32results about How to "Control settlement deformation" patented technology

The invention discloses a method for solidifying sludge with a high water content. At first, dredged sludge is collected and stored, basic physical indexes of sludge are measured, the sludge and alkali residues are mixed to form matrix soil; a curing material is added and then is evenly mixed and stirred; then the matrix soil containing the curing agent is transported to a fixed location; the matrix soil is covered and cured for a prescribed period; and finally the mechanical indexes of cured sludge are measured. The optimal ratio of alkali residues to dry sludge is 30-50:100. The curing material comprises following components in percentage by the weight of dry mixed soil: 10 to 25% of mineral powder, 0.1 to 0.5% of super absorbent resin, and 2 to 6% of sodium silicate. The cooperative effect between alkali residues and sludge with a high water content is utilized to form matrix soil; super absorbent resin is used to reduce the water content of sludge, the utilization rate of alkali residues is increased, the solidification cost is reduced, and the solidified soil has the advantages of high early strength and low compressibility and meets the engineering requirements of filling soil.

The invention provides a combined lattice steel frame spray anchoring supporting method and a combined lattice steel frame spray anchoring supporting structure. The structure comprises a reinforced concrete top beam, an L-shaped connecting rib, lattice steel frames, a connecting rib, a horizontal inner supporter, a backing type steel hidden supporter, an advanced small conduit, a steel bar net sheet and sprayed concrete, wherein the advanced small conduit is provided with grouting holes, the lattice steel frames are formed by a plurality of sections of transverse H section steel and a plurality of sections of longitudinal section steel surrounding purlins, the horizontal inner supporter is erected between the lattice steel frames arranged at two sides of a foundation pit, and the backing type steel hidden supporter is arranged at the foundation bottom of the foundation pit. The method and the structure have the beneficial effects that the lattice steel frames are processed section by section on the ground and are combined and mounted in the pit, the operation construction is convenient, and the quality control is convenient; the support structure is excavated and supported one house rack by one house rack from top to bottom, the construction does not need large-scale mechanical equipment and can be completed through manual work, and the construction cost is low; the occupied operation are is very small, and the method and the structure are mainly suitable for the small-foundation-pit-excavation-area foundation pit support which has the square, striped and round plane shape and is convenient for inner supporter arrangement.

The invention relates to a road and bridge transition section grouting construction method used during jacking construction. According to the method, with a drilling pipe, a plurality rows of scallop grouting holes are drilled from railway shoulders on two sides of a road and bridge transition section towards the lower part of the railway with an inclined downward scallop manner; when one hole is produced, the drilling pipe is fetched, a shock tunnel is inserted into the hole, and grouting fluid is injected; when the grouting fluid level is 2 meters far from the ground, grouting is stopped, a grouting port is sealed, and the next hole is proceeded; an included angle range of the grouting scallop area relative to a subgrade plane is 15-75 DEG, and an adjustment range of adjacent two grouting holes 5 is 5 DEG. With the road and bridge transition section grouting construction method provided by the invention, road and bridge transition sections can be strengthened without breaking normal railway operation; the work space is small; the operation is convenient; and subsidence deformation of the road and bridge transition sections can be effectively controlled, such that uneven subsidence between the road and bridge transition sections and mass boxes can be prevented. Therefore, the method is beneficial for traffic security and personal security of a railway, and provides substantial economic benefits.

The invention relates to the technical field of shield construction, in particular to a construction method for an earth pressure balance shield to pass through a large-diameter sewage main pipe underground, and is used for solving the problems of high construction difficulty, high risk and great casualties and economic loss easily caused by improper control when the shield passes through the large-diameter sewage main pipe underground in the prior art. The construction method comprises the following steps that 1, engineering investigation is carried out, an underwater color television and a geological radar are adopted; 2, the mutual influence of a tunnel and a sewage pipe is predicted, deformation analysis is carried out by adopting a stratum I structure model; 3, construction preparation before underneath pass is carried out, comprehensive statistical analysis is carried out by adopting a 60m experimental section; and 4, shield underneath pass tunneling is carried out, and stratum settlement is controlled through a clay shock method. According to the construction method for the earth pressure balance shield to pass through the large-diameter sewage main pipe underground, the construction difficulty and the corresponding risk can be effectively reduced through engineering investigation, prediction of the mutual influence of the tunnel and the sewage pipe, construction preparation before underneath pass and shield underneath pass tunneling, and therefore casualties and economic losses can be reduced.

The invention discloses a tunnel steel temporary inverted arch with rapid assembly and disassembly, which is characterized in that each temporary inverted arch arranged is formed by fixed joints positioned in the middle, movable joints positioned at both ends of the fixed joints and connection joints connected between the fixed joints and the movable joints; and the fixed joints, the movable joints and the connection joints are arranged in a split mode. With the tunnel steel temporary inverted arch, tunnel convergence and settlement and deformation can be effectively controlled, the tunnel steel temporary inverted arch can be conveniently and quickly dismantled after completing desired functions and can be reused, other inputs are not increased so that the tunnel construction cost is greatly reduced. Construction waste is not formed, amounts of dust and high decibel noise are not generated during installation and dismantling, excellent construction environment is supplied for the internal construction of the tunnel, and the construction security is improved.

The invention discloses a boot last base comb-type tunnel bottom lining structure and a drainage system thereof. The effect of underground water on a tunnel lining bottom structure is reduced or eveneliminated, the problem of karst or underground water development region tunnel inverted arch floating deformation or tunnel bottom structure cracking and damage is solved, and the tunnel constructionand operation stability and safety are ensured. The bottoms of side walls on the two sides of an arch wall secondary lining structure are provided with bases fixedly connected with the arch wall secondary lining structure, the bases are adopted as bearing structures of the arch wall secondary lining structure, and a longitudinal-through boot inner cavity inside the structure is adopted as a tunnel longitudinal drainage channel. A comb-type tunnel bottom structure with the two transverse sides in weak connection with the bases are arranged between the boot-shaped bases on the two sides, a paving bottom layer is arranged on the comb-type tunnel bottom structure, the lower portion of the comb-type tunnel bottom structure is provided with a transversely-spaced and longitudinal-through lower cavity as a tunnel bottom underground water longitudinal drainage channel. The arch wall range drainage system is communicated with the boot inner cavity, the tunnel bottom drainage system is communicated with the lower cavity, and a ballast bed accumulated water drainage system is communicated with the boot inner cavity and the lower cavity.

The invention discloses a red sandstone layer waterproof spraying anchor support method. The red sandstone layer waterproof spraying anchor support method comprises the following steps: a, earthwork between piles is vertically layered and horizontally excavated in a sectioned mode; b, after vertical layering and horizontal sectioned excavation, the excavation face is excavated again in the direction perpendicular to a foundation pit support face, and thus pile bodies are exposed; c, a plastic cloth is fixedly arranged in a vertical pit excavated in the step b; and d, C20 fine stone concrete with the thickness being not smaller than 80 mm is sprayed on a steel bar mesh in the step c. The invention further discloses a waterproof device of the red sandstone layer waterproof spraying anchor support method. The device comprises the plastic cloth, the plastic cloth is vertically mounted on a stone body wall face between the support piles, a steel bar skeleton is fixedly mounted outside the plastic cloth, a grass curtain is fixedly mounted outside the steel bar skeleton, and the steel bar mesh is fixedly mounted outside the grass curtain. The problems that due to the characteristics of stone soil of a red sandstone layer, after red sandstone is supported, the support face is often difficult to support, or generates cracks and even bumps and then falls off due to water seepage of a cobble layer at the top of the red sandstone layer are solved.

The invention discloses a composite foundation bearing structure imbedding precast piles in a high pressure rotary jet pile. The composite foundation bearing structure comprises a high pressure rotaryjet pile cement soil solidifying body formed by forced mixing of cement soil curing agent slurry and foundation soil, the precast piles placed in the high pressure rotary jet pile cement soil solidifying body, and a reinforced concrete cushion cap or raft foundation, box foundation form arranged at the tops of the precast piles; and the water cement cement ratio of the cement soil solidifying agent preparation slurry is generally 0.7-1.1, and auxiliary materials and/or admixture are mixed in the slurry. The composite foundation bearing structure can significantly reduce the soil squeezing effect on the site foundation, increase the side resistance and end resistance standard value of the piles, enhance the bearing capacity characteristic value of foundation soil treated by the high pressure rotary jet pile, so that the bearing capacity of a composite foundation is improved. Through the optimization arrangement of the high pressure rotary jet pile and the reinforced concrete prefabricated piles, the settlement deformation of the foundation can be effectively controlled, and the cost of construction project can be reduced.

The invention discloses a system and a design method applying tree-root piles and pile side compacted grouting, which can be used for effectively reducing disturbance of foundation excavation on an adjacent surrounding building and preventing the surrounding building from sinking. The tree-root piles are tightly arranged between a foundation and the surrounding building; on one hand, the tree-root piles pass through a soil body sliding area between the foundation and the surrounding building and are embedded into a soil body under the soil body sliding area, and when the soil body shifts and is deformed, the shearing resistance of a sliding face of the tree-root piles and the side resistance and rigidity provided by a pile body are improved to limit the deformation development of the soil body after pilling and reduce the sinking and deformation of the building after pilling; on the other hand, when the surrounding building near the foundation is sunk and deformed largely, the lateral deformation of the tree-root piles can be effectively controlled by the method applying pile side compacted grouting, and the deformation development rate of the surrounding building is reduced; moreover, the tree-root piles are tightly arranged, the grouting pressure can be uniformly dispersed into the foundation under protected building facilitates, and direct grouting on the foundation is avoided to make the building facilitates uniformly lifted and protruded.

The invention relates to the field of geotechnical engineering, in particular to an anti-rise U-shaped roadbed structure and a design method thereof. The anti-rise U-shaped roadbed structure comprisesa U-shaped groove body, wherein a plurality of supporting beams are arranged at the bottom of the U-shaped groove body. Reinforcing pile assemblies are connected to the bottoms of the supporting beams; each reinforcing pile assembly comprises a plurality of reinforcing piles, a first filling layer and a second filling layer are sequentially arranged in the U-shaped groove body from top to bottom,the first filling layer is formed by filling soil materials, and the second filling layer is formed by filling light soil. According to the anti-rise U-shaped roadbed structure, the upper load of thereinforcing pile assembly is reduced; most rise acting force on the side wall of the reinforcing pile can be transmitted back to a lower foundation through the anchoring effect of the pile body, so that roadbed rise deformation can be effectively controlled, the overall load of the structure can be effectively borne, and sedimentation deformation is controlled; and the construction land is greatly saved, the land is saved, and the damage to the ecological environment is reduced.

The embodiment of the invention provides a spiral steel pile plate structure and a construction method. The spiral steel pile plate structure comprises a reinforced concrete bearing plate, a pluralityof spiral steel piles and a broken stone hardcore, and the multiple spiral steel piles are arranged at intervals. One ends of the multiple spiral steel piles are connected with the reinforced concrete bearing plate, and the ends, away from the reinforced concrete bearing plate, of the multiple spiral steel piles are fixed in a bearing layer; the broken stone hardcore is laid on the side, close tothe bearing layer, of the reinforced concrete bearing plate. According to the spiral steel pile plate structure and the construction method provided by the embodiment of the invention, land excavation or cement pouring is not needed; the construction disturbance is small, the influence on an existing railway can be reduced and additional settlement of the existing railway can be controlled, the spiral steel pile plate structure is small in working face, rapid in construction, high in pile forming speed, excellent in performance, good in stability and capable of well controlling settlement deformation of a newly-built railway roadbed.

The invention discloses a permafrost region hot rod roadbed design calculation method based on heat budget balance. The method comprises the following steps: collecting air temperature and wind speeddata of a region where a project is located, finding out physical parameters of roadbed filler and foundation soil and natural upper limit depth and ground temperature data of permafrost of a foundation, and measuring the section size of a roadbed; selecting a proper hot rod model according to specifications and engineering requirements; calculating the influence radius of the hot rod refrigeration and the influence range in the roadbed; calculating the annual net heat absorption capacity of the roadbed within the hot rod refrigeration influence range; calculating the refrigerating capacity ofa single hot rod; and determining the number and arrangement mode of the hot rods. The basic principle of the calculation method is to ensure that the annual refrigerating capacity of the hot rod isnot less than the annual net heat absorption capacity of a roadbed-foundation system, a theoretical basis is provided for design and calculation of the hot rod roadbed, the problem of design and calculation of the hot rod roadbed is solved, and the calculation method has great engineering application value. The method is simple, feasible, scientific and reasonable, and roadbed settlement deformation caused by degradation and thaw collapse of permafrost of the foundation can be controlled.

The invention provides a road widening treatment method which comprises the following steps: step 1, arranging a vertical drainage system along the joint of a new roadbed and an old roadbed; step 2, selecting a filler consistent with the old roadbed filler as a new roadbed filler, filling and compacting, and firstly filling sand gravel or gravelly soil at the bottom to serve as a substrate layer;step 3, paving and roughly flattening the roadbed filling material. step 4, paving and finely leveling the roadbed filling material. and step 5, rolling the filling material. The method solves the problems of longitudinal and transverse cracks and other diseases of the pavement after the road widening and reconstruction engineering is completed, can improve the bearing capacity of the foundation,controls the settlement deformation of the newly-filled roadbed, and enhances the anti-benching capacity of the junction of the newly-filled roadbed and the old roadbed and the stability of the widened roadbed.

The invention discloses an underground engineering structure meeting the double-zero condition. The underground engineering structure comprises an existing building and an underground structure, and further comprises an adjustable supporting body, an air pressure monitoring device, a deformation monitoring device and a building bottom plate; the existing building is built on the building bottom plate, the underground structure is arranged below the existing building, and the deformation monitoring device is arranged on the building bottom plate; the underground structure comprises an underground space, supporting enclosures and pile foundations, the underground space is located below the existing building, the two supporting enclosures are oppositely arranged in the underground space, thepile foundations are arranged in the underground space, and the pile foundations are located between the two supporting enclosures; and adjustable supporting bodies are correspondingly arranged at thetops of the supporting enclosures and the pile foundations, and the upper ends of the adjustable supporting bodies abut against the building bottom plate. An inflatable air bag and a one-way exhaustvalve can be prefabricated and installed in advance in a factory, the air bag body is inflated conveniently through an inflator in the construction process of a subsequent building structure, and thewhole construction process is simple, convenient and rapid.