Combined construction process of pre-assembling integrated driving and splicing and separable driving of secondary cell of cellular steel sheet pile large cylinder

The invention discloses a combined construction process of construction process of pre-assembling integrated driving and splicing and separable driving of a secondary cell of a cellular steel sheet pile large cylinder. The process comprises the following steps: transporting a pre-assembled lower secondary grid sheet pile section to a construction site through a transport ship; directly distributing a plurality of vibration hammers to the transport ship for vibration sinking to lift the pre-assembled lower secondary grid sheet pile section from the transport ship and insert into a locking port of a connecting pile of a main cell and a secondary cell; starting the vibration hammers at the same time; performing vibration sinking for a secondary cell steel sheet pile; carrying out integrated vibration sinking; splicing the pile at site after integrated driving; assembling an upper secondary cell steel sheet pile section; then operating single hammer by groups and layers to perform vibration ...

Concrete synergist and preparation method thereof

The invention discloses concrete synergist and a preparation method thereof. The concrete synergist comprises, by weight, 10-30 parts of alcamines substances, 8-18 parts of organic alcohol, 5-15 parts of methacrylic acid copolymers, 4-12 parts of alkaline inorganic salt, 0.1-2 parts of hydroxyl silicones, 0.5-4 parts of tripolyphosphate and 35-60 parts of water, and the methacrylic acid copolymers refer to one or two copolymers among methacrylic acid-hydroxyethyl acrylate copolymer co-MAA-HEA of which the molecular weight is 50000-6000 and the block proportion MAA: HEA is (3-4): 1, methacrylic acid-hydroxy-propyl acrylate copolymer co-MAA-HPA of which the molecular weight is 40000-50000 and the block proportion MAA: HPA is (4-5): 1 and methacrylic acid-ethyl acrylate co-MAA-EA of which the molecular weight is 30000-40000 and the block proportion MAA: EA is (4-6): 1. The concrete synergist is free from strong odor and toxicity, high in efficiency and environmental friendly.

Device and method for hydrolyzing plant hemicellulose by fermented citric acid wastewater

The invention relates to a device capable of effectively utilizing fermented citric acid wastewater to hydrolyze plant hemicellulose. The device is mainly composed of a circulating spray flushing and filtering reactor, an acid storage tank, a water storage tank and a heat exchanger; the method is characterized by comprising the steps: at first, mixing the citric acid wastewater with raw material of the plant hemicellulose for hydrolysis reaction at 100 to 200 DEG C to obtain hydrolyzate mainly containing pentose, and then adding cellulase into hydrolyzed residues for batch enzyme hydrolysis to obtain high-concentration dextrose for the fermentation of ethanol. The method for preparing fermentable sugar for ethanol by pretreating the raw material of the plant hemicellulose by using the fermented citric acid wastewater can not only sufficiently utilize the fermented citric acid wastewater to save water resource, but can also lower the cost for treating wastewater from fermented citric factory ...

Construction method for hollow square sloping breakwater

The invention relates to a construction method for hollow-block mound breakwater. At first, according to layered placing principle that hollow blocks between layers are set in plum shape and they are set in plum shape in 3-D space finally, aiming to different breakwater segments models are set. Then the group with good anastomosis of section contour line and optimal porosity is selected and designed so that under the condition that elevation of bottom face of section is appointed space of rows and columns is confirmed; namely parameters of indoor placing experiment with different breakwater height are confirmed as control parameters in field placing construction. They are inputted into computer. And then position sensor is set on the placing lifting machine to measure the practical position of hollow block under the water and measured data is transmitted into the computer. Parameters of practical positions of hollow block are compared with parameters of indoor placing experiment and builders ...

Suspension conveying submergence method of sluice bottom board

Construction method of large-scale steel float tank on soft soil foundation

The invention provides a construction method of a large steel buoyant box on a soft soil foundation, comprising the following steps: 1) the construction of external lock head underwater foundation pile and foundation bed is finished; 2) the steel buoyant box is hauled to a construction site by a tug boat and treated with weight balancing and leveling; 3) the steel buoyant box is injected with water for sinking so as to carry out the bedding of the steel buoyant box; and 4) slip casting fixing is carried out to the foundation bed below the bottom surface of the steel buoyant box; half the number of the precise measurement of the bulb pile top elevations are selected for providing reliable data for the making and installation of concrete cushion blocks; each cushion block is correspondinglyinstalled so as to ensure that the elevation is in the same plane, and the repeated measurement error of the top elevation after the installation of the cushion block is less than 2.5m, thus meeting the ...

Method for controlling influence of engineering piling to surrounding environment

Multifunctional tooling bracket for assembling and disassembling main lattice cylinder positions of large cylinders of lattice steel sheet piles

The invention discloses a multifunctional tooling bracket for assembling and disassembling main lattice cylinder positions of large cylinders of lattice steel sheet piles. The multifunctional tooling bracket comprises a base support pile, an upper support base bracket fixedly arranged on the base support pile and is used for supporting four groups of 1/4 circle-shaped steel sheet pile preassembling pieces and assembling the large cylinders of the lattice steel sheet piles, a lifting device arranged on the upper support base bracket and used for driving the 1/4 circle-shaped steel sheet pile preassembling pieces to lift on the upper support base bracket, a rotation device arranged on the upper support base bracket and used for driving the 1/4 circle-shaped steel sheet pile preassembling pieces to rotate on the upper support base bracket, and an airbag expanding device arranged on the upper support base bracket and used for compensating a preserved gap between the tooling bracket and the ...

Inclined pushing mechanism for forming flanging

The utility model discloses an inclined pushing mechanism for forming a flanging, which is obliquely arranged on a vertical plane and comprises a first sliding block driven by a driving mechanism, a second sliding block and a third sliding block, the second sliding block abuts against the first sliding block through a first inclined plane and is arranged on the first sliding rail, and the second sliding block can slide back to the first sliding block along the first sliding rail under the action of the first sliding block; the third sliding block abuts against the second sliding block through a second inclined plane and is arranged on the second sliding rail, a flanging block used for forming a flanging is arranged on the third sliding block, and the third sliding block can drive the flanging block to slide back to the second sliding block along the second sliding rail under the action of the second sliding block; the second sliding rail is obliquely arranged and is perpendicular to the ...

Polycarboxylic acid water reducer and preparation method thereof

The invention discloses a polycarboxylic acid water reducer and a preparation method thereof. Raw materials of the polycarboxylic acid water reducer comprise the following components in parts by weight: 160-170 parts of an ether-based monomer having a molecular weight of 600-3000, 1-4 parts of an unsaturated phosphorous-containing monomer, 1-3 parts of an unsaturated silicon-containing monomer, 15-25 parts of acrylic acid, 1-2 parts of an oxidant, 2-2.5 parts of sodium hypophosphite, 0.3-1.0 part of promoter and 250 parts of water. Since unsaturated phosphorous-containing and silicon-containing monomers are added into the raw materials of the polycarboxylic acid water reducer, a plurality of phosphorous-containing and silicon-containing groups are introduced into molecular chains of the water reducer, so that the polycarboxylic acid water reducer having the advantages of high water-reducing rate, good slump-retaining property and facilitation in development of early strength of concrete ...

Demoulding agent used for precast concrete component and preparation method thereof

The invention discloses a demoulding agent used for precast concrete components. The demoulding agent includes following raw materials, by weight, 10-30 parts of an unsaturated fatty acid, 5-20 parts of an oily density adjusting agent and an aqueous density adjusting agent, 1-5 parts of an oily emulsifier, 1-5 parts of an aqueous emulsifier, 0.1-4 parts of an emulsification additive, 0.1-2 parts of a defoaming agent, 0.1-2 parts of an anti-rust agent, 1-5 parts of a settling-resistant and thickening thixotropic agent and 40-65 parts of water. The unsaturated fatty acid is oleinic acid, palmitoleic acid or ricinoleic acid. The emulsification additive has a structure formula represented as follows, wherein R1 is H or CH3, R2 is CONH2, CH2SO3Na or COOM, the x, the y, the a and the b are linking numbers of a copolymer repetitive unit and are ranged from 1 to 10, the m and the n are addition mole average numbers and are ranged from 10-50, wherein M is a hydrogen atom, a monovalent metal ion, ...

Device and method for hydrolyzing plant hemicellulose by fermented citric acid wastewater

The invention relates to a device capable of effectively utilizing fermented citric acid wastewater to hydrolyze plant hemicellulose. The device is mainly composed of a circulating spray flushing and filtering reactor, an acid storage tank, a water storage tank and a heat exchanger; the method is characterized by comprising the steps: at first, mixing the citric acid wastewater with raw material of the plant hemicellulose for hydrolysis reaction at 100 to 200 DEG C to obtain hydrolyzate mainly containing pentose, and then adding cellulase into hydrolyzed residues for batch enzyme hydrolysis to obtain high-concentration dextrose for the fermentation of ethanol. The method for preparing fermentable sugar for ethanol by pretreating the raw material of the plant hemicellulose by using the fermented citric acid wastewater can not only sufficiently utilize the fermented citric acid wastewater to save water resource, but can also lower the cost for treating wastewater from fermented citric factory ...

Method for 1/4 land territory preassembling and overwater dispersion of large cylinder main grids of cellular steel sheet piles

The invention discloses a method for 1/4 land territory preassembling and overwater dispersion of large cylinder main grids of cellular steel sheet piles. According to the method, for the large cylinder main grids of the cellular steel sheet piles with the diameters of 31.194m, a special crane ship is anchored on the inner side of an island wall, four 1/4 circular steel sheet pile assembling sheets are hoisted on the single side, a rotating mechanism is arranged on a supporting tool, the steel sheet pile assembling sheets on the outer side of the island wall respectively rotate to be in place, and thus integral-type assembling of the steel sheet piles of a grid body is completed. After the assembling of the steel sheet piles of the grid body is completed, vibration sink is carried out gradually in a layering mode by adopting a vibration hammer to the design elevation. The technology can complete the construction of causeways of grid steel sheet piles in the land territory formation process ...

Novel method for saccharification of ligno-cellulose

The invention relates to a new method for processing lignocellulose by saccharification, comprising dilute acid pretreatment, milling and crushing, cellulase compounding and enzymolysis saccharification process. The detail method thereof comprises the following steps: the crushed lignocellulose raw materials are pretreated with dilute acid with the H <+> concentration of 0.01mol/L-0.1mol/L and later milled and crushed, and then acidolysis sugar solution is obtained; at least two types of cellulase are mixed with xylanase for obtaining compound cellulase, and then further enzymolysis saccharification treatment is carried out to the rest solid after enzymolysis and milling for obtaining enzymolysis sugar solution. By using the process that the milling of dilute acid is combined with the one-step enzymolysis of compound enzyme, the hydrolysis sugar yield of the lignocellulose raw materials can be up to more than 90 percent. The method has the advantages of mild reaction condition, simple operation ...

Vibrating sinking method for gravel pile pipe

The invention discloses a vibration sinking method for a gravel pile pipe. The vibration sinking method comprises the following steps that firstly, the pile pipe is vibrated into a soil body through a vibration hammer on a gravel pile ship; step 2, when the bottom of the pile pipe encounters a soil body with increased compactness and the pile pipe cannot be continuously vibrated to sink to the designed elevation after the vibratory hammer reaches the maximum power of equipment, calculating the vibration mass F value which needs to be additionally increased, namely, calculating the weight of a gravel material which needs to be filled into the pile pipe in advance; thirdly, the pile pipe is filled with gravel materials with the weight corresponding to the additional vibration mass F; fourthly, the pipe pile continues to be vibrated and immersed through the vibration hammer till the pile pipe is vibrated and immersed to the designed bottom elevation; and step 5, adding the residual gravel ...

Inclined pushing mechanism for overturned edge forming

The invention discloses an inclined pushing mechanism for overturned edge forming. An overturned edge is obliquely arranged on the vertical plane. A first sliding block driven by a drive mechanism, asecond sliding block and a third sliding block are included. The second sliding block abuts against the first sliding block through a first slope and is arranged on a first sliding rail, and the second sliding block can slide back onto the first sliding block along the first sliding rail under the action of the first sliding block. The third sliding block abuts against the second sliding block through a second slope and is arranged on a second sliding rail. The third sliding block is provided with an overturned edge block for overturned edge forming, and the third sliding block can drive the overturned edge block to slide back onto the second sliding block along the second sliding rail under the action of the second sliding block. The second sliding rail is obliquely arranged and is perpendicular ...

Construction method of large-scale steel float tank on soft soil foundation

The invention provides a construction method of a large steel buoyant box on a soft soil foundation, comprising the following steps: 1) the construction of external lock head underwater foundation pile and foundation bed is finished; 2) the steel buoyant box is hauled to a construction site by a tug boat and treated with weight balancing and leveling; 3) the steel buoyant box is injected with water for sinking so as to carry out the bedding of the steel buoyant box; and 4) slip casting fixing is carried out to the foundation bed below the bottom surface of the steel buoyant box; half the number of the precise measurement of the bulb pile top elevations are selected for providing reliable data for the making and installation of concrete cushion blocks; each cushion block is correspondingly installed so as to ensure that the elevation is in the same plane, and the repeated measurement error of the top elevation after the installation of the cushion block is less than 2.5m, thus meeting the ...

Construction process of site pre-assembling and integrated driving of large cylindrical secondary cell of cellular steel sheet pile

The invention discloses a construction process of a site pre-assembling and integrated driving of a large cylindrical secondary cell of a cellular steel sheet pile. The process comprises the following steps: arranging a corresponding secondary cell assembling bracket at a construction site; directly pre-assembling the cellular steel sheet pile to form the large cylindrical secondary cell on the assembling bracket; directly distributing a plurality of vibration hammers through a floating crane for vibration sinking to hoist the assembled secondary cell from the assembling bracket and then insert into a locking port of a connecting pile of a main cell and the secondary cell at a cylinder position; starting the vibration hammers at the same time to perform vibration sinking for the secondary cell steel sheet pile; operating single hammer by groups to perform vibration sinking in place in case of insufficient overall vibration sinking. With the adoption of the process, the problems of the prior ...

Low-temperature preparation method of high-adaptability ether polycarboxylic acid water reducer

The invention discloses a low-temperature preparation method of a high-adaptability ether polycarboxylic acid water reducer, which comprises the following steps: preparing unsaturated carboxylic acid, unsaturated sulfonate, unsaturated phosphonic acid, a chain-transfer agent and water into a mixed solution A; preparing a reducer a and water into a mixed solution B; adding unsaturated polyethenoxy ether a buffering agent and water into a reaction kettle; regulating the reaction temperature to 10-40 DEG C, adding an oxidizer at one time, and dissolving by stirring; dropwisely adding the mixed solution A and mixed solution B simultaneously; after finishing drowse addition, adding 0-0.5 part of reducer b at one time, and continuing reaction for 1-2 hours; and finally, adding 10-20 parts of 30 wt% sodium hydroxide solution for neutralization, thereby obtaining the polycarboxylic acid water reducer. The method is simple, and the prepared water reducer can have high dispersibility by low doping ...

Methoxy-terminated straight-chain olefins polyether monomer for concrete water reducing agent and preparation method of methoxy-terminated straight-chain olefins polyether monomer

The invention discloses a methoxy-terminated straight-chain olefins polyether monomer for a concrete water reducing agent and a preparation method of the methoxy-terminated straight-chain olefins polyether monomer. A structural formula of the polyether monomer is CH3O-(CH2CH2O)m-(CH2)n-CR1=CH2, wherein R1 is H or CH3, m is an integer from 10 to 70, and n is an integer from 0 to 2. The preparation process of the methoxy-blocking straight-chain olefins polyether monomer is simple, and the reaction condition is mild; meanwhile, the side reaction caused in the process of performing ring opening polymerization on ethylene oxide is avoided, the industrialization is easily realized, and the application performance of the product is improved.

Pre-assembling method of 1/4 cylinder of main cell of cellular steel sheet pile in land area

The invention discloses a pre-assembling method of a 1/4 cylinder of a main cell of a cellular steel sheet pile in the land area. The method comprises the following steps: processing a steel sheet pile at a pre-assembling site in the inland; pre-assembling the 1/4 cylinder of a main cell sheet pile on a transport ship to obtain a corresponding 1/4 round steel plate pile assembling sheets. According to the scheme, the pre-assembling method overcomes the problem of the existing scheme.

Water-stop processing method of construction joint and construction screw bolt

Novel method for saccharification of ligno-cellulose

The invention relates to a new method for processing lignocellulose and obtaining sugar, which is characterized by comprising expelling-expansion pretreatment, cellulase compounding and enzymolysis saccharification, and a sugar solution collection process; at least two types of cellulase are mixed with xylanase for obtaining compound cellulase, and then added into lignocellulose raw materials undertaking expelling-expansion pretreatment, finally total sugar solution is obtained by one-step enzymolysis saccharification. By using the process that the expelling-expansion pretreatment is combined with the one-step enzymolysis of compound enzyme, the hydrolysis sugar yield of the lignocellulose raw materials can be up to more than 90 percent. The method has the advantages of simple and environmental-protection pretreatment, full use of enzyme, mild enzyme hydrolysis reaction conditions, simple operation, and high enzymolysis efficiency, produces no inhibition to the follow-up fermentation, can ...

Method for measuring material level of gravel pile in real time

The invention discloses a method for measuring the material level of a gravel pile in real time. The method is achieved through a depth measuring device comprising a driving mechanism, a depth measuring rope and a depth measuring hammer. The driving mechanism comprises a servo motor mounted on a platform of an onshore gravel pile machine or an offshore gravel pile ship, and a first fixed pulley and a second fixed pulley which are mounted at the top of the piling frame through a bracket; the sounding rope is provided with scales, and the tail part of the sounding rope is wound on a reel driven by a servo motor; and the sounding hammer is connected with the head of the sounding rope. The method comprises the following steps that firstly, a pile pipe is vibrated to sink to the designed elevation; secondly, all the stone materials are put into the pile pipe; thirdly, before the pile pipe is pulled upwards, the initial height of the stone in the pile pipe is measured through a depth measuring ...

Environment-friendly concrete-dedicated aqueous demoulding agent and preparation method thereof

The invention discloses an environment-friendly concrete-dedicated aqueous demoulding agent and a preparation method thereof. The preparation method comprises the following steps: making aliphatic acid carry out reactions with C3-C5 alkyl alcohol to obtain alkyl aliphatic ester, then mixing the alkyl aliphatic ester with modified polyether, an emulsifier, and an isolating agent to carry out reactions, carrying out high-speed emulsification, adding a penetrating agent, an antirust agent, and a stabilizing agent at the same time, and finally evenly mixing so as to obtain the environment-friendly concrete-dedicated aqueous demoulding agent. The preparation method has a simple technology, the obtained environment-friendly concrete-dedicated aqueous demoulding agent has a very good demoulding ability, the concrete surface is smooth, flat, and flawless after the demoulding, little concrete is adhered on the mould, and the demoulding agent does not corrode the mould and has the advantages of environment-friendliness ...

Unsaturated alkenyl polyether monomer for water reducer of cement and preparation method thereof

The invention discloses an unsaturated alkenyl polyether monomer for water reducer of cement and a preparation method thereof. The polyether monomer has a structural formula shown in HO-(R1)m-(R2)n-R3-CH=CH2, wherein R1 is CH2CH2O, R2 is CH2CH2CH2O, m and n are both integers between 0 and 100 and the sum of m and n is equal to or greater than 50 and less than or equal to 100 and R3 is hydrocarbyl with 2-4 carbon atoms. According to the invention, since alkynol is adopted to have ring-opening polymerization reaction with ethylene oxide and/or propylene oxide under the action of a basic catalyst, the generation of polyethylene glycol and polyethylene glycol mono-alcohol ether which are by-products of an ethoxylation reaction can be effectively reduced and the phenomenon that the molecular weight distribution of the product is broadened is avoided.