38results about How to "Strong stratum adaptability" patented technology

The invention relates to a construction process and equipment for a downhole impacting high-pressure jet grouting pile. An impactor is used for generating certain vibration impact effect in an impacting and sinking process, the impactor is driven by high-pressure air, and damage effect is produced to a soil body structure by virtue of vibration and high-pressure air; meanwhile, auxiliary soil body cutting effect of a high-pressure water jet is utilized at the upper part of the impactor; cutting damage to soil body by high-pressure water, gas and vibration is used for providing conditions for subsequent concrete spraying, under high frequency vibration of a downhole impactor, high-pressure water, high-pressure gas and high frequency vibration generate a linkage mechanism to rapidly soften the soil body at the periphery, the soil body is in a plastic flow state, after a high-pressure pump is transformed to spray high-pressure concrete, the soil in the plastic flow state is fully mixed with concrete, and a cement-soil pile with larger diameter and uniform concrete is formed. In the invention, under the high frequency vibration of the downhole impactor, the high pressure water, the high pressure gas and the high frequency vibration generate the linkage mechanism, diameter of a finished pile is larger, and strength of a pile body is higher.

The invention discloses a slippery water fracturing fluid with ultra-low interfacial tension with crude oil after degradation. The slippery water fracturing fluid is prepared from an ultra-low interfacial tension drag reducer, a demulsify-cleanup additive, a clay stabilizer and a degrading agent. A preparation method of the slippery water fracturing fluid comprises steps as follows: 0.02%-0.10% in percentage by mass of the ultra-low interfacial tension drag reducer, 0.1%-0.2% in percentage by mass of the demulsify-cleanup additive and 0.3% in percentage by mass of the clay stabilizer are added to every ton of water, the agents are mixed to form a homogeneous solution, and 0.08% of the degradation agent is added from a mixing tank of blending equipment during construction. Additives of the slippery water fracturing fluid are all liquid phase, and the slippery water fracturing fluid can be quickly dispersed in water, have good salt tolerance, are not easily affected by the content of bacteria in a fluid preparation solution and have a stable drag reduction effect under the construction displacement of 6-20 m<3>/min; when applied to improvement of low-permeability oil and gas reservoirs, the slippery water fracturing fluid can reduce the interfacial tension between a gel breaking liquid and crude oil and reduce string and construction friction, helps production of the crude oil, increases of the yield of the crude oil and can be prepared repeatedly from backflow fracturing fluids.

The invention discloses a method for positioning temporary middle walls in a large-section tunnel supporting structure of a formation with a soft top and a hard bottom. The method comprises the following steps of (1) analyzing a stress state of a structure of the formation with the soft top and the hard bottom by using a force method in structural mechanics and preliminary bracing stress properties, analyzing the stress state of a preliminary support of a tunnel when the middle walls do not exist, calculating a foundation load of arch feet of the preliminary support of the tunnel when the middle wall do not exist, analyzing the stress state of the preliminary support of the tunnel when the middle walls exist, and calculating the foundation load of the preliminary support of the tunnel when the middle walls exist; (2) further discussing a stress mechanism of the structure of the formation with the soft top and the hard bottom according to analysis of the stress state; and (3) preliminarily judging whether the temporary middle walls of an upper step, a middle step and a lower step are mounted or not according to a formation mode, the specific position of a boundary of the formation with the soft top and the hard bottom and the condition of hardness of surrounding rocks.

The invention discloses a collapsible loess wellpoint presoaking dynamic compaction replacement method, and belongs to a deep collapsible loess foundation treatment method. The method comprises the steps that firstly, the treatment range and the treatment depth of a foundation are determined; secondly, within the foundation treatment range, a cushion material is laid on the whole surface; thirdly, according to the foundation treatment depth, a wellpoint hole is drilled out, a presoaking wellpoint pipe is vertically arranged in the wellpoint hole according to presoaking parameters, and water-pervious holes are evenly distributed in the wall of the pipe stretching into the foundation; fourthly, the presoaking wellpoint pipe is connected with a water injection pipe, and the foundation is subject to presoaking treatment; fifthly, the foundation is subject to dynamic compaction replacement treatment; and sixthly, the foundation quality is tested and is subject to acceptance check. The method is easy and convenient to construct, large in treatment depth, short in construction period and capable of effectively removing collapsibility of the deep collapsible loess foundation, and the bearing force of the foundation obtained after treatment is high.

The invention discloses a composite profile control method for middle-high permeability oil reservoirs and belongs to the technical field of profile control of oil reservoirs. The composite profile control method for the middle-high permeability oil reservoirs is characterized in that the method comprises the following steps that 1, tracer agent detecting is conducted on a target block, and the waterline advance speed is determined; 2, polymeric microspheres are injected into a water injection well; 3, formation water is injected into the water injection well; 4, oil wells are selected according to the waterline advance speed of oil wells in the target block; 5, biopolymer solutions are injected into the selected oil wells; and 6, the oil wells injected with the biopolymer solutions are started up for production after being shut down for 10 d-20 d, and the rest of oil wells conduct normal production. The composite profile control method for the middle-high permeability oil reservoirs has the advantages of being wide in oil reservoir application range, good in plugging and adjusting effect and long in profile control validity period; the used profile control agents are small in using amount, low in cost and high in high-temperature resistance, salt resistance and stratum adaptability; thus, the composite profile control method can be widely applied to the technical field of water shut-off and profile control of the middle-high permeability oil reservoirs.

The invention discloses a supporting and reverse propelling device of a shield testing machine. The supporting and reverse propelling device comprises the shield testing machine, wherein the shield testing machine is fixedly arranged on a main body base; the supporting and reverse propelling device further comprises a guide groove, a propelling power device and a reverse propelling device with horizontal positioning; the main body base is connected with the guide groove in a sliding way; the propelling power device is connected with the shield testing machine in a transmission way; the guide groove and the propelling power device are both fixedly arranged on a system supporting platform; and the system supporting platform is perpendicularly connected with the reverse propelling device in a sliding way. The supporting and reverse propelling device has the advantages of reasonable structural design, functional diversity, strong generality, strong adaptability to a formation and broad application prospect and can be also used as teaching equipment; and the shield testing machine can be widely applied to simulation of complicated tunnel shield construction conditions.

The invention provides a down hole impacting rotary jetting mixing pile construction technology and device. The down hole impacting rotary jetting mixing pile construction device includes a drill rod, a down hole impacting device arranged at the bottom end of the drill rod, a mixing device connected to the lateral side of the drill rod or the down hole impacting device, and a nozzle arranged on the lateral side of the down hole impacting device. A communicating high-pressure air passageway is arranged among the drill rod, the nozzle and the down hole impacting device. The above down hole impacting rotary jetting mixing pile is adopted in the down hole impacting rotary jetting mixing pile construction technology. By means of the down hole impacting rotary jetting mixing pile construction technology and device, the stratum adaptability is high, and pollution and influences of industrial production to the environment are reduced.

Provided is a foundation pit bracing water stopping structure with a support pile and a three-axis stirring pile arranged in a cased drilling manner. The support pile is constructed on the outer side of a foundation pit; the stirring pile is constructed in a support pile area in a three-axis stirring manner; and the support pile directly cuts a pile body on the three-axis stirring pile for construction, and the whole bracing water stopping structure is formed. The three-axis stirring pile is large in power, and can perform stirring in strong-weathered rock and the above stratum. Compared with a conventional small diameter cement stirring pile, the beneficial effects of being small in number of lap joints, good in water stopping effect, high in construction efficiency, high in stratum adaptability and the like are achieved; and compared with a jet grouting pile, the beneficial effects that the water stopping effect is good, and price is low are achieved. According to the foundation pit bracing water stopping structure with the support pile and the three-axis stirring pile arranged in the cased drilling manner, the support pile and the three-axis stirring pile are combined together, construction is performed in the manner that the support pile and the three-axis stirring pile arranged in the cased drilling manner, the stratum condition can be improved, the problem of hole collapse of the support pile is effectively solved, a water stopping effect better than that of the conventional stirring pile and the jet grouting pile can also be achieved, meanwhile the occupied space of a supporting structure is saved, and the water stopping capacity of an existing pile-in-row bracing water stopping structure is enhanced.

The invention relates to a method and a device for forming a wall through rolling a groove, belongs to an all-new construction method and special equipment for constructing an underground diaphragm wall, and belongs to the field of water conservancy hydropower and the field of geotechnical engineering. Drilling systems on two sides are separately and fixedly connected with a lifting device; two ends of a roller system at the bottom are separately connected with the corresponding drilling system; a flushing pipe assembly is arranged on a roller. The method comprises the following steps that a groove is formed in a stratum through surface milling to form a groove segment; materials including cement grout and the like can be directly injected into the groove section; the injected materials are stirred and mixed with stratum particles; solidification is performed on the stirred and mixed materials to form the wall. According to the method disclosed by the invention, a slurry dado can also be adopted and is replaced by materials including concrete and the like, or a geomembrane is arranged, so that an underground diaphragm wall or an impermeable barrier is built. The method and the device disclosed by the invention is suitable for various of soil layers, sand layers, gravel stone layers and strong-weathering rock strata; the stratum particles are cut and peeled off through surface milling, and groove holes can be formed in the slurry dado, and then the slurry is replaced by the materials for forming the wall, so that the wall is formed; and a self-solidifying type grout can also be used for stirring into the strata to form the underground diaphragm wall directly.

The invention relates to the technical field of building construction, in particular to a multi-layer bonding composite three-dimensional fabric foundation pit waterproof curtain supporting structureand a construction method thereof. The multi-layer bonding composite three-dimensional fabric foundation pit waterproof curtain supporting structure comprises a plurality of cast-in-situ bored piles and foundation pit connecting parts arranged among the cast-in-situ bored piles and used for connecting the cast-in-situ bored piles; the plurality of cast-in-situ bored piles are uniformly arranged atintervals; and each foundation pit connecting part comprises a strip-shaped foundation trench and a reinforcement cage arranged in the strip-shaped foundation trench, and a plurality of layers of composite three-dimensional fabrics are horizontally arranged in the reinforcement cage; The piles are connected into a whole through the composite three-dimensional fabrics and reinforced concrete, thestrength is improved, and the water stop performance is enhanced; the water stopping capability is improved by about 30%; and the supporting strength of the cast-in-situ bored piles is improved by 15%-20%; Compared with a large-volume concrete structure, the used composite three-dimensional fabric has the advantages that the use amount of concrete is saved, the construction cost is reduced by about 10%, and the environment is improved; and epoxy asphalt is used as an adhesive of each layer of three-dimensional fabric, so that the composite three-dimensional fabric is endowed with relatively strong water stop performance and bonding stability.

The invention provides an MCF fracturing temporary plugging agent and a preparation method and application thereof.The MCF fracturing temporary plugging agent comprises main components and additives, the main components comprise petroleum resin, ozocerite and calcium stearate, the additives comprise thermosetting resin, water-soluble resin and positive electricity gel, and the weight ratio of the additives to the main components is 1: (10-50). The MCF fracturing temporary plugging agent provided by the invention belongs to an oil-soluble resin temporary plugging agent, has the technical advantages of high compression strength, full degradation, adjustable particle size, safety, environmental protection, no danger, small dosage, low cost and the like, and has a wide application prospect.