34results about How to "Avoid settlement deformation" patented technology

The invention relates to a heat insulation and water prevention integration building roof and a construction method thereof, relating to the technical field of building. So-called integration firstly means heat insulation and water prevention function integration and secondarily means that a seamless integral roof is formed through a cast-in-site construction method so that the building roof has better heat insulation and water prevention effect. The heat insulation and water prevention integration building roof comprises a heat insulation tile layer and a water prevention layer sandwiched infoam concrete. The heat insulation and water prevention integration building roof is characterized in that the heat insulation tile layer is positioned on the lowest end of the building roof and formed by overlapping heat insulation tiles, and overlapping positions are provided with water-stop groove faces; and the water prevention layer is formed by casting polystyrene foam concrete on the heat insulation tile layer in site and then strickling, then spraying high molecular polymer emulsion and then coating waterproof paint in a strickling way, then paving waterproof roll materials and finally casting the foam concrete in site. The invention is not only suitable for severe cold regions in the national north, but also suitable for extremely hot regions in the national south and also has the advantages of low project cost, easy construction process operation, wide material source and suitability for wide popularization.

The invention provides an expansive soil foundation structure and construction method containing ballastless track subgrade, comprising porous pipe piles, expansive soil foundation, geosynthetic material reinforced cushion and ballastless track subgrade, the porous pipe pile and expansive soil The foundation is set at the bottom, and above it, a geosynthetic material reinforced cushion and a ballastless track subgrade are arranged in sequence from bottom to top; a plurality of porous pipe piles are vertically arranged in the expansive soil foundation, and the porous pipe piles include hollow porous The pile body and the elastomer material filled therein, the hollow porous pile body is a hollow reinforced concrete structure, and the porous pipe pile also includes a radial through hole passing through the inner and outer walls of the hollow porous pile body in the radial direction. The invention effectively reduces the expansion and contraction deformation of the expansive soil foundation when it loses water, so that the expansion and contraction deformation of the ballastless track subgrade is controlled within a reasonable range, which meets the high-speed and safe operation requirements of trains on the ballastless track subgrade, and saves expansive soil The cost of ground reinforcement treatment.

The invention discloses a rainwater collection and permeation system preventing settlement deformation of the ground. The rainwater collection and permeation system comprises a primary rainwater flow abandoning pond, a filtering and purifying pond, a rainwater collection tank and a dry type sludge removing well. Multiple permeation filtering pipelines are vertically connected to the lower portion of the rainwater collection pond at intervals. The rainwater collection pond is formed by building polypropylene plastic modules and is wrapped in a waterproof geomembrane. The permeation filtering pipelines can guide rainwater to cross a foundation bearing layer to reach a lower sand contained layer, it is avoided that damage is generated due to the fact that rainwater permeates into the soil body of the foundation bearing layer for a long time and even soaks the soil body, and therefore a foundation is effectively prevented from settlement deformation. According to the rainwater collection and permeation system preventing the settlement deformation of the ground, the permeation filtering pipelines and the polypropylene plastic modules are combined to form an in-situ permeation system, the demands of ground settlement and utilization of rain seepage are met, the contradiction that the settlement of the ground and the in-situ permeation cannot be unified is overcome, and the rainwater collection and permeation system is widely applied to and built under the ground of rigid pavement park sites, squares, parking lots and the like.

The invention relates to an underground construction technology, and specifically relates to an open-excavated tunnel water stopping structure for protecting a groundwater environment and a construction method thereof. The open-excavated tunnel water stopping structure comprises vertical frozen earth water stopping layers arranged at two sides of an open-excavated foundation pit of a tunnel, and a horizontal frozen earth water stopping layer arranged at the bottom part of the open-excavated foundation pit of the tunnel, wherein the vertical frozen earth water stopping layers intersect with the horizontal frozen earth water stopping layer; the bottom parts of the vertical frozen earth water stopping layers are lower than the bottom part of the horizontal frozen earth water stopping layer. According to the open-excavated tunnel water stopping structure, the vertical frozen earth water stopping layers and the horizontal frozen water stopping layer form a U-trough shaped frozen earth water stopping layer to protect the groundwater environment, and thus the groundwater can be prevented from being polluted during the tunnel construction process; a frozen earth water stopping structure is adopted, so that wide-range draining construction can be avoided, and precious groundwater resources can be saved; meanwhile, surrounding buildings and structures can be prevented from being subjected to sedimentation and deformation caused by the draining construction.

The invention relates to a high-strength high thermal-shock-resistance low-aluminium mullite brick, which comprises the following components in percentage by weight: 15-50% of raw material sintered mullite, 5-15% of electric melted mullite, 10-40% of superfine flint clay, 10-30% of sillimanite, 10-30% of andalusite, 2-10% of activated alumina, 2-15% of zirconite, 2-12% of silica and 3-10% of bond clay. The high-strength high thermal-shock-resistance low-aluminium mullite brick provided by the invention made from the above raw material components has the advantages of high refractoriness under load (larger than or equal to 1500 DEG C) and heated volume stability, high thermal-shock resistance (larger than or equal to 50 times under water cooling at 1100 DEG C), low creep rate (smaller than or equal to 0.15 in 20-50 hours), good compressive strength (larger than or equal to 70Mpa), good volume stability and low impurity content at high temperature and the like; and at the same time, the CO corrosion resistance of the product provided by the invention is unaffected, so that the product provided by the invention can meet the use requirements of the medium and large blast furnace hot blast stove and other high-temperature kilns.

The invention relates to a reinforcement construction method for building foundation treatment, in particular to a method for strengthening the foundation of a building by utilizing quicklime brick ballast compaction piles, using quicklime, brick ballast, soil, and cement as raw materials and pouring into the foundation In the pile hole, the pile hole is formed by impact, and the pile end is compacted with brick ballast. The adopted process is: construction preparation→construction setting out→construction precipitation→impact hole forming→layer pouring→tamping and capping. The percussion drill impacts the hole, and the soil between the piles is compacted during the hole formation process. After mixing quicklime, brick slag, soil, and cement raw materials, they are driven into the pile hole of the foundation soil. The quicklime absorbs water and expands to cause secondary compaction of the soil between the piles. effect, the pile end is rammed with brick ballast, and the brick ballast acts as a hard aggregate, making the pile upright and upright, which can effectively increase the strength of the foundation soil, improve the bearing capacity of the foundation soil, improve the uniformity of the foundation soil, and prevent the foundation from being damaged due to Settlement deformation occurs due to uneven force, low cost, no environmental pollution, and can shorten the construction period.

The disclosure relates to the technical field of tunnel construction, and discloses a tunnel using prefabricated inverted arch modules. The prefabricated invert module of the tunnel is provided with a pre-embedded sleeve, which extends to the outside of the lateral end of the prefabricated invert module, and the protruding part of the pre-embedded sleeve is provided with a first strip-shaped installation hole. The installation holes are arranged along the horizontal extension, the inner end of the connecting steel frame is provided with the first bolt installation hole, the first bolt installation hole and the first bar-shaped installation hole are connected with fastening bolts, and the lower end of the primary support is provided with a supporting steel plate , the supporting steel plate is arranged along the longitudinal extension, the outer end of the connecting steel frame is provided with a connecting steel plate connected with the supporting steel plate, the supporting steel plate is provided with a second strip-shaped installation hole, the second strip-shaped installation hole is arranged along the vertical extension, and the connecting steel plate is opened There is a second bolt installation hole, and the second bolt installation hole and the second bar-shaped installation hole are connected with fastening bolts; the stability of the tunnel structure and the construction progress are improved.

The present disclosure relates to the technical field of tunnel construction, and discloses a tunnel construction method using a prefabricated inverted arch module. The tunnel construction method makes the connecting steel frame more tightly supported between the initial support and the prefabricated inverted arch module, and finally the fastening bolts between the connecting steel frame and the embedded sleeve are tightened again and the two Welding, connecting the fastening bolts between the steel plate and the supporting steel plate are re-tightened and the two are welded, so as to ensure the stable connection between the prefabricated inverted arch module and the initial support, and avoid the initial installation of the connecting steel frame caused by insecure installation. The support is deformed inwardly due to the surrounding rock pressure, and the application replaces the inverted arch in the traditional tunnel construction with a prefabricated inverted arch module, so that the support of the tunnel perimeter can be ensured to form a closed loop quickly, so as to avoid the deformation and settlement of the excavated section of the tunnel. , to improve the stability of the tunnel structure and construction progress.

This invention design carries on the railroad in many years frozen earth area, the road and in the project construction construction one kind of unidirectional heat conduction installment, it is by the thermal insulation material, the working substance carrier, the metal tube composes, the metal tube through the thermal insulation material and the working substance carrier nesting, encircles annular channel. Installs underground this installment level in in the certain position soil body; Using its unidirectional heat conduction performance, summer the external environment temperature is higher, the quantity of heat unceasingly spreads to in the soil body, this equipment may effectively prevent this part of thermal spreading to; Is lower in the winter external environment temperature, soil body unceasingly exothermic, flows through carrier the heavy working substance with the convection, enables lower part the soil body the quantity of heat to release. From this may effectively avoid many years frozen earth season activity the freezing and thawing to the roadbed and the project construction stable influence, causes on many years frozen earth the project construction stable establishment in a higher level.

The invention relates to the technical field of civil engineering tunnel shield construction equipment, and discloses a novel shield tunnel concrete pipe piece micro reinforcing pile. The novel shieldtunnel concrete pipe piece micro reinforcing pile comprises a reinforcing pile main body; a pile body grouting port is formed in the external of the reinforcing pile main body; a cover plate is fixedly connected to the left side of the reinforcing pile main body; a cover body grouting port is formed in the cover plate; a pipe wall connecting bolt is fixedly connected to the left side of the coverplate; and a core rod is fixedly connected into the reinforcing pile main body. In the novel shield tunnel concrete pipe piece micro reinforcing pile, through use of the method and the device, the mechanical performance of soil around tunnels can be effectively improved; and a whole is formed through grouting, so that the load bearing capacity is improved, the lining and soil integrity is greatlyimproved, the stress range of the reinforcing pile main body is widened, the excessive precipitation deformation is effectively prevented, potential safety hazards in shield tunneling are greatly eliminated, and the shield method is used more safely.

The invention discloses a construction method for the lower section of an underground tunnel. In the construction method, a hydraulic jack is arranged below the underground tunnel in the construction continuous stage and the underground tunnel structure is jacked according to the settlement of the underground tunnel structure so as to prevent the settlement deformation of the underground tunnel structure, ensure that the excavating construction of the lower section of the underground tunnel is completed under the condition of continuous running of underground transport and ensure the safety of the underground transport and the construction of the lower section.

The invention belongs to the technical field of infrastructure engineering materials, in particular to a slurry used for thixotropic mud replacement in pipe jacking construction, which solves the difficulty of settlement control in the process of pipe jacking construction in the prior art and the existing thixotropic mud filling support Bad problem, the slurry used for thixotropic mud replacement in pipe jacking construction includes the following raw materials: Portland cement 150-250 parts, quartz sand 100-200 parts, modified calcium carbonate 50-100 parts, nano hydrogen 40-80 parts of calcium oxide, 8-10 parts of lithium stearate, 1-3 parts of sodium dimethyldithiocarbamate, 1-3 parts of sodium metasilicate pentahydrate, 2-5 parts of retarder, 300 parts of water ‑500 copies. The slurry prepared by the invention has high strength, good dispersibility, stability and corrosion resistance, which can well regulate the pressure between the pipe joint and the surrounding soil, and fill the gap between the pipe joint structure and the surrounding soil, thereby creating a To effectively fill the supporting role, to avoid formation disturbance and settlement deformation.