259 results about "Pervious concrete" patented technology

The invention discloses high-strength durable pervious concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is prepared from the following raw materials in parts by weight: 160 to 220 parts of cement, 1200 to 1600 parts of coarse aggregate, 170 to 230 parts of fine sand, 160 to 200 parts of water, 3 to 4.5 parts of polycarboxylate superplasticizer, 5 to 15 parts of silica fume, 1 to 3 parts of polypropylene fiber, 8 to 12 parts of modified nano cellulose and 5 to 7 parts of flexibilizer, wherein the flexibilizer comprises modified graphene oxide, propylene glycol monomethyl ether and polyisoprene rubber. The interface compatibility is enhanced through the modified nanocellulose, microcracks are reduced, the bonding strength of aggregate and cement is improved, and the compressive strength is improved; the toughening agent component endows the concrete with toughness and durability, the toughening agent component and the toughening agent component have a synergistic effect, and the concrete prepared by mixing the various raw materials has excellent mechanical properties and durability on the basis of good water permeability, and has a wide market application prospect.

The invention discloses a sponge city seepage and drainage structure and a sponge city water circulation system, and relates to the technical field of sponge city construction. A capillary air flotation grading pretreatment unit, a rhizosphere electro-catalysis layer and a mineral conversion filler layer are sequentially arranged below the permeable pavement layer in the rainwater permeation direction, and the drainage layer is a piezoelectric drainage layer; according to the method, blockages are subjected to capillary air flotation classification, minerals are converted into purification carriers, solid waste outward transportation is avoided, and heavy metal pollution is prevented; the water circulation end depends on photovoltaics, an external power grid is not needed, and carbon is reduced; sensor linkage adapts to a purification mode of high / low-pollution rainwater, and a straw self-cleaning function at the seepage and drainage end is prevented from being interrupted; the magnetic sensitive medium is prepared by converting blockages, outsourcing is avoided, and the cost is reduced; the ultrafine particles in the by-products assist in purification, the uleucite is used for preparing the pervious concrete, and the zeolite is used for improving the soil, so that environmental protection and resource regeneration are realized.

The invention discloses cold bonding ceramsite and a preparation method and application thereof in pervious concrete.The cold bonding ceramsite is prepared from, by mass, 70-120 parts of solid waste base material, 5-8 parts of activating agent and 5-10 parts of binder, and the solid waste base material is prepared from dredged sludge, fly ash and waste concrete powder. The cold-bonded ceramsite is prepared from the solid waste base material under the conditions of microwave radiation, multi-element activation, granulation and staged maintenance, a high-temperature calcination process is not involved, the solid waste base material is fully utilized, the energy consumption of ceramsite preparation is reduced, solid waste resourceful treatment is realized, the land pressure of landfill is relieved, and the consumption of non-renewable resources is reduced. The prepared cold-bonded ceramsite is applied to the preparation process of the pervious concrete, the obtained pervious concrete has high strength, freeze-thaw resistance and salt corrosion resistance, and the comprehensive performance is remarkably improved.

The invention relates to the technical field of road engineering material design and calculation, and discloses a calculation method for pervious concrete double-layer grating arrangement parameters. According to the method, a geogrid working performance coefficient, a grid interlayer spacing optimization factor, an effective permeability rate correction coefficient, an interlayer synergistic effect coefficient, a layered stress diffusion factor and a permeability comprehensive index are introduced for the first time, a quantitative evaluation model is constructed, and a multi-dimensional performance index and a structure response function are constructed. The structural mechanical behavior and permeability of the pervious concrete are comprehensively considered, and the double-layer arrangement position and interlayer spacing of the geogrid are determined. The blindness of traditional empirical layout is overcome, and the method is suitable for road structure design under medium and heavy traffic loads. According to the method, a scientific and computable double-layer arrangement parameter determination method is established, and collaborative optimization of the grid enhancement effect and the water permeability performance is achieved.

The application relates to the technical field of slope engineering prevention, in particular to an expansive soil ecological supporting structure based on recycled water permeable concrete and a construction method, which comprises a waterproof film coating layer, a recycled water permeable concrete layer, a backfill soil layer, a retaining board and a bottom EPS foam board, the waterproof film coating layer is formed by uniformly spraying waterproof film coating on a slope surface, the recycled water permeable concrete is sawtooth-shaped and is poured on the waterproof film coating layer, the backfill soil is covered on the recycled water permeable concrete layer, the retaining board is arranged at the bottom of the expansive soil slope, and the bottom EPS foam board is arranged between the retaining board and the expansive soil slope. Based on the concept of a sponge city, the application forms a slope water storage structure by using the recycled water permeable concrete and the waterproof film coating layer, achieves the effect of 'flood drainage and drought replenishment', reuses engineering slag soil and waste degradable materials, achieves the purpose of low carbon, simultaneously utilizes the anchoring effect of the vegetation root system, and realizes long-term green and low-carbon protection of the expansive soil slope.

The present invention describes a multi-component inorganic capsule anchoring system for chemically fastening anchors and post-installed reinforcements in a mineral matrix, comprising a curable powdered aluminum cement component A and an initiator component B for initiating a curing process in an aqueous phase, wherein the powdered aluminum cement component A is an aluminum cement component based on powdered calcium aluminate cement, and wherein component B comprises an accelerator component and water. Furthermore, the invention relates to a method for chemically fastening anchoring members, preferably metal anchors and post-installation reinforcements, in a mineral matrix, such as a structure made of bricks, concrete, pervious concrete or natural stone.

This invention provides a perimeter structure and construction method for road manhole covers. The perimeter structure includes a base reinforcement section, formed by pouring a first layer of concrete into the excavated surface of the roadbed, with multiple layers of steel mesh installed within the base reinforcement section; a permeable load-bearing section, formed by pouring permeable concrete above the base reinforcement section, with a drainage channel; a drainage pipe connected to the drainage channel, used for connecting to a drainage system; and an anchor, the lower end of which is connected to the multiple layers of steel mesh, and the upper end passing through the permeable load-bearing section and connecting to the manhole ring, used for installing the manhole cover. This invention provides a construction method for the perimeter structure of road manhole covers, constructing multiple layers of steel mesh, anchors, and drainage pipes in the excavated surface of the roadbed, and forming a composite load-bearing structure through pouring, used for installing the manhole ring and manhole cover. The beneficial effects of this invention are: reducing the risk of manhole ring settlement, increasing the drainage speed of water accumulation around the manhole, and reducing rainwater erosion of the roadbed.

This invention discloses a shock-absorbing and pressure-reducing permeable concrete pile reinforced with recycled tires and its construction process. The pile structure comprises a pile body formed by vertically connecting several precast permeable concrete columns; compressible rubber blocks containing permeable holes and ball joints are fixed between adjacent permeable concrete columns; a layer of non-woven fabric is wrapped around the permeable concrete pile to prevent soil from clogging the concrete holes; and a ring-shaped mesh skeleton structure made of recycled tire strips is used to wrap and fix the non-woven fabric around the pile. This invention, by comprehensively utilizing the permeable concrete columns, the ring-shaped mesh skeleton structure, and the compressible rubber blocks containing permeable holes and ball joints, can achieve pile stability under small seismic loads, prevent pile breakage under large seismic loads, and allow the pile to quickly return to its original position after the seismic load disappears, thus ensuring a comprehensive application effect of "unmoved by small earthquakes, unyielding in large earthquakes, and self-repairing after earthquakes."

The invention relates to the technical field of pavement structures, in particular to a high-bearing-capacity permeable pavement structure based on ecological concrete.The high-bearing-capacity permeable pavement structure comprises a surface ecological permeable concrete layer, a high-bearing-capacity supporting framework layer and a stable base layer, a mounting groove is formed in one side of the top end face of the surface ecological permeable concrete layer, and a first connecting hole is formed in the side wall of the mounting groove through a drainage hole; a mounting hole is formed in one side of the top end face of the surface ecological water-permeable concrete layer, and the lower side of the mounting hole communicates with a second connecting hole. According to the ecological water-permeable system, the surface ecological water-permeable concrete layer, the high-bearing supporting framework layer and the multi-stage filtering drainage structure are introduced into a traditional water-permeable system, and cooperative improvement of the bearing performance and the water-permeable performance is achieved; according to the structure, high strength and stability are guaranteed, meanwhile, rainwater is purified step by step through the coarse filter layer, the medium filter layer, the fine filter layer and filter cotton arranged in the filter box, pores are effectively prevented from being blocked, and long-term water permeability is maintained.

The present application relates to a kind of cellulose modified water purification type pervious concrete and preparation method, comprising: microcrystalline cellulose modification, with diabase as aggregate, with cement, fly ash, modified microcrystalline cellulose and water are mixed, forming, demolding, it is obtained.The present application, modified microcrystalline cellulose and fly ash form synergistic effect, the cement paste of pervious concrete is improved, and water retention can inhibit the phenomenon of slurry bleeding hole appears, and the structure performance of pervious concrete skeleton and paste is stable.Pervious concrete compressive strength, flexural strength increases, and because slurry bleeding hole phenomenon reduces, the water permeability of pervious concrete increases.Modified microcrystalline cellulose makes the purification capacity of pervious concrete further improve, and C-S-H gel in modified pervious concrete cement paste and modified microcrystalline cellulose ligand are coordinated to realize the adsorption of Cu (II), Cr (III), Zn (II), Pb (II) ion in water.Modified microcrystalline cellulose makes cement paste early hydration process slow down, and it is beneficial to reduce the generation of early surface crack of pervious concrete paste.

The invention discloses pervious concrete and a strength prediction and design method thereof, and belongs to the technical field of building materials. The invention discloses a pervious concrete strength prediction and design method. The method comprises the following steps: S1, designing nonporous concrete reference strength according to a water-binder ratio, a cementing material and an additive; s2, constructing a bilinear strength prediction model, and dividing the relation between the strength and the porosity of the pervious concrete into two sections of linear intervals for fitting; and S3, determining the strength of the pervious concrete by using the bilinear strength prediction model in combination with the target porosity. The 28-day compressive strength of pervious concrete and imperforate concrete under the condition of the same water-binder ratio is compared and analyzed, a segmented linear relation model between the strength coefficient fc / fc0 and the porosity p is provided, the slurry wrapping thickness is controlled by combining the aggregate stacking density, the slurry rate and the slurry yield stress, and therefore designable and controllable forming of the pervious concrete is achieved. The problems that in existing pervious concrete design, the strength is difficult to predict, the porosity is difficult to accurately control, and the slurry wrapping thickness cannot be quantified are solved.

The utility model provides a terrace structure. The terrace structure comprises a sand-based permeable surface layer and a concrete permeable inner layer, the sand-based permeable surface layer is arranged above the concrete permeable inner layer; the thickness of the sand-based water-permeable surface layer is smaller than that of the concrete water-permeable inner layer; the breaking strength of the sand-based water-permeable surface layer is greater than that of the concrete water-permeable inner layer. According to the utility model, the sand-based permeable surface layer and the concrete permeable inner layer jointly form a terrace structure, so that rainwater can infiltrate downwards through a pavement structure and is retained and stored in the high-strength light permeable concrete, and sponge pavement really has a'storage 'function; in addition, the stored rainwater is evaporated into the air in sunny days, and the good effect of relieving the urban heat island effect is achieved.

The utility model discloses a pervious concrete permeability performance testing device which comprises a water storage tank, an upper fixing seat and a lower fixing seat which are sequentially connected from top to bottom, and the centers of the water storage tank, the upper fixing seat and the lower fixing seat are located on the same straight line; the upper fixing base and the lower fixing base are connected through a telescopic mechanism, and a containing groove used for containing the pervious concrete mold is formed between the upper fixing base and the lower fixing base; the side wall of the upper fixing seat is communicated with a first pressure measuring pipe, the side wall of the lower fixing seat is respectively communicated with a second pressure measuring pipe and a drainage port, and the drainage port is connected with a drainage valve. By arranging the telescopic mechanism, pervious concrete molds with different heights can conveniently enter the placing groove from the side face so as to carry out the water permeability performance test, and meanwhile, the water permeability performance parameters of pervious concrete can be rapidly measured through visual reading of the pressure measuring pipe.

A kind of sponge city pervious concrete hidden rainwater well lid and construction method, hidden rainwater well lid, including well seat, well seat is equipped with hidden well ring, upper well lid is installed on hidden well ring, recess is formed in the center of hidden well ring, shunt block is installed in the center position of recess, partition plate is installed on the upper surface of hidden well ring, partition plate is distributed in spiral shape, flow channel is arranged between adjacent partition plates, liquid diode is uniformly arranged on the surface of flow channel;Metal mesh, rotary motor are installed on the lower surface of hidden well ring, rotary motor is connected with multiple cleaning arms, through the structure of hidden well ring, shunt block, partition plate and flow channel, water droplets gradually gather to form water flow in flow channel under the action of gravity and fluid diode, flushing is carried out along flow channel, effective collection and shunting of rainwater are realized.Meanwhile, the application of fluid diode enables water flow to flow spontaneously along a specific direction, effectively avoids sand accumulation, and reduces maintenance cost.

This invention discloses a modified fiber-reinforced composite high-permeability concrete and its preparation method in the field of concrete technology. The concrete comprises the following components: silicate cement, fly ash, coarse aggregate, composite fiber, waterborne polyurethane emulsion, activated biochar, water-reducing agent, composite bacterial solution, photocatalyst, and water. By adding modified polypropylene fiber, modified carbon fiber, waterborne polyurethane emulsion, and activated biochar to the concrete raw materials, this invention enhances the mechanical properties of the concrete, improving its stability, compressive strength, and crack resistance. It also increases the void structure of the concrete, further improving its permeability. Simultaneously, the addition of microbial solution and photocatalyst enhances the self-healing and self-cleaning capabilities of the concrete.

The invention discloses high-performance pervious concrete and a preparation method thereof, and belongs to the technical field of civil engineering materials. Based on 100 parts of P.O42.5 cement, the cement comprises the following components in parts by weight: 520-640 parts of gravel, 60-70 parts of sand, 4-5 parts of siliceous active enhancer and 30-40 parts of water. Preferably, the particle size of the gravel is 10-20 mm, and the particle size of the sand is 0 The preparation method comprises the following steps: dry-mixing the cement, the sand and the gravel, adding the water and the reinforcing agent, stirring, inserting and tamping layer by layer, compacting and curing. The obtained concrete has high permeability coefficient and high compressive strength, is low in cement consumption, and is suitable for sidewalks of sponge cities, residential roads and parking lots.

The present invention discloses a kind of permeable concrete brick of load metal organic framework material and its preparation method, the method comprises the following steps: a silicon aluminum material is mixed with an alkali activator to prepare a geopolymer slurry, an organic amine reagent is added, and the modified geopolymer slurry is obtained by stirring evenly after mixing; an aggregate is added to the modified geopolymer slurry, and after stirring evenly, it is loaded into a test mold, and demoulding is obtained after standing for 1 2d to obtain a geopolymer permeable concrete brick, a metal salt solution is evenly sprayed on the geopolymer permeable concrete brick, and steam curing is performed for 3 5h before taking it out; an organic ligand solution is evenly sprayed on the geopolymer permeable concrete brick after curing, and then steam curing is performed for 18 22h. After curing is completed, it is taken out and dried in an oven at 80 120 ℃ for 20 30h to obtain a permeable concrete brick of load metal organic framework material. The permeable concrete brick prepared by the present invention has good adsorption efficiency and can give play to excellent water purification function in actual application.

The utility model relates to the technical field of water-permeable terraces, in particular to an ecological water-permeable concrete terrace which comprises a plain soil layer, a water-permeable concrete layer is laid on the top face of the plain soil layer, a water-permeable pavement layer is laid on the top face of the water-permeable concrete layer, a drainage ditch is arranged on the left side of the plain soil layer, and a well lid is laid on the top face of the drainage ditch. A water drainage structure is installed in the pervious concrete layer and comprises a water drainage pipe, the water drainage pipe is laid on the inner side of the pervious concrete layer, a movable cavity is formed in the bottom end of the water drainage pipe, a water drainage opening is formed in the bottom face of the water drainage pipe, and a cylindrical groove is formed in the left end of the movable cavity; a connecting cylinder is integrally formed at the bottom of the left end of the drainage pipe. By arranging the movable water baffle, the position between the through hole and the water outlet can be adjusted during moving, so that the functionality of the water drainage pipe is improved, the rainwater guiding effect of the water drainage pipe is guaranteed, and rainwater waste is reduced.

The utility model belongs to the technical field of pervious concrete pavement construction, and discloses a pervious concrete pavement construction joint plugging device which comprises a movable frame, the top face of the movable frame is fixedly connected with a glue barrel, the bottom end of the glue barrel is fixedly connected with a conveying pipe, and the conveying pipe is fixedly connected with the movable frame through a through hole formed in the movable frame. A stirring assembly is arranged in the glue barrel, a fixed frame is fixedly connected to the top surface of the movable frame, a first rotating rod is rotationally connected to the fixed frame through a through hole formed in one side of the fixed frame, a first bevel gear is fixedly connected to one end of the first rotating rod, and a first belt wheel is fixedly connected to the other end of the first rotating rod; the dust removal device has the advantages that the situation that a large amount of dust is contained in a construction joint, blocking glue is combined with the dust when the construction joint is filled with the blocking glue, and the blocking effect of the blocking glue is affected can be avoided.

The invention relates to the technical field of roadway construction, in particular to a pervious concrete rain drainage facility combined construction device and method. According to the technical scheme, the device comprises a driving machine and a road roller at the front end of the driving machine, wherein a trench excavation machine and a hopper are detachably mounted at the rear end of the driving machine; an auger blade and a stirring shaft are arranged in the hopper, and an adjustable moving mechanism and a flattening mechanism are installed at the bottom of the hopper through a bottom frame. The auger blade drives the feeding pipe and the blanking spray head to swing back and forth through bevel gear transmission and a bidirectional screw rod to uniformly distribute materials; the flattening mechanism is provided with a pressing roller with an eccentric wheel, and vibration compaction can be achieved. The method comprises the steps of foundation soil compaction, blind ditch construction, gravel subbase layer laying, pervious concrete base layer vibration compaction, maintenance and pervious surface layer laying. Multiple permeable structure layers are laid through one machine, material distribution is uniform, compaction is controllable, the permeable porosity is effectively kept, and the rainwater collection efficiency and the construction quality are improved.

The application belongs to the technical field of road engineering construction, and discloses a water-permeable road construction method, which comprises the following steps: S1, calculating the road bearing capacity, the water-permeable rate, and the aperture and opening interval of the water-permeable hole; S2, laying a road base and compacting it; S3, laying a water-permeable hole mold on the road base according to the opening interval; S4, pouring concrete to form a concrete roadbed and performing roughening treatment on the surface of the concrete roadbed; S5, preparing water-permeable concrete according to the water-permeable rate, pouring and filling the water-permeable concrete into each water-permeable hole on the concrete roadbed, and forming a water-permeable concrete layer on the concrete roadbed; and S6, laying a water-permeable asphalt layer. The construction method increases the water-permeable hole in the ordinary concrete roadbed, pours water-permeable concrete, combines the ordinary concrete roadbed with the water-permeable concrete, improves the water-permeable physical properties of the roadbed and increases the structural strength, thereby increasing the bearing capacity and water-permeable rate of the road.

The invention relates to a detection structure for pervious concrete. The detection structure comprises a case, a water measuring cylinder and a clamping mechanism, the top of the case is of an open structure and is fixedly provided with a bracket; the bottom of the water measuring cylinder is communicated with a drain pipe, the drain pipe is provided with a first switch valve and located over the open structure, and the water measuring cylinder is fixedly arranged on the support; the clamping mechanism is fixedly arranged on the open structure and comprises two half pipe bodies, and the two half pipe bodies can clamp the pervious concrete. A pervious concrete sample is clamped right below the drainage pipe through the clamping mechanism, a certain amount of water is placed in the water measuring cylinder, the first switch valve is driven to be opened, the drainage pipe starts to drain water, the water is poured on the pervious concrete sample, and an observer observes the pervious concrete sample. Through the structural arrangement, the situation that an operator needs to have certain skills and experience when the cylinder is manually held by hand for testing, otherwise, the accuracy and repeatability of testing are difficult to guarantee is avoided.

The application relates to the technical field of building materials, in particular to a pervious concrete and a preparation method thereof. The pervious concrete is prepared from raw materials including the following components in parts by weight: water 100-125 parts, cement 270-300 parts, coarse aggregate 1300-1500 parts, water reducing agent 8-15 parts, single-end hydroxyl silicone oil 15-40 parts, tannic acid 25-50 parts and amphiphilic cellulose 50-80 parts. The pervious concrete prepared by the application has good compressive strength and freeze-thaw resistance.

The pavement structure suitable for the flood detention area comprises a building aggregate roadbed, a gravel leveling layer, a graded gravel hardcore, a pervious concrete base layer, an isolating layer and an assembly type prestressed concrete pavement slab layer which are sequentially arranged from bottom to top, the structure is characterized in that the building aggregate roadbed, the broken stone leveling layer, the graded broken stone hardcore and the pervious concrete base layer are all made of water-resistant materials; the fabricated prestressed concrete panel layer is formed by paving continuously paved pre-tensioned pavement panels, and the adjacent pre-tensioned pavement panels are connected through self-stress seams. According to the pavement structure suitable for the flood detention area, the waterproof material is adopted, the mechanical property of each layer is basically not changed when the pavement structure is immersed in water, the strength is not reduced, water in each layer of a road can quickly flow out after the water level is reduced, and the road is not influenced in the later period; and the flood cannot pass through the crack to corrode the steel strand, so that the whole road is large in bearing capacity and high in durability.

The invention belongs to the technical field of building materials, and particularly relates to design and a preparation method of full-replacement recycled aggregate pervious concrete. The method specifically comprises the steps of aggregate crushing and screening, fractal grading design calculation, coarse aggregate compounding, pervious concrete preparation and the like. According to the method, the pervious concrete is prepared by completely replacing natural aggregate with the recycled aggregate, and the optimal fractal gradation of the full-substitution recycled aggregate is finally determined by analyzing the influence of different fractal gradation of the full-substitution recycled aggregate pervious concrete on the mechanical property and the permeability coefficient of the full-substitution recycled aggregate pervious concrete. The prepared full-substitution recycled aggregate pervious concrete has excellent mechanical strength and water permeability. The method is simple in process and controllable in cost, high-value utilization of the recycled aggregate conforms to the concept of green building materials, and the method can be widely applied to preparation of the recycled aggregate pervious concrete and has remarkable environmental protection value and application prospects.

The application relates to the field of concrete, and discloses an ecological water-permeable concrete and a preparation method thereof. The ecological water-permeable concrete is prepared from the following raw materials in parts by mass: cement 68-85 parts; modified recycled coarse aggregate 150-200 parts; natural coarse aggregate 260-320 parts; waste tire rubber particles 4-8 parts; water 25-32 parts; water reducing agent 1-3 parts; and cellulose ether 0.5-1 part. The water-permeable concrete prepared by the application has excellent compressive strength and frost resistance, and is suitable for a sidewalk with a parking lot under a human load or a region with cold winters and large temperature differences.

The invention discloses a low-carbon pervious concrete preparation process based on modified recycled aggregate, and relates to the technical field of building materials, and the preparation process specifically comprises the following steps: pretreating the recycled aggregate by using a pretreatment device, removing surface impurities, sequentially carrying out surface strengthening treatment and spray activation treatment on the recycled aggregate after impurity removal, and drying; quantifying the materials; uniformly dry-mixing the materials, gradually adding water, and carrying out wet mixing until the slurry wraps the aggregate to form a continuous film and the slump reaches the standard; and the mixed concrete is poured into a prefabricated mold, vibrated to be compact and cured to the specified strength. Through step-by-step strengthening and spray activation operation, a recycled aggregate modification process is optimized, the recycled aggregate modification cost is reduced, and the charcoal micro powder is introduced, so that the concrete is endowed with an environment purification function on the basis of improving the durability of the concrete, and the application field of the concrete is widened.

The utility model relates to the technical field of permeable pavements, and discloses a permeable concrete road structure based on recycled aggregate, which comprises a base layer, the bottom of the base layer is fixedly connected with a permeable layer, the top of the permeable layer is provided with a plurality of first permeable holes, the bottom of the permeable layer is fixedly connected with a bottom layer, and the bottom layer is provided with a plurality of second permeable holes. A plurality of second permeable holes are formed in the top of the bottom layer, a plurality of drainage holes are formed in the front side and the rear side of the bottom layer, drainage pipes are fixedly connected to the front side and the rear side of the bottom layer, two threaded holes are formed in each of the front side and the rear side of the bottom layer, and bolts are in threaded connection to the left sides and the right sides of the interiors of the two drainage pipes. According to the utility model, the base layer is made of the mixed material of the gravel and the cement, rainwater permeates through the first water permeable holes in the top of the water permeable layer to ensure water permeability and enough strength, then the water permeates into the bottom layer and flows into the water drainage pipe through the second water permeable holes and the water drainage holes to quickly drain the rainwater, so that the water permeability is ensured, and the problem of urban waterlogging is relieved.

The present application relates to the technical field of concrete pile forming, and particularly discloses an in-situ prefabricated mold for a water-permeable concrete pile and a pile forming method.The in-situ prefabricated mold for the water-permeable concrete pile comprises a drill hole inner support assembly, the drill hole inner support assembly comprises an elastic screw rod, the elastic screw rod is provided with a water-permeable cloth, a limiting tube is arranged in the elastic screw rod, four clamping holes are formed in the bottom end of the limiting tube, a plurality of limiting ropes are arranged on the elastic screw rod, and the middle portions of the limiting ropes are connected with a connecting rope.The in-situ prefabricated mold for the water-permeable concrete pile has a complete spiral contour of the water-permeable concrete pile, improves the bearing capacity of the pile body and the control ability of the soil layer deformation, reduces the number of piles by improving the quality of a single water-permeable concrete pile, thereby reducing the energy consumption of operation machinery and carbon emission.The pile forming method for the water-permeable concrete pile solves the problems of hole collapse and diameter reduction, and reduces the pile forming defect rate.

The utility model belongs to the field of municipal engineering, and particularly relates to a water permeable pipe for paving water permeable bricks, which comprises an upper pipe and a lower pipe, the total length of the upper pipe and the lower pipe is larger than the thickness of mortar virtual paving, sawteeth A are symmetrically arranged on two sides of the outer wall of the lower portion of the upper pipe, a sliding groove is arranged in the upper pipe corresponding to the sawteeth A, and the sawteeth A can be contracted into the sliding groove. Sawteeth B which can be clamped with the sawteeth A in a matched mode are symmetrically arranged on the two sides of the inner wall of the upper portion of the lower pipe, and the sawteeth A can move downwards relative to the sawteeth B. According to the permeable pipe, water permeated by the permeable bricks can flow into the permeable concrete base layer, the overall water permeability of the sidewalk road is greatly improved, the permeable pipe can change according to the thickness of mortar and the laying process, cannot be submerged by the mortar to lose the effect, cannot be higher than the mortar to cause unevenness of the permeable bricks, and it is guaranteed that the permeable bricks are laid firmly.