32results about How to "Improve soil strength" patented technology

The invention discloses an electroosmotic ecological slope protection maintenance system and a technology. Devices such as a novel conductive plastic water diversion body, a water content sensor and a soil EC (effective concentration) meter are buried in a soil body, so that intelligent control of water supply under a drought condition and drainage in a rainy season for an ecological side slope are realized, disadvantages in manual maintenance are eliminated, the water, fertilizer, time and labor are saved, and the reliability of the side slope is improved. In addition, the problem of poor durability of electroosmotic treatment in the former project is saved, a novel corrosion resistant material is used, a scheme of adding supply liquid is provided, and the electroosmotic efficiency is kept. The method is simple in construction technology and strong in operability, facilitates quality control, has the characteristic of life-long benefit after single construction, and has significant economic benefits and a certain popularization value.

The invention relates to a construction method of a reinforced concrete current-poured pile. The method mainly comprises the steps that (1), a slurry protecting wall is drilled for hole forming, a drilling machine is used for drilling a hole in the hole forming process, and then the hole bottom is chambered through a branch tray forming machine; (2), the expanding end at the bottom of the pile is poured in an underwater concrete pouring mode; (3), a reinforcing cage is manufactured, stirrups are provided with reinforced protection cushion blocks at intervals, and a positioning support is formed; (4), inner side mould bags and outer side mould bags are attached to the inner side and the outer side of the positioning support respectively, and end boards are installed at the bottom of the positioning support; (5), the positioning support and the mould bags are pressed into the hole together; (6), micro-expansion concrete is poured in the space of the inner side mould bags and the outer side mould bags; (7), after the concrete of a pile body reaches the intensity, a pile top closing body and a cover board are constructed. The reinforcing cage is arranged in the reinforced concrete current-poured pile, the pile bearing capacity is improved, influence on the quality of the finished pile from foundation soil is reduced, the construction speed is high, quality is convenient to ensure, and good economic benefits and social benefits are obtained.

The invention discloses a construction method for soft foundation consolidation by utilizing carbon fiber cement mixing piles combined with the electroosmosis method. The construction method is characterized in that conductive carbon fibers are added into the conventional cement mixing piles, and conductive blocks are arranged at the tops of the piles to form electrodes; and besides, a horizontalsand cushion layer and vertical plastic drainage plates are laid to serve as drainage channels, and a calcium chloride solution or sodium silicate solution is injected into the soil among the piles during different periods of time from the top ends of the plastic drainage plates, so as to shorten the electroosmosis period and improve the strength of the soil among the piles. With the adoption of the construction method for soft foundation consolidation by utilizing carbon fiber cement mixing piles combined with the electroosmosis method, the problems of electrode erosion of the electroosmosismethod and gathering and accumulating of gas bubbles are effectively solved, and the advantages as follows are achieved: the construction time is short, the strength of the foundation after treatmentis high, and the post-construction settlement is little

The invention discloses a shield head structure for effectively controlling the ground surface settlement. The shield head structure comprises a cutter head assembly, a shield shell I, a shield shellII, a shell outside injection pipe, a pressure detecting device and a conveying main pipe. The cutter head assembly is arranged at the front end of the shield shell I. The rear end of the shield shellI and the front end of the shield shell II are coaxially and fixedly connected. During tunneling, the ground stress in front of a shield head is detected in real time through the pressure detecting device, the thrust power of a shield tunneling machine is adjusted in real time according to a detection value, and the shield tunneling machine keeps at a stable thrust speed; in the tunneling process, waterproof slurry is discharged to the joint of the shield shell I and the shield shell II through an injection hole, at the moment, muck and the waterproof slurry make contact and are mixed to forma muck waterproof mixture, the muck waterproof mixture is extruded by the exterior of the shield shell II, and the muck waterproof mixture is compacted and fixed to a tunnel goaf surface formed aftertunneling of the shield tunneling machine; and thus, the soil body strength and waterproof treatment of the tunnel goaf surface are improved, the effect of preventing the ground surface settlement isrealized, a slope face is leveled, and the water seepage route is reduced.

The invention discloses special fertilizer for water grass for rice-fish complex planting and breeding. The special fertilizer is prepared from the following raw material components in parts by weight: 20 to 30 parts of potassium sulfate type slow release fertilizer, 8 to 24 parts of humic acid, 18 to 25 parts of ammonium sulfate, 15 to 20 parts of calcium magnesium phosphate fertilizer, 4 to 8 parts of diaminoferric xanthohumate, 6 to 12 parts of attapulgite, and 6 to 10 parts of composite root growth promoting agent. According to the special fertilizer for the water grass for rice-fish complex planting and breeding provided by the invention, growth characteristics and fertilizer requirement laws of the water grass for rice-fish complex planting and breeding are combined, so that accuratenutrition is provided for the water grass, the water grass can quickly grow roots and grow continuously and are promoted to grow new roots and grow new buds, the water grass is developed in root systems and robust in stems, a soil holding force of the water grass is improved, the root amount is increased, the root taking vitality of the water grass is improved, the resistance of the water grass can be also improved, and the requirements of a rice-fish industry on the water grass are met.

The embodiment of the invention provides a deep foundation pit floury soil stratum deep-well well point rainfall construction method and application, and relates to the field of traffic building and construction. The construction method comprises the steps of drilling a plurality of out-of-pit precipitation wells outside a foundation pit, and drilling a plurality of in-pit precipitation wells in the foundation pit; and lowering a plurality of well pipes to the corresponding out-of-pit precipitation wells and the corresponding in-pit precipitation wells to form corresponding in-pit well pipes and out-of-pit well pipes. By means of the deep foundation pit floury soil stratum deep-well well point rainfall construction method and the application, the out-of-pit precipitation wells and the in-pit precipitation wells are combined for precipitation, and the conditions that when light well points cannot meet the precipitation requirement, the number of the light well points are gradually increased, consequently the number of the well points is increased, and the excavation amount is increased are effectively avoided; and in-pit precipitation and out-of-pit precipitation are combined, the groundwater in soil within the foundation pit excavation scope is effectively drained, and construction work of construction machinery and workers in the pit are facilitated.

The invention discloses an inflatable geobag and a construction method thereof. The geobag is composed of at least one geobag units. Each geobag unit is of a semi-closed structure which is composed ofa top closing material, a bottom closing material and an annular double-layer geomembrane. The bottom closing material and the annular double-layer geomembrane are closed in a side pressing mode. Theadjacent edges of the annular double-layer geomembrane are subjected to side pressing treatment. Vent holes are formed in the pressed edges. The annular double-layer geomembrane and the top closing material are closed in a side pressing mode. An inflation port is formed in the annular double-layer geomembrane. The geobag is high in construction efficiency and can be automatically unfolded by inflating the annular double-layer geomembrane, and the geobag can be directly filled without mechanical or manual supporting. When soil is filled with the geobag, a powerful restraint function can be achieved on the soil by the annular double-layer geomembrane, and the soil strength is improved. The geobag is wide in application range, and suitable for the fields of foundation reinforcement, dyke slope protection, retaining wall construction, slope protection and revegetation and the like.

The invention relates to an anchor rod structure for heating curing soil body. The anchor rod structure comprises an anchor rod, the anchor rod comprises an anchoring section and a free section, the anchoring section is provided with an electric heating pipe, the anchor rod is inserted into a drilled hole and abuts against the inner wall of the drilled hole, and the two ends of the electric heating pipe are connected with an external power source through wires. Soil around the anchoring section in the drilled hole is heated through the heating pipe, water in the surrounding soil is gasified and transported, a soil body structure is physically and chemically changed, the bearing capacity of the soil body is increased, the surrounding soil body and the anchor rod body form an anchoring lumpwith a larger diameter, and therefore the bearing capacity effect of the anchor rod is improved; and the anchor rod structure has the advantages that the soil body strength of an anchoring section isimproved, the bearing capacity of the anchor rod is improved, and the length of the anchor rod is reduced.

The invention discloses an improvement device and an improvement method for a collapsible loess roadbed, and relates to the technical field of building construction equipment. The device comprises a machine table, handles are arranged on the two side faces of the machine table, and a first liquid storage tank and a second liquid storage tank are fixedly connected to the bottom face of the machinetable; one surface of each of the first liquid storage tank and the second liquid storage tank is fixedly connected with a micro high-pressure pump; one ends of water inlets of the two miniature high-pressure pumps are respectively communicated with the first liquid storage tank and the second liquid storage tank; and the top face of the machine table is fixedly connected with a mounting frame. The collapsible loess subgrade is reinforced by adopting a chemical reinforcement principle, a chemical reagent is injected into foundation soil by the two liquid outlets in a high-pressure and high-speed rotating state during working, a gelling substance is generated or the surfaces of soil particles are activated through a chemical reaction, and the soil particles are combined, so that the soil body strength of the collapsible loess subgrade is effectively improved.

The invention discloses a controllable air exhausting device for constructing a precast pile in a gas-containing soil layer and a construction method of the device. The device comprises the precast hollow pile, and a closed-opening pile tip is arranged at the bottom of the precast hollow pile; the air exhausting device is arranged at the front end of the closed-opening pile tip and can prevent engineering disasters caused by gas eruption in the gas-containing soil layer, and therefore personal and property losses are reduced; and pile end and pile side soil bearing carrying capacity within the gas-containing soil layer range can be improved, and settlement deformation of a pile foundation obtained after construction is reduced. The construction method of the device is easy and convenient to operate.

The invention relates to the field of environmental geotechnical engineering, in particular to a microbial ecological modification method for expansive soil. The method comprises the following steps: respectively obtaining to-be-modified expansive soil and a sporosarcina pasteurii bacterial solution; mixing urea and calcium salt to obtain a cementing liquid; mixing the sporosarcina pasteurii bacterial liquid and the cementing liquid according to a preset volume ratio, and then adding the mixture into to-be-modified expansive soil for mixing to obtain a sample; maintaining the sample to obtain the green and environment-friendly modified expansive soil. By adopting sporosarcina pasteurii, urea can be continuously hydrolyzed into NH4 < + > and CO3 < 2->, meanwhile, Ca < 2 + > in expansive soil and added CaCl2 is continuously attracted to the surfaces of thalli, and Ca < 2 + > and CO3 < 2-> are combined on the surfaces of the thalli to form calcium carbonate crystals, so that the soil body strength of the expansive soil is enhanced; meanwhile, residual NH4 < + > and Ca < 2 + > in the reaction system can reduce the expansibility of the expansive soil through the effects of neutralizing negative charges and replacing cations respectively.

The invention discloses a coconut fiber and coconut geotextile composite reinforced expansive soil roadbed and a construction method thereof. The coconut fiber and coconut geotextile composite reinforced expansive soil roadbed comprises a foundation layer, a roadbed layer laid on the top surface of the foundation layer and a pavement layer laid on the top surface of the roadbed layer, wherein the roadbed layer comprises a roadbed base body and a plurality of reinforced structure layers; the roadbed base body is formed by mixing and compacting coconut shell fibers and expansive soil, and the reinforced structure layer is mainly composed of coconut shell geotechnical cloth. The expansive soil roadbed mainly solves the problems of poor permeability, water swelling, water loss shrinkage, multiple cracks, humidification and the like of a current expansive soil roadbed, the coconut shell fibers and the coconut shell geotextile are used, the coconut shell fibers and the coconut shell geotextile serve as rib materials, the strength of a soil body is greatly improved, the coconut shell geotextile and the coconut shell fibers are environment-friendly materials, and therefore the expansive soil roadbed is environmentally friendly. And the method plays an important role in protecting the environment and saving resources.

The invention provides a same-hole multi-slurry injection machine tool and a same-hole multi-slurry injection plugging method. The machine tool comprises a grouting head body, a grouting hard pipe andgrouting hoses; the grouting head body comprises two first grouting cylinder parts which are arranged side by side and a second grouting cylinder part, and one-way valve elements are arranged in thefirst grouting cylinder parts; a first transverse channel and a second transverse channel communicating the first transverse channel with the outside are communicated between the two first grouting cylinder parts, and a first temporary plug is arranged at the end, communicating with the outside, of the second transverse channel; a second temporary plug is arranged at the bottom of the second grouting cylinder part; the grouting hard pipe is communicated with the top of the second grouting cylinder part, and the grouting hard pipe is communicated with a hard pipe outer joint; and the grouting hoses are communicated with the tops of the first grouting cylinder parts, and hose outer joints are communicated with the grouting hoses. According to the same-hole multi-slurry injection machine tooland the same-hole multi-slurry injection plugging method, water stopping and leaking stoppage can be achieved rapidly, the soil body strength of a water stopping and leaking stoppage position can beimproved, the double-liquid grouting setting time is easy to master, and the grouting effect is good.

The invention provides a narrow and long open caisson of a thick soft soil layer and a construction method thereof and relates to the technical field of open caisson construction. The open caisson isformed by splicing a plurality of segments. The method comprises the following steps of S1, setting the position of the open caisson, and arranging a cement mixing pile on a soil layer at the open caisson to reinforce the soil layer; S2, manufacturing the first segment above the soil layer; S3, draining away water in an in-well area and cutting earth till the segment descends to a position which is a preset distance from the ground; S4, manufacturing the next segment contrapuntally on the manufactured segment S5, draining away water in an in-well area and cutting earth till the next segment descends to a position which is a preset distance from the ground; S6, repeating the steps 4-5 till all segments are manufactured; and S7, carrying out grouting to the bottom of the open caisson and sealing the bottom. Phenomena such as bottom heave and sedimentation of soil layers around the open caisson due to a too large water pressure in the open caisson in the sinking process can be prevented.

The invention discloses a vacuum preloading and foundation heating combined foundation treatment system. The foundation treatment system is characterized in that a plastic drainage plate is vertically arranged in a to-be-treated soft soil foundation, the plastic drainage plate comprises a core plate and a filter membrane coating the core plate, the core plate is formed by connecting a plurality of relatively independent channel pipes side by side, drainage channels are formed in the spaces between the filter membrane and the outer walls of the channel pipes of the core plate, internal channels are formed by internal channels of the channel pipes, the top end of the channel pipe of each plastic drainage plate is connected with a top end joint, and the bottom end is connected with a top end joint, so that each plastic drainage plate has a hot water circulation channel; a sand cushion layer is laid on the soft soil foundation, a transversely-arranged water filtering pipe is buried in the sand cushion layer, a sealing film is laid on the sand cushion layer, and a closed vacuum preloading system is formed; and circulating water inlets and circulating water outlets of the top end joints at the top ends of all the plastic drainage plates are connected with circulating heating equipment through pipelines to form a water circulating heating system capable of heating the soft soil foundation.

The invention relates to a slope protection technology, in particular to an ecological slope protection method for a steep cliff slope and an ecological pile thereof. According to the method, holes are drilled in the slope top of the slope and the slope surface of the steep cliff, the ecological piles are placed in the holes, the ecological planting bags are arranged in the ecological piles, the seedlings of the climbing plants and the seeds of the grass are arranged in the ecological planting bags, and the seedlings of the climbing plants climb the whole slope surface of the steep cliff after growing to achieve the effects of greening the slope surface of the steep cliff and stabilizing the slope. After grass seeds grow, the steep cliff slope surface can be greened to stabilize the ecological pile, meanwhile, rock and soil bodies of the steep cliff slope surface can be prevented from being weathered, drainage ditches are dug in the slope bottom, and the slope stability is improved. The method is simple in construction, short in construction period and low in cost, landslide disasters can be prevented, the slope is greened while the stability of the slope is improved, and the good ecological slope protection effect is achieved.

The invention belongs to the technical field of building tools, and particularly relates to a rapid emergency pile for a building foundation pit. The rapid emergency pile comprises a main body, a grouting component, a cooling bin, a plug, a pull rope and a connecting component. The emergency pile is rapidly connected with an external tool through the connecting component; the main body is arranged in a soil body of a water seepage area, then the grouting component is pushed into the soil body, after the emergency pile is arranged and the grouting component enters the soil body, a user pulls the pull rope, so that the plug is separated from the cooling bin, cooling liquid in the cooling bin enters the soil body, water in the soil body is frozen, a frozen area with a certain area is formed in the soil body around the emergency pile, then a water outlet passage is blocked, then water in the foundation pit is prevented from seeping into the foundation pit, the foundation pit is temporarily stabilized, then the collapse time of the foundation pit is delayed, then enough safety time is bought for evacuation of personnel in the foundation pit and evacuation of equipment in the foundation pit, and then life and property losses caused by collapse of the foundation pit are prevented.