172results about How to "Avoid uneven settlement" patented technology

The invention discloses a bed course replacing and filling and carbonization reinforcing method of a soft soil foundation and relates to a foundation handling method, in particular to a replacing and filling and carbonization reinforcing method of a large-area shallow soft uneven foundation. The method includes the steps of pit earth excavation, replacing and filling material preparation, pit bottom handling and initial pressurization, ventilating pipe network laying, replacing and filling material spreading and rolling compaction, arrangement of a sealing system, temporary ballasting and carbonization by introducing carbon dioxide gas. The replacing and filling material is prepared from original soil, fine aggregates, coarse aggregates and alkaline curing agent powder, and the fine aggregates and the coarse aggregates contain sand, coal ash, slag, gravel, construction waste and other cheap materials. Gas is introduced through a thin pipe, carbonization is performed through the greenhouse gas carbon dioxide and can be completed in several hours, high strength is achieved, and engineering requirements are met. Differential settlement of structures on the upper portion of the soft foundation can be avoided through bed course replacement and filling and carbonization reinforcement, and the bed course replacing and filling and carbonization reinforcing method of the soft soil foundation has the advantages that advantages that bearing capacity is high, manufacturing cost is low, construction is efficient, and low carbon and environment protection are achieved.

This is a constructive method used to underground; it is a semi-reverse practice inverse join method. Its steps are: After dig earthwork set up the safe guard wall (1) and according following steps: To make temporary sand trough joint (2), it is composed by the wedge trough (3), pad layer (4) and filled layer (5), on the sand trough joint (2) install pattern plate (10), vertical direction reinforcing rod (6), and horizontal direction reinforcing rod (11), to fix the pattern plate by the scaffold, on the pattern plate surface open a pair holes, one end is fixed on the safeguard wall, other end is fixed on the scaffold by binder bolt (7); support rod (9) sustain the scaffold; on the pattern-plate top end, to make 'false cattle-leg' pouring opening, to pour cement slurry: after pouring cement begin to maintain, after maintain dismantle pattern plate and repeat the above steps to the bottom.

The invention discloses a geocell reinforced rubber particles-sand mixture compound shock insulation layer and strip, which belongs to the technical field of structure shock absorbing and shock insulation, and is mainly used for solving the problem of serious destructions of a general multi-story building in an earthquake. According to the invention, the compound shock insulation layer and strip are manufactured by the filling and layered punning of rubber particles-sand mixture mixed by an optimal mix proportion in geocell inner layers; the shock insulation layer is arranged at the bottom of a base; shock insulation strips are arranged on two sides of the base; the geocell is a geotechnique material which can be bought easily and is low in cost; the rubber particles are rubber fragments with certain particle diameters, and are obtained by the mechanical fragmentation of junked tires; the sands are ordinary river sands used for construction. The shock insulation layer and strip have good shock insulation effect, low cost, environmental protection, simple structure, and convenience in construction, and is generally suitable for the compound shock insulation technology of the multi-story building; the technical scheme can effectively solve the problems of bad shock resistance and serious destructions of a low story dwelling in a town, and has a wide application prospect.

The invention relates to the field of steel structure fabrication, in particular to an assembling jig frame for a steel structure. The assembling jig frame for the steel structure comprises a base part and support parts. The assembling jig frame is characterized in that the base part comprises base main beams and tie beams perpendicularly connected with the main beams in a bolted mode, each tie beam is divided into two sections, the two sections of each tie beam are connected by adopting a long-hole bolt, and the separation distance of the main beams can be adjusted through relative motion; each support part comprises a support bottom plate, a bottom circular tube, a support circular tube, corbels, nuts, threaded rods, a top circular tube and a bracket, the support bottom plates are connected with a base in a bolted mode, the bottom circular tubes are perpendicularly welded to the support bottom plates, the support circular tubes are inserted into the bottom circular tubes, the corbels are symmetrically welded to the two side faces of each support circular tube, the brackets are perpendicularly welded to the upper portions of the top circular tubes and inserted to the upper ends of the support circular tubes, and the brackets are in contact connection with the threaded rods which are screwed in the corbels. According to the assembling jig frame for the steel structure, the assembling precision is improved, meanwhile the geometry applicable range is greatly widened, mounting and dismounting are easy, turnover and transportation are convenient, and the assembling efficiency is improved.

The invention discloses an anti-frost heaving and anti-seismic composite foundation structure. The anti-frost heaving and anti-seismic composite foundation structure includes a plurality of rigid captype piles, a coarse sand cushion layer, a rubber pebble stiffened cushion layer, a rubber quake isolation cushion layer and a raft plate, the multiple rigidity cap type piles are evenly arranged in foundation soil, the coarse sand cushion layer is positioned on the foundation soil, the rubber pebble stiffened cushion layer is located on the coarse layer, the rubber quake isolation cushion layer is located on the rubber pebble stiffened cushion layer, the raft plate is located on the rubber quake isolation cushion layer, a blocking plate is placed on the periphery of the coarse sand cushion layer, the rubber pebble stiffened cushion layer, and the rubber quake isolation cushion layer, a building is built on the raft plate. The foundation structure can effectively prevent the foundation frost heave and the earthquake damage deformation and fracture under earthquake in a cold area, improve the mechanics performance of the foundation structure; effectively lower or avoid the enormous economic loss caused by the earthquake and the freezing damage.

The invention discloses a roadbed splicing construction method in expressway reconstruction and extension. The method comprises the following steps: 1, removing surface soil of a roadbed substrate tobe widened, and rolling the substrate after the surface soil is removed before filling; 2, laying geocells on the base, and manually scattering gravels in the geocells; 3, performing slope cutting onthe to-be-widened side of the old roadbed, excavating steps at the slope part from top to bottom, and after the steps are excavated, and laying steel-plastic grids at the roadbed along the step surfaces; and 4, performing layered filling on the roadbed to be widened, and arranging settlement observation points and horizontal displacement observation points in the roadbed filling process. With application of the roadbed splicing method, the new roadbed and the old roadbed are well connected, longitudinal cracks caused by differential settlement of the new roadbed and the old roadbed are avoided, and thus the construction quality of highway reconstruction and extension engineering projects is guaranteed, and the highway construction level of China can be improved.

The invention discloses a wellhead protection device for an automatic underground water monitoring well. The wellhead protection device comprises a barrel body, a cover body and a semi-buried concrete base; the barrel body comprises an outer barrel body and an inner barrel body; the outer barrel body is fixedly connected to the concrete base; the inner barrel body is fixed in the outer barrel body and is provided with a measuring scale; the bottom end of the measuring scale is connected with a floating ball; a hinged rotating shaft hinged to the top end of the outer barrel is arranged at one end of the cover body; and a fixed supporting system is arranged in the concrete base. The wellhead protection device has the advantages that installation and data transmission of an automatic underground water monitoring device are supported; the underground water level can be automatically measured at any time without being influenced by seasonal change of the water level, data comparison and rechecking are facilitated, and the accuracy of monitoring data is ensured; the fixed supporting system in the base is convenient to construct, firm and reliable, and differential settlement of a foundation can be effectively prevented; and the wellhead protection device is suitable for underground water monitoring work in an artificial fill stratum or a coastal soft soil foundation area.

The invention relates to the technical field of building construction, in particular to a construction method of a large-area concrete terrace. The method comprises the following steps of: transversely pre-burying casings on the periphery with the openings of the casings facing outwards during construction of a previous small terrace; after the previous small terrace is molded by pouring, inserting straight rigid rod pieces into the casings, and fixedly connecting the outer ends of the rod pieces projecting out of the openings of the casings with steel bars of a next small terrace; and after the next small terrace is molded by pouring, cutting the rod pieces from the joint between the two small terraces. Due to the adoption of the method, slotted ground can be prevented, and the engineering quality can be improved.

The invention relates to the technical field of high-fill subgrade bridge construction, and particularly discloses a high-fill bridge bearing platform structure construction method.The bridge bearing platform structure comprises a bridge bearing platform, pile foundations and pier studs, the bridge bearing platform comprises a plurality of bearing platform straining beams, so that the multiple bearing platforms form an integral bridge bearing platform structure, and when the bridge bearing platform structure is constructed, the pile foundations are arranged on the pile foundations, and the pier studs are arranged on the pile foundations; comprising the steps that A, a foundation pit is excavated; b) treating the pile head; c) treating a base and pouring a cushion layer, and pouring the cushion layer between the bottom of the bridge bearing platform and the base for integrally pouring the bridge bearing platform structure on the cushion layer; d) steel bars are manufactured and installed; e) mounting a template; f) concrete is poured and maintained; g) removing the template; and H) backfilling and compacting the foundation pit, and integrally pouring the pouring bridge bearing platform structure on the cushion layer, so that a plurality of bearing platforms are poured on the same horizontal plane, an integral stress effect is formed, the stability and stress uniformity of the bridge bearing platform structure are ensured, and overlarge local load is avoided.