Cast-in-place geopolymer pile with heating system

Methods of preparing cast-in-place geopolymer piles using electrical heating wire (130) to provide heat to cure the piles are described. The heating wire (130) can be associated with a reinforcement cage (120) inserted in the pile shaft. Rod-shaped heating units comprising electrical heating wire (130) can be inserted into a pile shaft and can be reusable. Geopolymer piles with high compressive strength can be prepared from mixtures of class F fly ash and aqueous sodium hydroxide by heating the piles with the heating wire to a stable curing temperature for at least about 24 hours.

Anti-Deviation Rotary Drilling Tool for Karst Stratum and Drilling Method Thereof

The present invention discloses an anti-deviation rotary drilling tool for Karst stratum and a drilling method thereof, and relates to the field of rotary drilling technologies. The tool comprises a perpendicularity maintaining cylinder, a rotary drilling bit, connecting pins, a drilling bit salvaging plate, and a reinforcing assembly. The rotary drilling bit comprises a drilling residue cylinder and a drilling bit square sleeve arranged at the center of the top end of the drilling residues cylinder. The first connecting pin holes are formed in the drilling bit square sleeve. The drilling bit square sleeve is used for connecting a rotary drill pipe through the connecting pins. The perpendicularity maintaining cylinder is fixed to the upper end of the drilling residue cylinder. The perpendicularity maintaining cylinder and the drilling residue cylinder are fixedly connected with the reinforcing assembly. Working holes are formed in the lower end of the side wall of the perpendicularity maintaining cylinder. The working holes correspond to the positions of the first connecting pin holes. The drilling bit salvaging plate is arranged at the top of the perpendicularity maintaining cylinder. The drilling bit salvaging plate is a ring-shaped steel plate, and an annular bulge is arranged at the inner edge of the ring-shaped steel plate and extends downwards. The anti-deviation rotary drilling tool for Karst stratum and a drilling method thereof, proposed by the present invention, are applied to the drilling in the severe inhomogeneous stratum, such as Karst development areas, etc., or the construction of foundation-pit-support piles in row. 1/2 1 2 9 10 3 11 4 L~ U; L 4 6 FIG. 1

Reinforcement method for red mud disposal sites

The invention discloses a reinforcement method for red mud disposal sites. Deep mixing equipment is utilized to mix curing agent into red mud, the curing agent and the red mud carry out polymerization reaction to form piles with certain strength and depth, the diameter of each pile is 500mm, the piles overlap one another in a horizontal or longitudinal direction, so that continuous horizontal or longitudinal walls are formed, and the thickness of the walls is equal to the diameter of each pile. The horizontal and longitudinal walls in parallel are perpendicularly combined crosswise according to a certain interval, so that a lattice-shaped grid structure is formed, the grid structure and a dam jointly bear horizontal lateral pressure generated by red mud piling, and thereby the safety of a red mud disposal site is increased. The reinforcement method for red mud disposal sites has the advantages of simple and convenient construction and low cost.

Method of producing geopolymer cement utilizing desulfurized red mud

Red mud-based geopolymer compositions and methods of their preparation are described. The red mud-based geopolymer compositions can be cured at ambient temperatures using alkaline solutions of relatively low alkaline compound concentration compared to other geopolymer compositions. In particular, the use of a red mud previously utilized in a flue gas desulfurization process can provide high strength geopolymer compositions.

Method for filling underground cavity in bedrock by grouting and hydraulic filling device

METHOD FOR FILLING UNDERGROUND CAVITY IN BEDROCK BY GROUTING AND HYDRAULIC FILLING DEVICE The present invention relates to the technical field of karst cave filling, and provides a method for filling an underground cavity (8) (especially a karst cave and a roadway with a large buried depth of greater than 30.0 m or with a large space) in bedrock (17) by grouting. The method includes determining a drilling position, drilling through overburden soil (16), installing a conveying casing (7), drilling in a bedrock section (17), filling by a hydraulic filling method and grouting. In the present invention, the underground cavity (8) is filled with sand and gravel aggregates (10) by using the hydraulic filling method, and then grouted to solidify the filled sand and gravel aggregates (10) to improve the integrity of the filling material. The filled sand and gravel aggregates (10) occupy the space in the underground cavity (8), greatly reducing the amount of grouting and reducing the treatment cost ...

Reinforcement processing method of soft foundation

The invention discloses a reinforcement processing method of a soft foundation, comprising the following steps: (1) well-point dewatering system installation and drainage; (2) rolling-compaction dynamic consolidation; (3) sand (gravel) pile arrangement; and (4) forced ramming dynamic consolidation. In the invention, sand (gravel) piles, drainage and dynamic consolidations are organically combined based on the engineering properties of freshly dredger soft soil, thereby reaching implementation and processing effects on a freshly dredger soft soil foundation; the method has technical and economic advantages of short construction period, low construction cost, more than 8m of processing depth and good processing effect; and the method is suitable for freshly dredger soft soil, lake salinized soil and the like. The processed foundation can meet the requirement of general engineering construction.

Method for detecting shape of large-diameter vertical shaft hole

The invention discloses a method for detecting a shape of a large-diameter vertical shaft hole. The method for detecting the shape of the large-diameter vertical shaft hole comprises the following steps that the vertical shaft hole is regarded as two concentric shaft holes, the size of the diameter of the inner shaft hole is set, and the inner shaft hole is regarded as a perpendicular shaft hole; the center of the shaft hole is set as the origin of coordinates, a WE direction and an NS direction which are perpendicular to each other are determined on the circumference of the inner shaft hole to serve as coordinate axes, and the four intersection points with the circumference are X, X', Y and Y' respectively and are regarded as detection points; a logging instrument is arranged in a shaft mouth and is adjusted to be level, detection parameters are set, detection probes are lowered at the four detection points of the shaft hole respectively and are maintained to be in a natural sagging state ...

Formula of anti-corrosion concrete used for filling pile and preparation method of anti-corrosion concrete

The invention discloses a formula of anti-corrosion concrete used for a filling pile and a preparation method of the anti-corrosion concrete. Ordinary Portland cement and two-stage coal ash are adopted as cementing agents for concrete, and an appropriate amount of high molecular material polyacrylate and sodium nitrite are added to be used as modified materials for concrete, so that the concrete, with the function of preventing the erosion of sulfate and chloride ions, for the filling pile is prepared. The doping amount of the coal ash is given by adopting a computation method, so that the design of mix proportion is more reasonable; the concrete has better workability, and the working performance of the concrete for the filling pile is guaranteed; a chloride ion penetration experiment proves that the electric flux is quite low, and accordingly, the concrete has higher compactness; especially, after the concrete is put into a sodium sulfate solution of 10% and subjected to dry-wet cycling ...

Follow-up mud jacking rotary digging drilling hole bored concrete pile technology

The pile constructing process includes the following steps: rotationally drilling pile hole; setting steel bar cage and mortar post-injecting apparatus; depositing concrete; and post-injecting mortar. After the mortar post-injecting apparatus comprising longitudinal mortar injecting tube and transverse mortar outflow tubes is set inside the steel bar cage and in some time after concrete deposition, mortar post-injecting operation is performed, which includes opening loop, injecting clear water and injecting mortar. The present invention features no slurry pollution, raised pile quality, raised bearing capacity of pile and greatly raised construction speed.

CAST IN PLACE GEOPOLYMER CONCRETE PILE WITH HEATING UNIT

Methods of preparing cast-in-place geopolymer piles using electrical heating wire ( 130 ) to provide heat to cure the piles are described. The heating wire ( 130 ) can be associated with a reinforcement cage ( 120 ) inserted in the pile shaft. Rod-shaped heating units comprising electrical heating wire ( 130 ) can be inserted into a pile shaft and can be reusable. Geopolymer piles with high compressive strength can be prepared from mixtures of class F fly ash and aqueous sodium hydroxide by heating the piles with the heating wire to a stable curing temperature for at least about 24 hours.

Reinforcement processing method of soft foundation

The invention discloses a reinforcement processing method of a soft foundation, comprising the following steps: (1) well-point dewatering system installation and drainage; (2) rolling-compaction dynamic consolidation; (3) sand pile or gravel pile arrangement; and (4) forced ramming dynamic consolidation. In the invention, sand piles or gravel pile s, drainage and dynamic consolidations are organically combined based on the engineering properties of freshly dredger soft soil, thereby reaching implementation and processing effects on a freshly dredger soft soil foundation; the method has technical and economic advantages of short construction period, low construction cost, more than 8m of processing depth and good processing effect; and the method is suitable for freshly dredger soft soil, lake salinizedsoil and the like. The processed foundation can meet the requirement of general engineering construction.

Drilling method of rotary drilling machine in hard rock and special-purpose sediment pipe core cone bit

The invention discloses a drilling method of rotary drilling machine in hard rock and a special-purpose sediment pipe core cone bit. The drilling method comprises the steps of: (1) installing an gas-water joint; (2) installing a sediment pipe gear wheel core drill bit; (3) connecting an inflator, the gas-water joint and the sediment gear wheel core drill together by air supply flexible pipes; (4) putting the drill bit in an aperture, starting the inflator to supply air into the aperture and simultaneously operating the rotary drilling machine for drilling; (5) after the drilling, powering off the inflator, taking out the sediment pipe gear wheel core drill bit, opening the sediment pipe valve to remove the sediment in the pipe and then closing the valve; (6) repeating the above steps until pore-forming is completed. Comparing with routine methods, the method applies a drill bit with a simple and durable structure, small wearing of the drilling tool, high efficiency of drilling and good ...

METHOD OF PRODUCING GEOPOLYMER CEMENT UTILIZING DESULFURIZED RED MUD

Red mud-based geopolymer compositions and methods of their preparation are described. The red mud-based geopolymer compositions can be cured at ambient temperatures using alkaline solutions of relatively low alkaline compound concentration compared to other geopolymer compositions. In particular, the use of a red mud previously utilized in a flue gas desulfurization process can provide high strength geopolymer compositions. 1. A geopolymer composition comprising a reaction product of a reaction mixture comprising an alkaline solution and a solids mixture , wherein the solids mixture comprises red mud and an alumina silicate material , wherein the alumina silicate material comprises at least about 10 weight % (wt %) CaO and is selected from the group consisting of Class C fly ash , lime-Class F fly ash , blast furnace slag , and combinations thereof , and wherein the alkaline solution comprises an aqueous solution comprising at least one alkali metal hydroxide , optionally in combination with one or more additional alkaline compound.2. The composition of claim 1 , wherein the alumina silicate material comprises Class C fly ash comprising between about 15 wt % and about 21 wt % CaO.3. The composition of claim 1 , wherein the aqueous solution comprises between about 1.5 moles per liter (mol/L) and about 6.5 mol/L of the alkali metal hydroxide.4. The composition of claim 3 , wherein the aqueous solution comprises between about 2.5 mol/L and about 3.5 mol/L of the alkali metal hydroxide.5. The composition of claim 1 , wherein the alkali metal hydroxide is sodium hydroxide (NaOH).6. The composition of claim 1 , wherein the reaction mixture comprises a weight ratio of alkaline solution to solids mixture of between about 0.4 and about 0.6.7. The composition of claim 1 , wherein the solids mixture has a weight ratio of red mud to alumina silicate material of between about 40:60 red mud:alumina silicate material and about 60:40 red mud:alumina silicate material.8. The ...

Method for consolidating soft soil ground foundation by dynamic pre-drainage consolidation method

Shield pile cutting parameter priority determining method and device, equipment and medium

The invention relates to the field of cutter design and construction of tunnel shield tunneling machines, and provides a shield pile cutting parameter priority determining method, device and equipment and a medium. The method comprises the steps that site survey information, construction parameters and cutter parameters are obtained; building a cutting concrete numerical model according to the field survey information, wherein the cutting concrete model is used for simulating a pile cutting tool to cut pile foundation concrete; the concrete cutting numerical model is calculated according to the construction parameters and the tool parameters, at least two pieces of cutting force information are obtained, and the cutting force information comprises corresponding cutting force when the construction parameters and the tool parameters are adjusted; according to the cutting force information, an orthogonal simulation test is made to determine the priority when the construction parameters and ...

Method for consolidating soft soil ground foundation by dynamic pre drainage consolidation method

The invention discloses a method for reinforcing a coastal recent blow filled soft ground, comprising the following steps that: firstly, a pre-drainage device is manufactured and assembled; secondly, pre-drainage is performed for the first time, and dynamic drainage measures are auxiliarily increased; thirdly, dynamic consolidation is performed for the first time; fourthly, the pre-drainage is performed for the second time; fifthly, the dynamic consolidation is performed for the second time; sixthly, the pre-drainage is performed for the third time and the drainage device is disassembled; seventhly, the dynamic consolidation is performed for the third time. The method is based on the dynamic property, the drainage consolidation mechanism and the dynamic consolidation mechanism of saturated soft soil and organically integrates the well point precipitation technology, the dynamic drainage technology and the heavy tamping dynamic consolidation technology, thereby the method guarantees the ...

A downthehole anti - drilling tool device that circulates for major diameter shaft pore -forming

The utility model relates to a downthehole anti - drilling tool device that circulates for major diameter shaft pore -forming, the drilling rod top is the unit head in its structure, has a mouth of a river for the drill bit bottom, is equipped with a sediment section of thick bamboo that is curved by the spiral pipe at drilling rod outside cover, and sediment section of thick bamboo upper end is uncovered, and the lower extreme bottom is sealed, and it has the slag notch to lie in to open on the drilling rod of sediment section of thick bamboo top. The utility model discloses move down from ground " slag notch " for can be in the anti - technology construction of circulating of downthehole formation, solved in the basement rock crushed zone that mud is seriously missed, the major diameter engineering shaft of normally reverse circulation drilling becomes the well problem of being under construction.