217results about How to "Delay uneven settlement" patented technology

The invention discloses a preparation of underwater grouting grout based on soft-base large immersed tunnel foundation and a grouting process thereof. The foundation is formed by a 60-cm thick macadam foundation base and a 40-cm thick sodium bentonite mortar foundation and is capable of meeting requirements for tunnel foundation rigidity and requirements for base seismic resistance and water flow scouring resistance. The grout is composed of cement, fine sand, coal ash and sodium bentonite. The grouting process is improved, and pipe inside grouting of embedded grouting holes is adopted. Therefore, large ships are not required to work on river face, underwater operation of divers and navigation risks are reduced, construction safety is greatly improved, and construction cost is reduced. The secondary grouting technology is first adopted in the field of the immersed tunnel to reduce uneven sedimentation in future operation stage of projects. The grouting process provides a reference guide and an experience guide for large dock projects, immersed tunnel projects, municipal administration soft earth foundation strengthening projects, high earthquake region basic project design and other similar projects.

The invention provides a panel construction method of concrete faced rock-fill dam, sequentially including the following procedures: vertical joint cushion layer and sloping surface renovating, emulsified asphalt spraying, reinforcing steel bar system safety, side form sealing up system safety, slip form system safety, concrete pouring, form removal maintenance and peripheral joint and vertical joint sealing up construction; wherein the concrete pouring adopts 'semi-closed type' chute warehousing, and pouring to the top in one step is carried out on the panel. The panel construction method of concrete faced rock-fill dam provided by the invention can carry out one-step construction of panel, thus reducing differential settlement among various dam materials after panel concrete construction, preventing structural crack of concrete panel after retaining water and avoiding that the top of the primary panel is cavity as construction is carried out by stages, so as to ensure the dam to operate safely.

The invention relates to a bridge widening splicing structure and a construction method thereof. The present invention adopts the design principle of "connecting at the top and not connecting at the bottom", that is, the wet joint of cast-in-situ concrete is realized between the upper hollow slabs of the new and old bridges, the bridge deck is continuous, and the lower piers and foundations are no longer connected, and they are relatively independently stressed. To adapt to the differential settlement between the new and old bridges; the outer side plate of the old bridge is replaced, and the pier cover beam is not removed, only the anti-collision guardrail of the old bridge is removed. After the old bridge plate is replaced, the plate is replaced next to the old bridge The edge of the rear beam slab is connected with the beam slab of the new bridge by planting bars, so that the old and new bridges form a solid whole. The inventive method combines many advantages such as simple construction, short construction period, low construction cost, new and old bridges are formed into a whole to bear the force together, etc. The hollow slabs can be replaced by centralized prefabrication and factory construction, and are suitable for highway bridges of all grades. Wide construction, in line with the requirements of building energy saving, building a resource-saving, environment-friendly society, after promotion, it has good economic benefits and social value.

The invention discloses a method for determining soft soil foundation landfill site foundation treatment mode based on foundation bearing capacity. Firstly correction of foundation bearing capacity is carried out according to geological exploration report, then whether the corrected foundation bearing capacity meets landfill site total load requirement is judged, and whether treatment is required is determined according to the judging result, if treatment is required, the selected treatment mode includes foundation treatment by adopting reinforcement cushion rubber (1) or foundation treatment by adopting reinforcement cushion rubber and setting vertical shaft (2). The invention utilizes the load characteristics of large occupying area of landfill site, long load application period and step application, landfill process of landfill site is taken as step loading process, the improvement of foundation bearing capacity in operation period of landfill site is analyzed according to piling, loading and prepressing method, the landfill speed and foundation bearing capacity correspond over time by controlling operation procedure, and meanwhile reinforcement cushion rubber is arranged to provide a drainage layer for soft soil foundation, thus not only improving foundation bearing capacity but also being capable of effectively reducing differential settlement of small repository.

The invention relates to a circular-arched steel-corrugated-plate bridge and culvert structure. A circular-arched bridge and culvert with a reinforced concrete structure is not adaptable to foundation deformation and uneven settlement well, damages caused by earthquakes cannot be buffered effectively, construction cost is high and construction period is long. Bases are arranged at the lower portion of the bridge and culvert structure. Single-span or multi-span bridge arches are arranged on the upper portions of the bases, are steel-corrugated-plate circular arches and are formed by assembly and fixation of steel corrugated plates through bolts. The radius of each steel-corrugated-plate circular arch is 2.1648m, central angle is 135 degrees, arc curvature radius is 4.33m, single span is 4m, and rise height is 1.3365m. A circular-arched bridge and culvert with the structure has axial corrugations and excellent mechanics characteristics, stress strain caused by load is simultaneously distributed axially and radially, stress concentration of the load is effectively dispersed, advantages of a steel structure are exploited better, and wide application prospect is provided.

The invention relates to a cement-based material functionally gradient brick. The functionally gradient brick has an upper functionally gradient layer and a lower functionally gradient layer, i.e. a cement-based material toughening layer and a cement concrete base layer respectively. The fiber cement based material toughening layer is a fiber mortar layer, the cement concrete base layer is a fine aggregate concrete layer, and the vertical direction of the functionally gradient brick is a Z shaped section; the materials of the fiber mortar layer include a cementitious material, fine aggregate, water, a water reducing agent and fiber; the raw materials of the fine aggregate concrete layer include a cementitious material, coarse aggregate, fine aggregate and water. The invention also provides a preparation method of the cement-based material functionally gradient brick. The invention provides the functionally gradient brick and a preparation method thereof, and the functionally gradient brick can alleviate uneven pavement settlement, maintain the pavement shrinkability, at the same time reduces permeation of pavement water to roadbed, and has good breaking resistance and surface freeze-thawing damage resistance, and is suitable for industrial production, thereby reducing pavement diseases.

The invention discloses a tunnel waterproof and drainage structure and a method. The tunnel waterproof and drainage structure includes a tunnel arch wall composed of an initial supporting layer, a waterproof roll layer and a secondary model-building lining layer, wherein the initial supporting layer, the waterproof roll layer and the secondary model-building lining layer are sequentially arrangedon a wall surface of an excavated tunnel; longitudinally extending side ditches are arranged on both sides of an excavated tunnel bottom lining structure; a longitudinal blind pipe is embedded at thebottom of the tunnel arch wall; the two ends of the longitudinal blind pipe bend inward bend and communicate with the side ditches; circumferential drainage plates are arranged between the initial supporting layer and the waterproof roll layer at intervals; a transverse standby drainage pipe is further arranged at the bottom of the tunnel arch wall; and the outer end of the standby drainage pipe communicates with the corresponding side ditches, and the inner end of the standby drainage pipe is positioned at the initial supporting layer. According to the tunnel waterproof and drainage structureand the method, by arranging the standby drainage pipe, when the two end openings of the longitudinal blind pipe are blocked by solidified concrete, the standby drainage pipe can be used to reduce water pressure on the back of the tunnel arch wall, and the damages to the tunnel structure caused by the excessive water pressure are prevented.

The laterally supported pile-slab soilless roadbed of expressway involves the new technology field of expressway construction. It consists of piles, pile-slab connection devices and end cap beams. The beneficial technical effects of the present invention are: a brand-new laterally supported pile-slab frame system is created, which can effectively transmit the upper vertical and horizontal loads caused by automobiles, etc., and the unique connection device of the pile-slab makes the pile and the slab not fully consolidated , have strong adaptability to temperature changes. Because there is no need to fill the piles, the land is saved, the impact on the surrounding environment is reduced, and it is beneficial to the protection of the environment. Pile and slab components are standardized and prefabricated in the factory and transported to the site. The degree of matching construction is high, showing the characteristics of short construction period and good economy. The innovative achievements of the invention will be in the leading position in China.

The invention relates to a rapid solidification construction method for sea mud on a large-area coastal beach. The rapid solidification construction method specifically comprises the following steps of performing construction partition, performing mud excavation, mud piling and draining, spreading an HAS sea mud curing agent, stirring the HAS sea mud curing agent and the sea mud uniformly, performing enclosing material solidification on the mixed soil to obtain a sea mud consolidated body and performing layered and blocked/segmented backfilling and compaction on the sea mud consolidated body.The method has the beneficial effects that the foundation bearing capacity, compaction degree, deflection value and the like after the sea mud is cured by the HAS sea mud curing agent in situ can meetcorresponding standards, uneven settlement can be reduced after layered backfilling, the foundation bearing capacity can reach more than 110 kPa, and common foundation requirements such as field-leveling foundation, building foundation and road subgrade can be met.

The invention discloses a construction process of an urban main road. The construction process comprises the steps of construction preparation, roadbed excavation, roadbed filling, embankment slope protection and pavement construction. The construction preparation process comprises the steps of determining an on-site working boundary line, survey and setting out and cleaning a site; the roadbed excavation process comprises the steps of excavating a base, trimming a slope of a subgrade bed and compacting the subgrade bed; the roadbed filling process comprises the steps of survey and setting out, base treatment, filling, soil filling and rolling compaction, filling and excavating joint part construction and fill section drainage; the embankment slope protection process is carried out, and grass planting protection is adopted when the height H of the embankment slope is less than or equal to 3m; when the height H of the embankment slope is greater than 3m, a mortar rubble framework is adopted for protection; a solid revetment is adopted in the fill pond section; the pavement construction process comprises the steps of laying a graded broken stone hardcore, constructing a cement stabilized broken stone base layer and constructing an asphalt concrete surface layer. According to the construction process, the overall stability of the road surface can be improved, and differential settlement is avoided.

The invention discloses a geocell reinforced cement concrete pavement structure and a surface layer plate thickness calculation method. The pavement structure mainly comprises a base layer, a surfacelayer and a wearing layer which are sequentially laid from bottom to top. The base layer is composed of an upper geotextile layer, a lower geotextile layer and a middle geocell reinforced graded broken stone layer; the surface layer is a cement concrete layer reinforced by a geocell; the wearing layer comprises a cement mixture wearing layer and a geogrid; pull rings are reserved on the two sidesof each geocell in a road direction, the geocells are stretched to be in a tensioned state, and wooden wedges penetrate through the pull rings to fix the geocell at the outermost end. The surface layer plate thickness calculation method mainly comprises the steps of traffic analysis, initial simulation of a pavement structure, determination of pavement material parameters, and checking of load stress, temperature stress and a structure limit state. The problems that an existing pavement structure is low in strength, and a cement concrete pavement is subjected to fatigue fracture, mud pumping,slab staggering and the like under heavy-load traffic are solved, so that the pavement structure has high bearing capacity and deformation resistance, and damage to the pavement structure is reduced.

The present invention relates to a new-type light road bed material and its preparation method. It is made up by using industrial waste slag and discarded foamed plastics as main raw material, addingactivating agent and water and stirring them. Said method possesses high strength, good hydraulicity and strong deformation resistance, so it is an ideal roadbed material.

The invention discloses a multi-cylindrical foundation combined foundation structure system. The connecting lines of the center points of four cylindrical foundations form a quadrangle; a pile body is arranged on the top of each cylindrical foundation; the central line of each pile body and the central line of the cylindrical foundation corresponding to the pile body are on the same straight line; a node connecting component is arranged above the center positions of the four cylindrical foundations; a profile steel beam is connected between the node connecting component and the outer side of the top of each pile body; each profile steel beam is downwards inclined from the end part connected with the node connecting component to the end part connected with the pile body; an inter-pile support are connected between the roots of the pile bodies; an overall steel pipe is connected between every two cylindrical foundations. The relatively large torque transferred by an upper part structure is approximately converted into tensile force and pressing force at the cylindrical foundations through each profile steel beam and each pipe body, so that the highest bearing capacity of the cylindrical foundations is achieved, materials are saved, the complete technology of 'floatation transportation, sinking and leveling' can be realized during construction, the construction period is short, and the building cost of an offshore wind power station is reduced.

The invention provides a transition structure for preventing and treating bump at bridge-head and a construction method thereof. The structure of the transition structure for preventing and treating the bump at the bridge-head comprises a beam body; bridge abutments are fixedly mounted at the two ends of the beam body; one ends of towing plates are fixedly mounted at the middle parts of the bridgeabutments; the other ends of towing plates are buried in a subgrade; the parts behind the bridge abutments and the upper parts of the towing plates are filled with backfilled earth; combined approachslab members are laid on the upper surface of the backfilled earth; and one ends of the combined approach slab members are fixedly mounted on the external sides of the upper ends of the bridge abutments. The construction method comprises the steps of erecting the bridge abutments molded with brackets, constructing the towing plates on the brackets to form two layers of backfill structures, and arranging the combined approach slab members to improve a bearing structure; and therefore, road surface roughness and breakage at the bridge head connecting part caused by uneven settlement of the backfilled earth in the using process are reduced to realize an effect of preventing and treating the bump at the bridge-head; and meanwhile, through the structure combination, energy saving and environmentally friendly properties are realized, the construction period is shortened, template members are saved, and accuracy and quality are very well guaranteed.

The invention relates to a railway roadbed structure for reducing roadbed settlement deformation through an opposite-pulling rib U-shaped groove. The U-shaped reinforced concrete groove with an upwardnotch is formed in the bottom and filled with a roadbed stacking and filling material, the top of the roadbed stacking and filling material is flush with the top edge of the U-shaped reinforced concrete groove and provided with railway ballast, and a railway track structure is arranged above the railway ballast; and opposite-pulling ribs are transversely arranged in the U-shaped reinforced concrete groove, and the two ends of each opposite-pulling rib extend out of the U-shaped reinforced concrete groove. On the one hand, lateral deformation of a roadbed body is greatly restrained through theU-shaped opposite-pulling reinforced concrete groove, roadbed body stuffing is stacked and filled or concrete is poured within the limited space with lateral confinement, and roadbed body settlementis controlled to a great degree; and on the other hand, the occupied width of the bottom of a roadbed is greatly reduced, and plenty of requisition land and plenty of foundation treatment area are saved.

The invention relates to a construction method of pouring a retailing backwall using foam light soil in a highway reconstruction and extension project. Firstly a base is cleaned and compacted, a layerof broken stones with the thickness of 30 cm is laid, steps are arranged along the route driving direction and along one side, close to a road center line, of the cross section direction, a convex step is poured by using a form hanger on the side close to a side slope, and the steps are arranged for better lapping of the foam light soil and subgrade soil. Waterproof geomembranes are laid on the lowest layer and the topmost layer of a foam light soil structure, and earthwork standard rooms are laid on the positions which are respectively 50 cm from the bottom layer and 50 cm from the top layerto enhance the overall strength. By adopting the construction method, under the condition that the area at the retailing backwall is small and is not favorable for construction of a large-scale instrument, the construction can be simplified, the operation is convenient, by utilizing the features of quick early strength formation and good integrality of the foam light soil, the dependency on lateral wrapping soil is reduced, and template supports are used instead for pouring. The construction method has a relatively good effect on reducing bump at bridge-head.

The invention discloses a ribbed waterproof and water-draining coiled material and a construction method thereof. The ribbed waterproof and water-draining coiled material comprises a waterproof layer,a supporting layer and a water-draining layer, wherein the supporting layer is positioned between the waterproof layer and the water-draining layer; and the waterproof layer, the supporting layer andthe water-draining layer are connected integrally. The waterproof layer, the supporting layer and the water-draining layer are simultaneously arranged on the ribbed waterproof and water-draining coiled material, so that the ribbed waterproof and water-draining coiled material simultaneously has functions of improving foundation or roadbed carrying ability, obstructing underground water and solving the problem of water drainage of a foundation or a roadbed, then uneven sedimentation of the pavement of the foundation and roadbed is reduced, reflection cracks between structure layers of the pavement of the foundation and roadbed are prevented, the stability of the integral structure of the foundation and roadbed is improved, and the service lives of a building structure and a road are prolonged.

The invention discloses a construction process of an airport runway, which belongs to the field of the airport construction. The construction process comprises the following steps: removing the surface plant soil, flattening the field, tamping the soil foundation, constructing a liner layer, constructing a basic layer, and constructing a surface layer. The construction process not only can solve the problems of foundation settlement, frost heaving and salt heaving caused by the water permeation, but also can improve the overall performance of the foundation, and can improve the rigidness of the foundation, so that the dynamic response of the pavement surface layer under the dynamic load effect of an airplane can be improved, and the disease problem of the airport pavement can be fundamentally solved.

The invention discloses a composite pile body formed by concrete and a concretion body and a construction method thereof; the composite pile body is formed by the different combination of the concrete pile body, a pile side concretion body formed by slurry sprayed from the pile side and a pile bottom concretion body formed by slurry sprayed from the pile bottom; the construction method comprises that: a hole is drilled to a preset depth by a driller; according to the need of a design proposal, the pile bottom concretion body is formed after slurry is sprayed from the pile bottom; the concrete is affused by lifting a drill stem, and the pile side concretion body with different shapes is formed by controlling the rotation of the drill stem and the spraying of the slurry; after the drill stem is lifted to the pile top and a height mark is designed, if the pile body is a reinforced concrete type composite pile body, a steel reinforcement cage also needs to be inserted to complete the construction of the composite pile body. The composite pile body formed by the concrete and the concretion body and the construction method can effectively improve the bearing capacity of the pile body and has high construction efficiency and high economical efficiency.