12results about How to "Avoid excavation" patented technology

The utility model relates to a soil retaining structure used between cylindrical piles, and belongs to the field of slope protection, the soil retaining structure comprises supports arranged on the outer walls of cast-in-place piles, the supports between the adjacent cast-in-place piles are in one group, the two supports in one group incline towards the direction close to each other, a soil retaining plate is arranged between the supports, and the soil retaining plate is arranged between the supports. The soil retaining plate is slidably clamped to the supporting baffle, the end face, facing the cast-in-place pile, of the soil retaining plate abuts against the cast-in-place pile, and the sliding direction of the soil retaining plate is parallel to the length direction of the cast-in-place pile. The slope protection construction method has the effect of improving the slope protection construction speed.

The invention discloses an in-situ protection construction method for a large-diameter shallow-buried pipeline in municipal engineering. The in-situ protection construction method comprises the steps that S1, preparation before construction is conducted; s2, stirring pile construction; step S3, pipeline monitoring; s4, embedding steel pipes and reinforcing steel bars; s5, detecting the stirring pile; s6, cap beam construction; s7, prefabricating a cover plate; s8, mounting a cover plate; and S9, earthwork backfilling is conducted. The construction operation is flexible, and the project construction period and quality are guaranteed.

The utility model provides a water conservancy and hydropower wire embedding device, which relates to the technical field of water conservancy and hydropower and comprises an integral structure and moving structures positioned on two sides of the front outer surface and the rear outer surface of the integral structure. The overall structure comprises a bottom plate, a first connecting plate is fixedly connected to one side of the top of the bottom plate, first telescopic rods are fixedly installed at the front and back positions of the inner top of the first connecting plate, and the extending ends of the first telescopic rods are fixedly connected with a frame. According to the soil covering device, soil can be excavated, the excavated soil can be covered through mutual cooperation of a first telescopic rod, a rolling roller and a soil covering part, the soil covers a cable, then the soil is compacted through the rolling roller, and then manual excavation and backfilling operation is avoided; and the labor force of workers can be reduced.

The invention belongs to the technical field of construction, and particularly provides an overwater suspended bearing platform pile head hoop system and a construction method thereof.The construction method includes the steps that S1, a point needing pile sinking is positioned, and pile sinking is carried out on the positioned pile sinking point through hammering; s2, a hoop is installed on the pipe pile subjected to pile sinking; s3, steel beams are installed on the hoops and the pipe piles, formworks are installed on the steel beams, and steel bars are bound on the steel beams; s4, concrete pouring; and S5, after the concrete strength is qualified, the formwork is removed, and construction is completed. The problems that when a suspended platform is built on the water surface of an existing pit pond, foundation excavation, replacement and filling and concrete foundation pouring are needed, the cost is high, the construction period is long, many potential safety hazards exist, the environment is greatly affected, and breeding operation cannot be conducted during construction are solved. Construction can be carried out in an overwater environment, a stable formwork system is built under the condition that no solid ground support exists, pouring construction of a concrete platform is achieved, and meanwhile the requirement for underwater foundation treatment and the construction difficulty are reduced.

The application relates to a replacement construction method of a horizontal tie rod cable of a through tied arch bridge. A permanent tensioning working chamber is designed at the rear end of a main beam horizontal tie rod tensioning area of a bridge abutment, a large-tonnage jack and a temporary support pier are used at the approach bridge end to lift the approach bridge body as a whole to a certain height, and a large and small two sets of winches are arranged at the approach bridge end. The application can realize efficient and safe replacement of the horizontal tie rod under the premise that the abutment back is not dug and the structure of the approach bridge end is not damaged; the construction period is short, the operation is convenient, the cost is controllable, and meanwhile, the construction quality of the tie rod replacement is ensured.

The application discloses a kind of highway reconstruction and expansion new old road embankment joint surface pre-buried grouting reinforcement method, comprising: the position and line of the grouting pipe network to be laid are demarcated on the slope surface after cleaning according to design requirements;Grouting pipe network of grid net structure is laid along the original embankment slope, and grouting guide pipe and grouting valve are installed on the top of grouting pipe network;According to the compaction degree and the rolling thickness of design requirement, fill and compact construction to design elevation layer by layer;Grouting reinforcement;14 days after stopping grouting construction, the grouting reinforcement effect is detected, the grouting guide pipe on the top of embankment is cut off after meeting the design requirements;Finally, the new old embankment joint on the foundation includes original embankment, grid net structure filled with grouting body formed by PVC pipe and expansion embankment;So as to realize the efficient reinforcement of new old embankment joint part.The method can avoid the excavation of soil and rock mixed embankment reconstruction and expansion steps, effectively shorten the construction time and improve the grouting efficiency, and ensure the reinforcement quality.

The invention relates to the technical field of contaminated soil treatment, in particular to a contaminated soil treatment method and system based on a horizontal well injection in-situ reaction zone. The method comprises the steps of planning an expected treatment area according to a pollution area and an underground environment condition; obtaining a governable range of a single horizontal well; according to the expected treatment area and the treatment range of the single horizontal well, the arrangement number and arrangement mode of the horizontal wells and the arrangement distance between the horizontal wells when the number of the horizontal wells is multiple are determined, and a horizontal well group is arranged in the planned expected treatment area; selecting a repairing agent according to pollutant components, and injecting the repairing agent into the expected treatment area by utilizing the arranged horizontal well group, so that the area dip-dyed by the repairing agent is close to the expected treatment area; and the area dip-dyed by the repairing agent is an in-situ reaction zone. According to the method, the optimal in-situ reaction zone is planned in advance based on the pollution area and the underground environment condition, and the remediation agent is combined, so that efficient treatment of stock pollution and risk management and control of incremental pollution can be realized.

The utility model discloses a combined structural body suitable for drainage and seepage of a valley-type tailing pond. A drainage and seepage system is formed by combining a drainage and seepage prism, a horizontal drainage and seepage structure and a vertical drainage and seepage structure (13), the drainage and seepage prism (4) is formed by combining a cement blanket (5), a rockfill body (9), geotechnical cloth (8), a broken stone hardcore (11), a coarse tailing protection layer, geotechnical cloth (8), a coarse tailing protection layer and a dry rubble protection layer (12) on the outermost layer, the horizontal drainage and seepage structure is formed by connecting water collecting pipes (7) and drainage pipes (6), the water collecting pipes (7) are laid in rows along the current dry beach face, and the drainage pipes (6) are laid in rows along the current dry beach face. The drainage pipe (6) is lapped with the water collecting pipe (7); and the vertical drainage structure (13) is arranged on the later-stage drainage dry beach face and penetrates through a tailing sand layer to be connected with the water collecting pipe (7). The drainage structure has the advantages of being convenient to construct, economical, effective, high in applicability and good in drainage effect, and effectively solves the problem that catchment of the valley type tailing pond is difficult to drain in time.

This invention discloses a method for pre-construction of underground structures in land reclamation projects, comprising the following steps: Prefabrication of underground engineering unit structures: Based on the purpose, load, and functional requirements of the underground project, a main structure is designed and divided into multiple unit structures. Each unit structure is prefabricated according to design conditions, with pre-reserved interfaces for assembly; underwater soft soil reinforcement is carried out on the predetermined area where the underground project will be constructed; the unit structures from step one are floated to the predetermined area and sunk to the predetermined position for assembly to form the main structure; land is formed by filling material outside the assembled unit structures; the fill material inside the unit structures is cleaned and transported out; the walls at the interfaces are removed, allowing the internal spaces of adjacent unit structures to be interconnected; and the upper area of ​​the underground structure is constructed. This method solves the problems of long construction periods, high costs, and high risks associated with traditional underground engineering structures in land reclamation projects.

The invention discloses a tunnel boring machine (TBM) pilot-tunnel-free launching operation platform and method. The working platform comprises a concrete foundation and a pre-embedded assembly, wherein the pre-embedded assembly comprises two pieces of connecting channel steel, a plurality of connecting steel bars, a plurality of anchoring plates and a plurality of pre-embedded steel bars; the waist plates of the two pieces of connecting channel steel are parallel, and notches face each other; main bodies of the connecting steel bars are arranged in the length direction perpendicular to the connecting channel steel, and the two ends are fixedly connected with waist plates of the connecting channel steel correspondingly; the plate surfaces of the anchoring plates are fixed on the outer side surfaces of the wing plates of the connecting channel steel in an attached manner; a plurality of embedded steel bars are arranged on the plate surface, close to the connecting channel steel, of each anchoring plate; the pre-embedded assembly is partially embedded in the concrete foundation, so that the plate face, away from the connecting channel steel, of each anchoring plate is 1-2 mm higher than the top plane of the concrete foundation. The operation platform is formed at a time through pouring, the construction workload is small, the bearing capacity is high and reliable through the pre-buried anchoring mode, and normal tunneling of the TBM starting pilot tunnel can be guaranteed.

The present application relates to a kind of horizontal tie rod cable permanent tensioning system of through tied arch bridge and its construction method.The present application includes horizontal tie rod cable tensioning work chamber and personnel access and equipment transport chamber, horizontal tie rod cable tensioning work chamber front end passes through abutment back wall, and is communicated with horizontal tie rod cable tensioning anchorage zone to form integral space;Personnel access and equipment transport chamber are adjacent to the setting of horizontal tie rod cable tensioning work chamber;Personnel access and equipment transport chamber front end passes through abutment back wall, forms passageway;Side door is arranged on the common wall of personnel access and equipment transport chamber and horizontal tie rod cable tensioning work chamber.The present application can realize the permanent construction space of horizontal tie rod stage tensioning, improve construction efficiency and safety;Provide existing operation space for later horizontal tie rod replacement, avoid the need to excavate back due to insufficient space, reduce operation and maintenance cost, significantly shorten the construction period of tie rod replacement.

The present invention discloses a vertical shaft water-lifting L-shaped water diversion structure and a setting method thereof. The structure includes a vertical shaft, a connecting pipe and a water-lifting pump; the method is as follows: excavating a branch tunnel on one side of the plain area until the main branch tunnel intersection, and simultaneously carrying out initial support; after the main branch tunnel intersection is supported, excavating water diversion tunnels upstream and downstream respectively and carrying out initial support; setting up a vertical shaft at a suitable position in the valley, and using the vertical shaft method to construct the vertical shaft; using a rock jacking machine or a directional drill to construct a connecting pipe from the vertical shaft direction to the main branch tunnel intersection; lining the bottom plate and side wall of the vertical shaft, installing a water-lifting pump and its water diversion pipeline; after the excavation of the water diversion tunnel is completed, lining construction of the water diversion tunnel and the main branch tunnel intersection is carried out in sequence; lining the construction branch tunnel or blocking the main branch tunnel intersection. The present invention is suitable for water diversion of small flows from water diversion tunnels to scattered towns in valleys, and has the characteristics of short lines, low investment, small environmental impact, reduced policy processing difficulty, and convenient construction organization.