rebars are welded between the upper-chord rebars and the lower-chord rebars; the bottom rebars are bound together with the lower-chord rebars of the rebar truss and are perpendicular to the same, the rebar truss, the bottom rebars and the embedded members are embedded in the prefabricated layer, and the embedded members are connected with the steel beam. By the composite floor slab, the problem in connection between conventional composite floor slabs and steel structures is solved; through effective connection with a steel structure body, integrity and aseismicity of the structure are improved, so that the composite floor slab can play a great role in the field of the assembled steel structure.

The invention provides an earth-excavating device and earth-excavating method for earth pressure balance shield or pipe-jacking construction. The earth-excavating device comprises a mud pressing pumpconnected to a shield or a screw conveyor earth discharge mouth of a jacking pipe; a booster pump located in the shield or a last-section frame of the jacking pipe and connected with the mud pressingpump through a first pumping pipeline; a wellhead pump located at a tunnel wellhead and connected with the booster pump through a telescopic pipeline; a ground earth collecting pit connected with thewellhead pump through a second pumping pipeline. The earth-excavating device is specially used for tunnel construction by means of a shield or jacking pipe method. By means of the mud pressing pump arranged at the screw conveyor earth discharge mouth, the booster pump arranged in the shield or the last-section frame of the jacking pipe, and the wellhead pump arranged in the tunnel wellhead, the screw conveyor excavated earth generated from the shield or the jacking pipe during the excavation process is continuously and rapidly pumped until the earth is pumped into the ground earth collecting pit, the booster pump is connected with the screw conveyor earth discharge mouth in a sealed mode, and the screw conveyor excavated earth is extruded into pumps in a sealed mode and then into pumping lines, so that the pumping efficiency is higher.

The invention discloses a construction method for a high-ductility masonry wall with a reinforced mortar joint mortar layer, and belongs to a construction method of a high-ductility masonry wall. Theconstruction method comprises the steps that (1) building blocks used for building a wall body are wetted in advance; (2) high-performance mortar-joint mortar with the thickness being 3-5 mm is smeared on first-layer building blocks along the cross section of the wall body according to the size of a cross section of the wall body; (3) a piece of geogrid mesh or a steel wire mesh is laid on the high-performance mortar joint mortar, high-performance mortar-joint mortar with the thickness being 3-5 mm is smeared on the geogrid mesh or the steel wire mesh, and second-layer building blocks are built on the high-performance mortar-joint mortar layer; and (4) the step (2) and the step (3) are repeated, wall body building is completed according to the designed height of the masonry wall. The construction method for the high-ductility masonry wall with the reinforced mortar joint mortar layer has the advantages that (1) the stress property of the whole masonry wall is improved; (2) transfer andexpansion of a crack in the mortar-joint mortar layer are effectively controlled, and ductility and integrity of the masonry wall are improved; and (3) the transfer path of cutting off the crack is effectively obstructed, the anti-shear property of the masonry wall is improved, and the aseismic performance of the newly-built masonry wall is improved accordingly.