46results about How to "Effective consolidation" patented technology

The invention discloses a soft and weak wall rock tunnel advance reinforced support construction method. When a pipe roof advance support construction is carried out on one segment of the constructed tunnel, the construction method comprises the following steps: (1) support arch and guide pipe construction, wherein a plurality of guide tubes for carrying out guiding on a plurality of pipe roof pipes are arranged on a support arch; each pipe roof pipe comprises a pipe body and a drill bit; each pipe body is formed by splicing a plurality of pipe joints; each drill bit is coaxially arranged at the front end of the pipe body; the pipe joints are spiral steel pipes; the pipe roof pipes are first pipe roof pipes or second pipe roof pipes; and the first pipe roof pipes and the second pipe roof pipes are staggered; (2) drilling machine and slip casting machine installation and emplacement; (3) pipe roof advance support construction, which comprises the following processes: first pipe roof pipe drilling and synchronous grouting construction, final hole grouting construction of the first pipe roof pipes, second pipe roof pipe drilling and synchronous grouting construction and final hole grouting construction of the second pipe roof pipes. The method disclosed by the invention is simple in steps, reasonable in design, simple and convenient to construct and good in support effect; and the soft and weak wall rock tunnel advance reinforced support process can be simply, conveniently and quickly finished.

The invention discloses a silt retaining and consolidating method for use in debris flow gully ecological engineering and use thereof. The method comprises: planting a plurality of brush woods for increasing the roughness of the gully bed in a silt transfer area between a debris flow flowing area and a silt settling area in the gully; planting bank-protecting and scouring-preventing forest at the foot of a slope of the gully along the bank of the gully for preventing flowing water from scouring the silt on the bank of the gully; and planting arbor and bush combined improved protection forest in the silt settling area to improve the impact strength of soil body. When the method is used, the use of other civil engineering measures in combination is determined according to the occurrence frequency of debris flow. Compared with the prior art, the method can effectively retain, consolidate and improve the silt in the silt transfer area, on the gully slope and in the silt settling area in the debris flow gully, consolidate and improve retained and deposited silt while reducing silt sources, improve the self-stability of the silt soil body in the silt settling area, strengthen the sand control capability of the gully and improve the landscape of the gully.

The invention discloses a polyurethane reinforced material which is characterized by comprising a component A and a component B, wherein the component A comprises the following components in parts by weight: 20-45 parts of polyether polyol A, 25-55 parts of polyether polyol B, 5-10 parts of polyether polyol C, 5-15 parts of a flame retardant A, 5-10 parts of a flame retardant B, 0.2-0.5 parts of an amine catalyst, 0.1-0.5 parts of a tin catalyst and 0.5-1.0 parts of a foam stabilizer, and the component B is polymethylene polyphenyl polyisocyanate. The polyurethane reinforced material further comprises 3-8 parts of a viscosity reducer. Compared with similar materials, the material has better permeability and higher mechanical property, and broken coal and rock masses can be fixedly combined integrally and effectively due to ultrahigh tensile compressive strength and binding performance, so that the top plate and two uppers can bear pressure actively. The material does not contain poisonous volatile and corrosive matters, so that the material satisfies the demand of safety and environment-friendliness of materials under the shaft.

The invention discloses a synergetic resource processing method of waste fly ashes and metallurgical dust. The synergetic resource processing method of the waste fly ashes and the metallurgical dust comprises the following steps that after the waste fly ashes, the metallurgical dust and solid fuel mixed materials are prilled or briquetted, drying and high-temperate roasting are conducted, smoke dust containing K, Na, Pb and Zn is recovered from smoke, and slag materials are iron-contained furnace materials. By means of the synergetic resource processing method of the waste fly ashes and the metallurgical dust, the qualified iron-contained furnace materials with harmful element content being below 0.05% can be obtained and can be directly used as ironmaking raw materials, the smoke dust which is rich in valuable metals such as K, Na, Pb and Zn is recovered, self-contained dioxin of the fly ashes is degraded, and the purpose of synergetic resource of the waste fly ashes and the metallurgical dust is achieved.

The invention discloses a cap beam which is efficient, convenient and quick to construct, and the cap beam comprises a cap-shaped cap beam reinforcement cage and is characterized in that a cap beam embedded part is arranged in the middle of the cap beam reinforcement cage. An erection method of the cap beam comprises the following steps of manufacturing the cap beam, performing pier column construction, embedding prestressed reinforcements and splined hole steel pipes, hoisting the prefabricated cap beam to the top of a pier column with hoisting equipment, connecting the prefabricated cap beam with the prestressed reinforcements, tensioning the prestressed reinforcements, concreting and grouting the cap beam embedded part of the prefabricated cap beam, and concreting and closing the top ends of the prestressed reinforcements. The cap beam and the method give full play to the advantages of cap beam construction; the pier column is effectively and fixedly connected with the cap beam by adopting the prestressed reinforcements and the splined hole steel pipes; the prefabricated cap beam is hoisted directly, so that treatment on a foundation is reduced; the existing road traffic pressure is reduced; the support erection time is saved; the construction period is shortened; and in short, the method is more scientific in working efficiency, economy, environmental protection and the like in comparison with the currently adopted method.

The invention discloses an overburden pressure loading device applied to a geotechnical vibration table test. The overburden pressure loading device comprises a model box, an air bag, an air source and a pressing cover, wherein the air bag is arranged inside the model box and is connected with the air source by virtue of a pipeline; the pressing cover covers an opening of the model box and is fixedly connected with the wall of the model box. By virtue of the overburden pressure loading device applied to the geotechnical vibration table test, the depth of foundation soil researched in an existing vibration table test can be effectively expanded, and thus technical support is provided for deeply researching the dynamic characteristics of deep soil.

The invention discloses a consolidation growth-promoting stabilizer, and a preparation method and an application method thereof. The stabilizer is composed of the following components, by weight: 20-50% of common Portland cement, 1-30% of fly ash, 5-10% of silica fume, 30-50% of dihydrate gypsum, 0.5-1.5% of a dispersant, and 5-15% of sodium polyacrylate. The above components are prepared into liquid by using water with the method disclosed by the invention. When in use, with the method disclosed by the invention, soil is consolidated with a slurry injection manner using a high pressure gun. The stabilizer provided by the invention has high stabilization capacity and high adhesion to soil. With the stabilizer, soil capacities of absorbing and storing water can be improved. While an easily-weathered slope is effectively stabilized, sowed seed normal germination and growth can be ensured and can be promoted to a certain extent. Therefore, erosion can be resisted, vegetation restoration can be promoted, and good soil stabilization and regeneration effects can be realized. When the stabilizer is used in treatments of desertified areas and slopes, even more outstanding effect can be performed.

An overweight force field vibration-table loading device comprises a centrifugal-system rotating arm, a support, a basket, a centrifugal shaking table and a model case. The model case is placed on the top side of the centrifugal shaking table and is arranged in the basket of the centrifugal system; a pressure loading unit is arranged on the model case and comprises an airbag and a pressure cover, the airbag is arranged in the model case, and the pressure cover covers the opening of the model case and is fixedly connected with the case wall of the model case. By the arrangement, depth in study of foundation soil of tests of an existing centrifugal vibrating table can be effectively expanded, and technical support can be provided for in-depth study of dynamic properties of the deep soil.

The invention provides a synergistic curing treatment method of electrolytic manganese residues and phosphogypsum waste residues. The synergistic curing treatment method comprises the following stepsthat the uniformly mixing the electrolytic manganese residues and phosphogypsum is carried out, a certain amount of water and a soft soil curing agent are sequentially added, uniformly stirring is carried out, a mixture of the electrolytic manganese residues and phosphogypsum after being added with the soft soil curing agent is placed for a period of time, then reacting is carried out, and curingan obtained test block for a period of time under a certain curing condition is carried out. According to the synergistic curing treatment method of the electrolytic manganese residues and the phosphogypsum waste residues, the addition amount of the soft soil curing agent used when cementing and curing electrolytic manganese is carried out through the method is small, the unconfined compressive strength can be greatly improved, the softening coefficient is obviously enhanced, the effective consolidation resource utilization of the electrolytic manganese residues and the phosphogypsum can be realized, high-consumption resource consumption of roadbase and dam body materials on an electrolytic manganese material can be effectively carried out, the pollution of the electrolytic manganese residues and phosphogypsum to the mine environment can be effectively reduced; and by utilizing the characteristics of high strength of a concretion body in the electrolytic manganese residues curing process and difficult dispersion of phosphogypsum in the phosphogypsum curing process, a green process for treating waste with waste is realized.

The invention discloses a soil stabilizer capable of improving the drying shrinkage performance of compacted soil and a preparation method of the soil stabilizer. The soil stabilizer is prepared fromthe following raw materials (in percentage by mass): 30%-40% of hydroxysuccinic acid, 15%-20% of triethanolamine ester, 12%-18% of water-soluble hemicellulose, 10%-20% of water-soluble starch and 20%-40% of water. The soil stabilizer of the invention have the following beneficial effects that: (1) the formula of the soil stabilizer is reasonable and scientific in collocation, the properties of soil can be changed, so the effects of solidifying and hardening the soil and reducing the shrinkage of the soil in the hardening process are achieved, dry shrinkage resistance is excellent, and the soilstabilizer is an ideal soil stabilizer for projects such as highway subgrades or subbases; and (2) the soil stabilizer provided by the invention is mainly applied to reinforcement soil of highway subgrades or subbases and other projects, can also be used for soil reinforcement of water conservancy projects, airport projects and the like, and has a wide application range.

The invention discloses a construction method of riparian buffer strips for reducing non-point source pollution of broken farmland landscape. The method comprises following steps: (1), a suitable construction area on the riverside is constructed; (2), land is levelled and terrain modification is completed preliminarily for planting of fast-growing pasture vegetation; (3), runoff catchment and distribution systems such as water storage ditches, overflow ditches and the like are constructed; (4), fast-growing pasture seedlings with row spacing being 0.5 m and line spacing being 1 m are uniformly planted in the construction area, average plant height of pasture after growing 3 months can reach about 1 m, and dominant communities are formed; (5), a guide flow path is formed by agricultural waste water and rainfall runoff through the runoff catchment and distribution systems, and the agricultural waste water and the rainfall runoff uniformly and slowly flow into the buffer strips and slowly flow into a river after purified by a soil vegetation system. The riparian buffer strips are constructed through planting of the fast-growing pasture grass hybridized pennisetum americanum and simple distribution and catchment engineering measures, so that concentration of nitrogen and phosphorus pollutants of effluent runoff of the buffer strips and water yield are remarkably reduced, and ecological benefits of river water are increased.

The invention relates to the field of equipment of road construction and maintenance machinery, and aims at providing a novel reactive resin adhesive and a synchronous rubble scattering machine using the adhesive. The adhesive is prepared by mixing an epoxy resin as a component A and a component B in a mass ratio of approximate 1:1. The synchronous rubble scattering machine comprises a walking framework with wheels, wherein a storage tank is arranged at the front part of the framework; a rubble cabin for holding rubbles is arranged at the rear part of the framework; the adhesive which is prepared by stirring is sprayed to the ground by a nozzle through a conveying pump; the rubbles inside the rubble cabin can be uniformly distributed through a cylinder and a guide plate at the lower part of a scattering device and are subsequently dropped onto the ground. The adhesive provided by the invention can be effectively and solidly combined with the boundary of a steel plate, and has short curing time and high curing strength; the situation of manual construction of the conventional synchronous rubble scattering machine is changed, the manual construction is changed into mechanical construction, overall machine integration is achieved, the working efficiency is improved, and the cost is effectively lowered.

The invention relates to an artificial stone based on a deposition method and CO2 driven consolidation and a preparation method thereof. The artificial stone based on the deposition method and CO2 driven consolidation is formed by uniformly mixing multi-graded powder containing a cementing material with water, then forming a closely-packed green body structure through the natural deposition effect of the multi-graded powder and then carbonizing under the action of CO2 gas. According to the invention, the raw material composition of the artificial stone is all inorganic materials, the matrix composition is calcium carbonate and is close to natural limestone stone, high-temperature pressing or sintering is not needed in the preparation process, the requirement for equipment and mold is low through a natural deposition pouring forming method, the surface of the artificial stone shows a ceramic glaze-like effect after demolding, grinding and polishing are not needed, the preparation cost is low, the process is simple, the artificial stone forms cemented hardening strength through a mineralization reaction of CO2 gas, CO2 can be effectively solidified in the preparation process, organic adhesives such as unsaturated polyester or polymethyl methacrylate and other resins do not need to be used, the weather resistance is good, and good environmental protection benefits are achieved.

A coal mine loose powder coal body anchor rod drill hole hole-forming construction technology includes the steps that after construction of a drill hole of an anchor rod is completed, a stirring capsule resin is injected in the drill hole of the anchor rod, all the designed capsule resin is injected into the hole at one time, workers use the anchor rod to push the capsule resin until the capsule resin cannot be pushed continuously, and a torque nut matched with a drilling machine is used for pushing the anchor rod; the slow-speed of revolution is used, a creep speed capsule resin is slowly pushed to the hole bottom, when the capsule resin reaches the hole bottom, the drilling machine is regulated to fast revolution, after the creep speed capsule resin is completely solidified, and the torque nut is opened under the driving of an anchor rod drilling machine to enable the anchor rod to reach a designed preload. By improving installing construction technology of the anchor rod, the difficulties that when the anchor rod is used to construct in the coal mine loose powder coal body, the drill hole is prone to deforming and collapsing, the anchor rod cannot be installed to the hole bottom, and the construction cannot reach the designed installing size can be effectively solved. According to the coal mine loose powder coal body anchor rod drill hole hole-forming construction technology, the anchor rod can be effectively solidified with the capsule resin in the loose powder coal body, the anchor rods with various designed installing sizes can be met, and the construction quality ofthe anchor rods can be guaranteed.

The invention relates to a bottom mud drying consolidation agent and a preparation method thereof, and belongs to the technical field of bottom mud drying treatment. The bottom mud drying consolidation agent is prepared by uniformly mixing 20 to 60 percent of Portland cement, 10 to 30 percent of modified coal ash, 5 to 15 percent of quick lime, 5 to 15 percent of magnesium oxide, 0.4 to 1.8 percent of sodium carbonate, 1 to 5 percent of gypsum powder and 0.5 to 2 percent of silicon micropowder. The grain size of the bottom mud drying consolidation agent is 100 meshes. The modified coal ash isobtained by performing alkali excitation on high-calcium coal ash in a sodium hydroxide solution of 1 to 3 mol / L for 2 hours. The bottom mud drying consolidation agent provided by the invention can dry the bottom mud with water content being more than 60 percent within short time (2 to 5 days) to enable the water content to be less than 20 percent, and heavy metal elements in the bottom mud can beeffectively solidified and stabilized. The bottom mud drying consolidation agent has the following advantages: the consolidation agent is wide in raw material source and small in admixture amount, sothe cost is low and large-scale promotion is benefited; furthermore, the raw material composition is beneficial for improving the quality of subsequent building material products and true bottom mudhigh-additional-value utilization is realized.

The invention discloses a construction method of shield departure and reception binary slurry injection. The method comprises the following steps that construction preparation is performed; measurement and locating are carried out; drilling is performed; slurry is mixed; a shield tunneling machine is pushed; a binary slurry injection pump is used for injecting filling materials and additives into a slurry injection hole, and a cutter head of the shield tunneling machine rotates continuously in the slurry injection process; binary slurry is continuously injected, and the shield tunneling machine begins to be pushed forwards after friction force between a wrapped shield tunneling machine and surrounding soil is larger than a set value; the binary slurry is continuously injected when the shield tunneling machine is pushed; after the slurry is solidified, a tunnel portal continues to be broken till the cutter head of the shield tunneling machine is completely disengaged from a station maintenance structure. The construction method of shield departure and reception binary slurry injection is applicable to all stratums, long-time slurry grouting reinforcement is not needed, complement grouting is not needed during tunnel portal construction; enough pushing counter force can be provided when the slurry wraps the shield body, and the shield tunneling machine departure and reception section molding tunnel quality is effectively improved; the equipment is simple, conveying is easy and convenient, materials are efficiently utilized, and the material cost is saved.

The invention provides a method for preparing a low temperature welding titanium carbide coating. Titanium carbide micro powder is welded to the surface of matrix metal through low-melting-point alloypowder and a flux under the low temperature condition, and the influences of too high welding temperature on the properties of the matrix metal are reduced. The method mainly comprises the followingsteps that 1, the low-melting-point alloy powder, the flux and the titanium carbide micro powder are evenly mixed into paste according to a certain proportion; 2, the prepared paste containing the titanium carbide micro powder is evenly smeared on the matrix surface; 3, the material coated with the paste is heated to a certain temperature, and the titanium carbide micro powder is solidified on thematrix surface through welding; and 4, finally, the surface of an obtained finished product can be subjected to copper plating and diffusion annealing, so that the higher bonding strength can be achieved. The titanium carbide coating prepared through the method is high in bonding force and strength, and thus the finished product machining quality and efficiency are greatly improved.

The invention relates to the technical field of building materials, in particular to a surface application composite migration corrosion inhibitor and a preparation method thereof. The surface application composite migration corrosion inhibitor comprises an organic component, an inorganic component and water, the organic component is formed by compounding diethanolisopropanolamine and alkylol amine Nn, the inorganic component is nitrite, and n is a natural number. The corrosion inhibitor can be used for corrosion media chloride ions and sulfate ions at the same time, and the defects that a traditional corrosion inhibitor is large in dosage, low in efficiency and single in effect are overcome. The triethanolamine and other alcohol amine components make up the risk of accelerated corrosion caused by insufficient mixing amount of sodium nitrite, and sodium nitrite makes up the possibility of corrosion inhibitor failure after the organic components are degraded under concrete or corresponding alkaline conditions. The organic component and the inorganic component are used together, and the double protection effect is achieved for the steel bar corrosion problem. The surface application composite migration corrosion inhibitor serves as an external component and can perform corrosion protection on an existing reinforced concrete structure in an external coating mode.

The invention discloses a collapsible loess composite grouting material, which comprises a liquid A and a liquid B. The liquid A and the liquid B are independently stored and mixed in use. The liquidA comprises following components in parts by weight: 60-100 parts of water, 100 parts of cement and 5-15 parts of an accelerator. The liquid B comprises the following components in parts by weight: 100 parts of water and 100 parts of water glass. The grouting material has the advantages that the solidification speed is quick, the solidification time is easy to control, the permeability is good, and the impermeability is good. The grouting material is suitable for solidification of tunnel full-section water-rich collapsible loess, collapsible loess foundation treatment of newly-built buildingsor equipment foundations and collapsible loess foundation treatment of buildings or equipment foundations with differential settlement. The invention also discloses a preparation method of the collapsible loess composite grouting material. The preparation method comprises the following steps: fully stirring 60-100 parts of water and 100 parts of cement to form cement slurry, adding 5-15 parts of an accelerator into the cement slurry to form a liquid A; and uniformly stirring 100 parts of water and 100 parts of water glass to form a liquid B. When the collapsible loess composite grouting material is used, the liquid A and the liquid B are mixed to obtain the collapsible loess composite grouting material.

The invention provides a foundation pit supporting and foundation treatment synergistic effect method and structure. The foundation pit supporting and foundation treatment synergistic effect method and structure are used for reinforcing a construction area before foundation pit excavation is conducted in an upper-hard and lower-soft composite stratum. The method comprises the following steps thatthe side boundary of a foundation pit is determined in the construction area, and a dewatering tube well is arranged; precast piles is constructed in the passive area of the foundation pit to reinforce the bottom of the foundation pit; a waterproof curtain is arranged, flexible piles are constructed in the passive area of the foundation pit to reinforce the bottom of the foundation pit, foundationpit edge reinforcing bodies are constructed along the inner side of the side boundary of the foundation pit, and foundation pit inner reinforcing bodies are constructed every other preset distance inthe longitudinal direction of the foundation pit, the foundation pit internal reinforcing bodies transversely extend along the foundation pit and are connected to the foundation pit edge reinforcingbodies which longitudinally extend along the foundation pit on the two sides of the foundation pit; and the fender posts are constructed by fitting the outer side of the foundation pit edge reinforcing bodies and along the side boundary of the foundation pit. By the adoption of the synergistic effect method and structure, the technical problem that in the prior art, construction machinery has to work on a substrate soft stratum, and consequently construction is difficult can be solved.

The invention discloses a short pier rigid-frame bridge pier bottom structure with a function of greatly reducing bearing bending moment. According to the short pier rigid-frame bridge pier bottom structure, shrinkage and creep of concrete are greatly reduced, the section bending moment near the short pier rigid-frame bridge pier bottom under the temperature effect and the live load action is greatly reduced, cracking of the concrete near the pier bottom of the short pier is avoided, or, the crack width of the concrete is greatly reduced, the durability of the structure is guaranteed, and theapplication range of the continuous rigid-frame bridge is enlarged. The short pier rigid-frame bridge pier bottom comprises a bridge pier and a foundation bearing platform, the upper end and the lowerend of the bridge pier are fixedly connected with a bridge main beam and the foundation bearing platform correspondingly, and the short pier rigid-frame bridge pier bottom structure is characterizedin that the bridge pier is disconnected at a position near the pier bottom to form two sections, namely, a bridge pier upper portion and a bridge pier lower portion, a circular seam is formed betweenthe corresponding end faces of the bridge pier upper portion and the bridge pier lower portion, a steel plate hinge for bearing vertical axial force is arranged between the bridge pier upper portion and the bridge pier lower portion, and the steel plate hinge extends into the bridge pier upper portion and the bridge pier lower portion in the vertical direction in a fixedly connected mode.

The invention discloses a grouting device and method of external sealing and back pressure for concrete water seepage treatment. The grouting device comprises external sealing steel plates, pressure air nozzles, grouting nozzles, elastic sealing strips, a pressing and pasting fastener and a pressing and sealing fastener. According to the grouting device, when concrete water seepage treatment is conducted, one or more external sealing steel plates pasted with the elastic sealing strips at periphery are sealed on the concrete water seepage surface by adopting expansion bolts, back pressure grouting treatment of concrete water seepage appearance after full sealing can be achieved, a fast-setting and early-strength expoxy grout with good permeability is adopted by grouting, the pressure air nozzles and the grouting nozzles are arranged on the external sealing steel plates, a mixed grouting technology of pressure air and pressure grouting is carried out, the concrete water seepage can be effectively filled, permeated and consolidated from outside to inside, and the double effects of waterproof and leakage plugging and structural repair of the leakage defects of concrete structures are achieved.

The invention discloses a tailing recycling and harmless treatment method, and the method comprises the following steps: putting tailings, a sodium-containing alkaline compound and a water medium intoa sealed reaction kettle for hydrothermal reaction, performing solid-liquid separation on the hydrothermal reaction product, concentrating the obtained liquid phase to obtain a sodium silicate product, and performing high-temperature treatment on the obtained solid phase to stabilize heavy metals. The method not only realizes efficient recovery of silicon resources in the tailings, but also realizes stabilization treatment of heavy metals in the tailings, and can be popularized and applied on a large scale.

The invention discloses a synergetic resource processing method of waste fly ashes and metallurgical dust. The synergetic resource processing method of the waste fly ashes and the metallurgical dust comprises the following steps that after the waste fly ashes, the metallurgical dust and solid fuel mixed materials are prilled or briquetted, drying and high-temperate roasting are conducted, smoke dust containing K, Na, Pb and Zn is recovered from smoke, and slag materials are iron-contained furnace materials. By means of the synergetic resource processing method of the waste fly ashes and the metallurgical dust, the qualified iron-contained furnace materials with harmful element content being below 0.05% can be obtained and can be directly used as ironmaking raw materials, the smoke dust which is rich in valuable metals such as K, Na, Pb and Zn is recovered, self-contained dioxin of the fly ashes is degraded, and the purpose of synergetic resource of the waste fly ashes and the metallurgical dust is achieved.

The invention belongs to the technical field of dust pollution control, and discloses an environment-friendly biomass dust suppressant and a preparation method thereof. The dust suppressant is composed of carboxymethyl starch, carboxymethyl cellulose, sodium alginate, anhydrous Calcium chloride, rhamnolipids, sophorolipids and water. The dust suppressant of the present invention is low in cost, environmentally friendly, non-toxic and harmless, easy to biodegrade, has good biocompatibility with plants in the spraying area and the soil environment, and can be used in dust control work together with green plants to realize chemical dust suppression Comprehensive application with plant dust retention. When the dust suppressant solution is sprayed on the dust surface, it can form a continuous and certain-strength consolidation layer on the surface, which has good wind erosion and rain resistance performance, can withstand extreme temperature environment for a long time, and has certain moisture retention , which has a better effect of dust suppression and damage prevention.

The invention relates to a manual hole digging pile high polymer grouting protection structure and a construction method thereof. The manual hole digging pile high polymer grouting protection structure is characterized in that a pile hole wall is set to be a waterproof supporting ring formed by high polymer grouting; a pressure grouting ring is arranged on the top of the waterproof supporting ring, and strengthening columns formed through high polymer grouting are distributed on the periphery of the waterproof supporting ring; in a bottom overbreak section of a pile hole, a lime strengthening layer is formed through lime pavement, and graded broken stones are laid on the lime strengthening layer to form a broken stone waterproof layer; and pressure grouting plates are fixedly arranged on the top face of the broken stone waterproof layer, a high polymer grouting solution is injected through bottom grouting holes formed in the pressure grouting plates and seeps into gaps of the graded broken stones, and a waterproof bottom plate is formed through expansion curing. The waterproofing and wall protecting work during construction is carried out in advance, bottom and side wall waterproofing and periphery supporting strengthening are combined, the technology is simple, and the project cost is low. The hole digging pile underground work conditions are improved, the later pile construction quality and progress are guaranteed, and obvious economic benefits and high popularization value are achieved.

The invention discloses a grouting device and method of external sealing and back pressure for concrete water seepage treatment. The grouting device comprises external sealing steel plates, pressure air nozzles, grouting nozzles, elastic sealing strips, a pressing and pasting fastener and a pressing and sealing fastener. According to the grouting device, when concrete water seepage treatment is conducted, one or more external sealing steel plates pasted with the elastic sealing strips at periphery are sealed on the concrete water seepage surface by adopting expansion bolts, back pressure grouting treatment of concrete water seepage appearance after full sealing can be achieved, a fast-setting and early-strength expoxy grout with good permeability is adopted by grouting, the pressure air nozzles and the grouting nozzles are arranged on the external sealing steel plates, a mixed grouting technology of pressure air and pressure grouting is carried out, the concrete water seepage can be effectively filled, permeated and consolidated from outside to inside, and the double effects of waterproof and leakage plugging and structural repair of the leakage defects of concrete structures are achieved.