6results about How to "Solve the reinforcement problem" patented technology

The application belongs to the technical field of tunnel and underground engineering disaster prevention and control, and particularly relates to a cement-polyurethane composite grouting material suitable for dense soft rock reinforcement and a preparation method thereof. The composite grouting material is mainly formed by mixing a penetration cross-linking liquid and a grout vein skeleton liquid. The penetration cross-linking liquid is formed by mixing a grouting material A component and a grouting material B component. A semi-prepolymer is obtained by pre-polymerization reaction of a polyisocyanate and a polyether polyol, and then a diluent and a catalyst are added to the semi-prepolymer to obtain the grouting material A component; a surfactant, a retarder and water are mixed to obtain the grouting material B component; and cement and water are uniformly mixed in a certain proportion to obtain the grout vein skeleton liquid. The cement-polyurethane composite grouting material and the preparation method thereof can achieve penetration-splitting composite reinforcement effect when grouting in a dense soft rock poor geological section with strong density and poor permeability, and the grout preparation process and grouting operation steps are more simple and efficient.

The invention provides a construction method for reinforcing the inside of a top pipe construction tunnel portal well, which has the following advantages: in the construction well of a construction tunnel portal, when a tunnel portal supporting wall is chiseled away, a supporting wall outer side reinforcing steel bar and a protective layer are reserved to serve as a temporary supporting surface of a tunnel portal tunnel face position, and a cross beam and a steel diagonal brace are erected on the temporary supporting surface, so that the tunnel portal tunnel face position is reinforced; by adopting the method of cutting reinforcing steel bars on the outer side of a support wall in a layered manner, dismantling a cross beam and a steel diagonal brace, and pouring low-strength foam concrete in a layered manner to fill a gap space between a tunnel face and a pipe jacking machine head, the problem that no operation space is available for reinforcement outside a construction well or reinforcement is poor is solved, and efficient and rapid reinforcement of a tunnel portal of the construction well is realized; according to the method, the safety of the jacking pipe construction portal is guaranteed, decisive conditions are created for smooth jacking of the jacking pipe, and the method is high in construction speed, free of influences of external geology and operation environment and low in construction cost.

The utility model relates to a formwork reinforcing structure at a construction joint position. The formwork reinforcing structure comprises a batten and a fastener, the battens are longitudinally arranged on the surface of the formwork at intervals, the fasteners are transversely arranged on the upper portions of the longitudinal battens, and the battens are transversely arranged at the upper end opening and the lower end opening of the formwork. The fasteners are pressing strips arranged on the longitudinal battens. The fastener comprises two steel bars, a split screw and a mountain-shaped buckle, the two steel bars are transversely arranged on the upper portions of the longitudinal battens, the mountain-shaped buckle is fixed to the two steel bars, and the split screw penetrates through the formwork to achieve fastening. Under the condition that an operator cannot enter a narrow space, the formwork reinforcing construction can be carried out by adopting a processing mode of the formwork reinforcing device disclosed by the utility model.

The invention discloses a construction method for local replacement of a shield forming tunnel invasion and limit duct piece. The invasion and limit duct piece is replaced in a shield tunnel through replacement equipment. The replacement equipment comprises a sealing structure, a circulation structure, a supporting structure, a duct piece breaking structure, a duct piece replacement structure and a man gate. The sealing structure is used for forming a closed space in the tunnel structure, the tunnel inner support is formed through grouting, the tunnel structure is supported through slurry balance, the stratum can be stabilized without arranging an external support, and the problems existing in existing stratum reinforcement are solved; and the new duct piece is installed through the duct piece replacement structure, so that the replacement operation of the invasion limit duct piece is effectively simplified, the construction period is greatly shortened, and meanwhile, the construction cost is also effectively reduced.

The utility model provides a municipal drainage pipeline groove support blank area reinforcing device, a supported groove is provided with an existing pipeline staggered with a newly-built pipeline, the supporting device comprises a plurality of fixing piles, enclosing purlins, a support, a supporting plate, a cross beam and slings, the fixing piles are inserted into the two sides of the groove side by side, the enclosing purlins are fixed on the fixing piles on the two sides of the blank area, and the supporting plate is fixed on the cross beam. The supports are fixed on the fixing piles and the surrounding purlins on the two sides of the blank area in a plane mode, the supporting plates are arranged between the supports and the side walls of the groove and used for surrounding the retaining wall, the cross beams are erected on the side walls of the two sides of the groove and located on the existing pipeline, and the slings are arranged on the cross beams and the existing pipeline in a sleeving mode and used for fixing the existing pipeline. The bracket is fixed on the fixed piles and the enclosing purlins and is matched with the supporting plate, so that the retaining wall can be effectively enclosed, and soil collapse is prevented; the cross beams are erected on the side walls of the two sides of the groove and located above the existing pipeline, the existing pipeline is fixed in cooperation with the slings, displacement and damage of the existing pipeline caused by soil disturbance in the construction process are avoided, and the safety of the existing pipeline is guaranteed.

The present invention relates to the foundation reinforcement of shoal mud geology, in particular to a construction method for DCM pile mixed foundation reinforcement for shoal mud geology, comprising the following steps: S1. driving steel pipe piles in water near the coast; S2. installing an operating platform system on a steel pipe pile group; S3. arranging a high-pressure rotary jet pile machine on the operating platform system, and using the high-pressure rotary jet pile machine (3) to construct high-pressure rotary jet piles; S4. constructing DCM piles on one side of the high-pressure rotary jet pile group to form a DCM pile group. The construction method for DCM pile mixed foundation reinforcement for shoal mud geology of the present application uses high-pressure rotary jet piles to replace DCM piles in areas with a large amount of miscellaneous fill stones in nearshore shoals, thereby solving the problem of soft foundation reinforcement under geological conditions containing miscellaneous fill stones, and avoiding the risk of slope collapse caused by excavating foundation trenches in nearshore shoal areas; constructing a high-pressure rotary jet pile group until the DCM ship pile machine can enter the water area for operation, and then constructing DCM piles in the water in the area to form a DCM pile group, so as to achieve the purpose of strengthening the foundation.