53results about How to "Facilitate construction quality control" patented technology

The invention discloses a sole plate post-poured strip form bracing system, applicable to sole plate post-poured strip form bracing of basement in constructional engineering. The form bracing system is mainly composed of components of a steel screen mould, a cable-stayed bolt and structural steel back plank, a precast slurry baffle concrete strick and a slurry baffle wood block. The invention utilizes a sole plate reinforcing mattress as a main bracing body, side pressure of concrete at the two sides of the post-poured strip can be effectively braced, the cavity of the formed post-poured strip is clean, tidy and clear and has no concrete pouring oozing or laitance pollution, most materials in the post-poured strip form bracing system are available and can be dismantled and recycled, and design function of post-poured strip can be effectively realized.

The invention discloses an embedding accuracy control construction method for an embedded part of an overlong equipment foundation platform, including the following steps: firstly, processing the embedded part and the installation screw of the embedded part; secondly, molding construction of the lower middle reinforced concrete structure of the foundation platform needing construction: a plurality of vertical reinforcing steel bars extend out from the top of the lower middle reinforced concrete structure under construction of molding and are arranged vertically; thirdly, installing the installation screw of the embedded part; fourthly, installing a nut at the bottom of the threaded section of the installation screw of the embedded part; fifthly, installing and positioning the embedded part; sixthly, installing a nut on top of the threaded section of the installation screw of the embedded par; seventhly, molding construction of the upper reinforced concrete structure of the foundation platform needing construction; and eighthly, subsequent construction treatment. The method has in design, simple construction steps, easy control of construction quality, high construction accuracy and good in use effect, and can solve the problems of the existing embedding construction method of embedding parts that the embedding accuracy is inconvenient to control, the embedding accuracy is low, the construction quality is poor, the investment cost is high, the construction period is long, and the like.

The invention discloses a slope protection pile pouring and cable bolting construction method for a deep foundation pit. The method comprises the following steps of: 1, making preparations before construction; 2, pouring a slope protection pile, namely measuring, paying off, molding and constructing the poured slope protection pile, punching holes on the poured slope protection pile, binding and hoisting a steel reinforcement cage for molding the slope protection pile, pouring concrete into the poured slope protection pile and constructing a crown beam at the top end of the pile; and 3, excavating a foundation in a layered form and constructing anchor ropes on different rows, namely excavating a first-layer foundation, arranging a first row of anchor ropes, arranging a steel waist rail, arranging anchor heads of the anchor ropes, tensioning the anchor ropes and finishing excavating processes of different layers of foundations and arranging different rows of anchor ropes. The method has a reasonable design, simple construction steps, low investment cost, large support depth and good using effect, and solves the problems of complicated construction steps, high construction cost, inconvenience in control, easy damage to surrounding pipelines, roads, buildings and the like, large construction space and the like existing in the conventional double-row pile supporting method can be solved.

The invention discloses a shield tail brush replacement annular freezing reinforcing water seal structure and a construction method thereof; the reinforcing water seal structure uses annular freezing pipe construction equipment to bury 1-2 annular freezing pipes in the soil body position needs to replace the shield tail brush, and uses an artificial freezing mode to enable the soil body around the annular freezing pipes to form a temporary annular frozen soil curtain reinforcing water seal structure; the specific technical process is listed as below: construction preparation-annular freezing pipe boring construction-freezing system and temperature measurement system installation-active freezing(temperature monitoring)-dismounting duct piece and replacing shield tail brush (freezing maintenance)-forced unfreezing-annular freezing pipe extraction (sealing hole)-back filled grouting-shield continue propulsion. The construction method is simple, easy to operate and realize, strong in construction practicality, convenient in construction quality control, good in reinforcing effect and water seal effect, outstanding in safety and reliability, and has very big application values.

The invention discloses a tunnel collapse handling method for a convergent collapse cavity, and relates to the field of tunnel engineering. By the adoption of the tunnel collapse handling method for the convergent collapse cavity, the problem that an existing handling method lacks operability, can cause potential safety hazards, and is not economical is solved. According to the technical scheme, the tunnel collapse handling method for the convergent collapse cavity comprises the steps that first, after the tunnel collapse cavity is stabilized, a construction platform is formed by means of collapse residues; second, a landslide-affected section is divided into an excavated landslide-affected section and a non-excavated landslide-affected section which are separately reinforced; third, concrete is sprayed to support the collapse cavity; fourth, a temporary support and a formwork are constructed on a landslide section, a manhole is formed in the portion, in the middle of the landslide section, of a tunnel vault, the collapse cavity is backfilled with concrete, landslide anchoring rods are constructed, reinforcement of the temporary support and the landslide-affected section is removed, and the construction platform is removed through excavation; and finally, a tunnel drain pipe and a waterproof plate are constructed according to original design, and secondary lining concrete is constructed. The tunnel collapse handling method has high practical value in handling convergent tunnel collapse cavities.

The invention discloses a joint reinforcement structure for a shield tunnel end and a construction method. The joint reinforcement structure is a rectangular box structure as a whole, and the rectangular box structure is formed by reinforcement structures surrounded on four sides. The reinforcement structure near a foundation pit is a frozen soil wall, and the reinforcement structures on the remaining three sides are cement soil continuous walls. The method includes a first step of construction of cement soil continuous walls by using a TRD method to construct continuous walls of cement soil with a three-cycle method; a second step of construction of vertical frozen soil wall by firstly, drilling of freezing holes, installing a freezing station at the same time; after confirming that the freezing meets the door chiseling condition, starting to break a hole wall, forcibly unfreezing before a shield main machine enters into the hole, pulling out a vertical freezing tube after the shieldmain machine completes entering and exiting the hole, and grouting. The joint reinforcement structure has the beneficial effects that strong construction practicability, convenient construction quality control and outstanding reinforcement effect. Compared with a traditional cement-soil mixing piles reinforcing method, the method saves cost and greater promotion and application value is ensured.

The invention relates to a steel structure tension beam roof construction method based on a BIM technology, and belongs to the technical field of building construction. The BIM technology is applied in the construction process of a spoke-type string beam structure roof, a virtual spoke-type chord beam structure roof is established in advance through BIM, each lower chord beam is a pre-stressed cable, the cables are divided into three groups and two stages for circulation tension, the BIM technology is applied to perform simulation analysis of the whole process of the virtual cable tensioning construction, and the cable force and key point displacement of each lower chord beam in the tensioning process are dynamically tracked. According to the construction method, the BIM technology is applied to carry out three-dimensional dynamic simulation of the BIM in advance, and all the pre-stressed chord beams are subjected to three-batch two-stage cyclic tensioning; and on the premise of ensuring that the influence on the adjacent group of pre-stressed chord beams is minimal when the indifferent group of pre-stressed chord beams are inhaul cable tensioning construction, the construction period is reduced to the maximum extent. The required number of jacks is 1/3 that of the pre-stressed chord beams, and 2/3 of the original number of the jacks is decreased. The economic benefit is good,the construction quality control is good, mature operability is achieved, and the construction process safety is high.

The invention discloses a shield tunnel end head frozen earth wall and even wall combined strengthening structure and a construction method. The combined strengthening structure comprises a frozen earth wall and an even wall, wherein the frozen earth wall is arranged at the position next to an enclosure structure, and the even wall is arranged at the rear portion of the frozen earth wall. The construction method includes the steps that firstly, construction of the even wall is conducted, wherein the construction technology includes surveying and setting out, guide wall manufacturing, slurry mixing, even wall grooving and bottom clearing replacing, glass fiber reinforcement cage or bamboo reinforcement cage machining and lifting, concrete pouring, connector construction, connector pipe ejecting pulling and all-section construction complementation; and secondly, frozen earth wall construction is conducted, wherein according to the construction of the frozen earth wall, before shield tunneling, a manual refrigerating method is used for freezing a water-containing stratum in a working well end head area into a sealed and non-water-permeable curtain, and the frozen earth wall is formed.The shield tunnel end head frozen earth wall and even wall combined strengthening structure and the construction method have the beneficial effects that appropriate strengthening can be conducted onend head stratums rich in water sand layers in areas along seas, rivers, lakes and the like.

The invention discloses a foundation pit bottom horizontal freezing reinforcing structure and a construction method. The reinforcing structure comprises a foundation pit, an enclosure structure, a horizontal freezing pipe and a freezing curtain. The horizontal freezing pipe penetrates through the enclosure structure in a horizontal directional drilling manner and is horizontally arranged at the bottom of the foundation pit; a plurality of horizontal freezing pipes are uniformly arranged in a soil layer at the bottom of the foundation pit along the horizontal direction, the horizontal freezingpipes freeze the soil layer at the bottom of the foundation pit to form the freezing curtain, and the foundation pit is excavated after the freezing curtain is formed and takes the top of the freezingcurtain as the bottom of the foundation pit. The construction method has the outstanding advantages of being high in construction practicability, convenient to control construction quality, good in reinforcing effect, particularly good in water stop effect, safe, reliable and the like, and the safety of deep soft soil engineering piles in the foundation pit in the excavation process can be guaranteed to the maximum extent.

The invention relates to an evaluation method of the mortar consistency of a cement stabilized macadam permeable base, which belongs to the field of urban construction, and aims to solve the problems that the existing evaluation method of mortar consistency has strong subjectivity and difficult quantification. The method comprises the following steps that: step 1, a leakage test is carried out for the mixed material of the cement stabilized macadam permeable base to be measured; step2, the mixed material of the cement stabilized macadam permeable base after the leakage forms at least two test pieces; step 3, one or more forming test pieces are uniformly divided into an upper part and a lower part, the voidage of the test pieces at the upper part and the lower part is measured, and whether the voidage of the test pieces at the upper part and the lower part is less than 5 percent is calculated; and step 4, a 7d unconfined compressive strength test is carried out for the remaining forming test pieces, and whether the compressive strength of the remaining forming test pieces is between 4.8MPa and 5MPa is tested; and when the two conditions of the step 3 and the step 4 are simultaneously met, the consistency of cement mortar is judged to meet the standard.

The invention relates to an unloading type combined retaining structure and a construction method thereof. The unloading type combined retaining structure is divided into two types, wherein one type is a combined retaining structure jointly formed by supporting piles, unloading plate supporting piles, supporting pile top connecting beams, unloading plates, longitudinal connecting beams, transversesupporting beams, plate top backfill soil and other members; and the second structure is a combined retaining structure jointly formed by the supporting piles, the supporting pile top connecting beams, the unloading plates, the longitudinal connecting beams, ribbed beams or ribbed plates, the longitudinal supporting beams, reinforcing waist beams, the plate top backfill soil and other members. According to the unloading type combined retaining structure, the unloading effect of the unloading plates is fully utilized, the soil pressure acting on the supporting structure is effectively reduced,and the foundation pit supporting structure can be formed without occupying the space outside a red line, without implementing an anchor rod on the outer side of a foundation pit and without arranging a support inside the foundation pit. The unloading type combined retaining structure is clear and definite in stress, reliable in quality and high in construction speed, can greatly wide the application range of the supporting and retaining type supporting and retaining structure, and can replace an inner supporting and retaining structure under partial conditions.

The invention discloses a culvert structure adopting high density polyethylene (HDPE) winding reinforcement pipes and foam concrete. The culvert structure comprises a culvert pipe foundation, culvert pipes and filling bodies located on the two sides and the upper portions of the culvert pipes. The filling bodies are foam concrete filling bodies. The culvert pipes comprise the multiple HDPE winding reinforcement pipes which are connected in an end-to-end mode in sequence. The inner side of the connecting position of every two adjacent HDPE winding reinforcement pipes is provided with an annular steel band in a winding mode. Seepage-proofing sealing structures are disposed between the annular steel bands and the HDPE winding reinforcement pipes. Sealing reinforcement devices are disposed on the annular steel bands. The culvert structure is small in self weight, low in requirement for foundation bearing capacity, capable of effectively solving the problems of differential settlement and cambering of the culvert pipes and suitable for the environment conditions of corrosion and abrasion. The invention discloses a construction method of the culvert structure. The construction method includes the steps of (1) culvert pipe foundation construction, (2) culvert pipe mounting, (3) construction of the filling bodies and (4) construction of a road surface. By means of the construction method, the foam concrete is used as a filling material, and the link of compacting the fillers on the arch apex and culvert sides is omitted.

The invention provides a spherical surface and cylindrical surface friction type support and relates to a friction type support. The spherical surface and cylindrical surface friction type support solves the problems that an existing friction swing support is prone to generating resonance, a variable frequency swing support is in point and surface contact for a long time, and consequently the vibration isolation and reduction effect is poor. A sliding groove is formed in the upper end face of a collecting steel plate, a sliding block is located in the sliding groove, the upper half part of the sliding block is in a semispherical shape, a semispherical groove matched with the sliding block is machined in the center of the lower end of the cover plate, the cover plate is supported by the upper end face of the sliding groove through the sliding block, the contour of the left half part of the sliding groove is rectangular, the contour of the right half part of the sliding groove is semicircular, a cylindrical groove is machined in the left half part of the sliding groove, a spherical groove is machined in the right half part of the sliding groove, the radius of the arc surface of the cylindrical groove and the radius of the arc surface of the spherical groove are identical, and the cylindrical groove and the spherical groove are in smooth transition connection to form a complete smooth surface. The spherical surface and cylindrical surface friction type support is used for vibration isolation of a large-span space structure.

The invention discloses a foundation pit bottom freezing reinforcing structure and a construction method thereof. The foundation pit bottom freezing reinforcing structure is formed by arranging a freezing reinforcing structure at a foundation pit bottom. The freezing reinforcing structure is of a full hall type or a grating type or a skirt edge type or a drawing strip type, and the freezing reinforcing structure is formed by freezing through a vertical freezing pipe or a horizontal freezing pipe. The construction method comprises the steps that 1, construction preparation is conducted; 2, a foundation pit support structure is constructed; 3, drilling construction and freezing system installation are conducted; 4, positive freezing is conducted to form the foundation pit bottom freezing reinforcing structure; 5, the freezing pipe is pulled out; and 6, a foundation pit is excavated to the bottom, and a bottom plate is poured. The invention has the beneficial effects that the foundation pit bottom freezing reinforcing structure has the advantages of being high in construction practicability, convenient for controlling construction quality, good in reinforcing effect, especially waterstop effect, safe, reliable and the like, and has large application and popularization value.

The invention provides a technological process digitization method for intelligent construction. The method comprises the following steps of S1, forming a construction process design model which comprises a three-dimensional geometric model, attribute information and annotation information and is continuously derived along with time according to requirements of a design stage on a construction process; s2, forming a structured construction process information model according to the process preparation information, the constraint elements, the resource elements, the process activity information and the process product information of the design stage and the construction stage; s3, combining the construction process design model and the construction process information model to form a construction process model; s4, performing construction process-oriented process information expression based on the construction process model; and S5, forming an interactive construction operation instruction book for guiding the construction process of the building engineering. According to the method, the construction technological process in the construction process is standardized, a three-dimensional visualization technical form is adopted, the technological information in the construction process is visually displayed, and effective control over the construction quality and the technological quality of building engineering is achieved.

The invention relates to the technical field of artificial stratum freezing method construction of underground engineering, in particular to a local difference freezing pipe capable of controlling a freezing section and applied to freezing construction. The freezing pipe comprises an upper control freezing section, a lower control freezing section, a partition device, a liquid inlet pipe, a liquid return pipe and a control valve; and different valves are controlled, and the flowing path of low-temperature refrigerant in the freezing pipe is controlled. According to the local difference freezing pipe, selective freezing can be achieved, the defect that a traditional freezing pipe can only conduct whole-section freezing is overcome, controlled freezing of stratums with different layer depths can be achieved, the freezing efficiency of the freezing pipe is improved, a freezing area and the freezing section can be controlled, various construction requirements and engineering actual working condition requirements are met, and the working efficiency is improved. The local difference freezing pipe has the outstanding characteristics of being easy to operate, high in construction practicability, excellent in economical efficiency and the like, and has high application and popularization value.

The invention discloses an earthquake-insulation construction process based on an LRBLNR type support seat. The earthquake-insulation construction process comprises the steps that (1), deepening design is performed according to the construction requirements; (2), lower buried plate assembling, hoisting and positioning are performed; (3), upper buried plate and support seat assembling, hoisting andinstalling are performed; (4), earthquake-insulation support seat circumferential sealing blocking is performed; and (5), bracket installing is performed. By means of the earthquake-insulation construction process based on the LRBLNR type support seat, the primary installation success rate of the earthquake-insulation support seat is improved, errors in the installation procedure are reduced, theconstruction schedule is greatly accelerated, the concrete compactness in casting is greatly improved, and construction quality control is conveniently performed, convenience is provided for follow-up construction, influence of high temperature or molten slag on the support seat in the upper-portion steel structure welding process can be prevented, deface caused to the support seat in the upper-portion structural concrete pouring process is avoided, and the situation that concrete intrudes into a connecting plate to influence later-period replacement of the support seat further can be prevented.