Construction regulation means of prestressing force steel construction stretching end cable force

The invention relates to the technical field of building construction, in particular to a construction regulating method of a pre-stressed steel structure stretching and drawing end cable force, which comprises the following steps: a. determining the initial status of a pre-stressed steel structure by the calculation of a finite element model, obtaining a cable zero status length Li and a target cable force Fi of the pre-stressed steel structure stretching and drawing end; b. stretching and drawing the pre-stressed steel structure cable end according to the target cable force Fi of the pre-stressed steel structure stretching and drawing end; c. actually measuring the cable force Fi1 of the pre-stressed steel structure stretching and drawing end for the first time; d. inputting the cable force Fi1 of the pre-stressed steel structure stretching and drawing end into the original finite element model, obtaining the cable zero status length Li1 by a first-time calculation and calculating delta ...

High hardness ZrN/Al2(O1-xNx)3 nanometer multicoating

Cement mixer

The invention relates to a building construction device, in particular to a cement mixer which carries out cement grouting operation to a reserved bellow pore channel after stretching the reinforcing steel bar in a reinforced concrete structure. The cement mixer mainly comprises a mixing drum which is provided with a motor and a stock outlet, the motor is connected with a vertical axis in the mixing drum, and the vertical axis is provided with a group of mixing blades and two groups of mixing blades. As a group of mixing blades are added on the basis of one group of mixing blades in the prior art, the cement can be mixed fully and evenly in the mixing drum, thus meeting the demand that the water cement ratio of the cement used for grouting is about 0.4 in the national construction specifications.

Grouting material and vacuum grouting process in prestressed concrete engineering

The present invention relates to a grouting material and its vacuum grouting process in the prestressed concrete engineering. Said grouting material is fomed from 65-90 wt% of cement, 35-10 wt% of auxiliary material and proper quantity of water. Said auxiliary material is a special one formed from aluminosilicate ore powder, calcium thioaluminate ore powder and adjuvant. Said grouting material isgood in workability, low in porosity, high in strength and strong in durability. Its vacuum grouting process includes the following three steps: evacuating, evacuating and grouting and grouting.

Reinforced bar straight thread joint

The invention relates to the technical field of constructional engineering, in particular to a steel reinforcement straight thread connector widely used in buildings. The steel reinforcement straight thread connector comprises a connecting sleeve the inside of which is connected with a steel reinforcement, and is characterized in that internal threads of the connecting sleeve and external threads for connecting the steel reinforcement are multiple threads. Due to adoption of the technical proposal, the steel reinforcement straight thread connector improves the production efficiency, quickens the assembling speed of the steel reinforcement on the construction field, lightens the labor intensity of construction staff, is suitable for the requirements of development of modern building operations, and promotes the technical progress of the industry.

Method for mounting space prestressed steel structure cable adaptor

Method for mounting space prestressed steel structure cable adaptor

The invention relates to a method for installing a cable adaptor of a spatial prestressed steel structure. The method comprises the following steps of: a. recording coordinates of the center of an end closed board of each cable adaptor of the spatial prestressed steel structure for a total station instrument to be layed-out and positioned; b. fastening and connecting a three-dimensional coordinate locating instrument with a preembedded piece through a connecting device; c. adjusting a three-dimensional position of a conical point of a prism of the three-dimensional coordinate locating instrument, and rotating the prism to make the mirror face of the prism opposite to a flat plate of the preembedded piece; d. attaching a chassis of a laser vertical projector to the flat plate of the preembedded piece to make relative displacement so as to ensure that a laser beam projecting mottle is superposed with the conical point of the prism and is crossed with a delay line of a laser beam on the flat ...

Nondestructive test method for testing tension of prestress anchorage system

The invention relates to a nondestructive test method for testing tension of a prestress anchorage system, belonging to the technical field of engineering construction quality test. The method is operated as the following steps: mounting an acceleration sensor; testing the response property of the sensor by the excitation of an exciting hammer; demarcating parameters and measuring tension; and computing tension with reference to a formula. The method for testing tension of the prestress anchorage system solves the problem that the previous prestress anchorage system can not implement nondestructive test, and simultaneously, striking excitation and vibration response test are both performed on the anchor head of the prestress anchorage system, therefore, the test is convenient and fast, and the tension of the system can be calculated from the measured parameter conveniently.

Reinforcement end reinforced large-diameter straight thread connector and connecting method thereof

The invention relates to the technical field of building construction, in particular to a reinforcement end reinforced large-diameter straight thread connector for a reinforced concrete frame structure of a building and a connecting method thereof. The reinforcement end reinforced large-diameter straight thread connector comprises a screw and a screw sleeve; two ends of the screw are provided with an external straight thread respectively; an internal straight thread matched with the external straight threads on the screw is formed in the screw sleeve; the external straight threads of the screw are screwed with the internal straight thread of the screw sleeve; and the diameters of the internal straight thread and the external straight threads which are matched are 30 to 40 millimeters. The connecting method for the reinforcement end reinforced large-diameter straight thread connector alternately screws the screw and the screw sleeve with the same diameter and the same screwing direction ...

Nondestructive test method for testing tension of prestress anchorage system

The invention relates to a nondestructive test method for testing tension of a prestress anchorage system, belonging to the technical field of engineering construction quality test. The method is operated as the following steps: mounting an acceleration sensor; testing the response property of the sensor by the excitation of an exciting hammer; demarcating parameters and measuring tension; and computing tension with reference to a formula. The method for testing tension of the prestress anchorage system solves the problem that the previous prestress anchorage system can not implement nondestructive test, and simultaneously, striking excitation and vibration response test are both performed on the anchor head of the prestress anchorage system, therefore, the test is convenient and fast, andthe tension of the system can be calculated from the measured parameter conveniently.

Post-tensioned concrete structure pore squeezing quality detection method

The invention relates to the technical field of non-destructive test, in particular to a method for detecting the mud jacking quality of a channel with a post tensioned stressed concrete structure, which comprises the following steps: a. a through hole is at least arranged on the channel with the stressed concrete structure; b. an observation tube provided with a transparent film is firmly connected to the through hole of the channel; c. concrete is cast on the outside of the channel, and grouting is performed on the channel after concrete is solidified and a steel stranded wire is pulled; and d. mud in the channel is observed through the observation tube, so as to determine whether the mud in the channel is dense. Due to adoption of the technical proposal, the method simplifies the means for detecting the mud jacking quality of the channel with the stressed concrete structure, and eliminates the potential safety hazards of a stressed concrete structure.

Construction regulation means of prestressing force steel construction stretching end cable force

The invention relates to the technical field of building construction, in particular to a construction regulating method of a pre-stressed steel structure stretching and drawing end cable force, which comprises the following steps: a. determining the initial status of a pre-stressed steel structure by the calculation of a finite element model, obtaining a cable zero status length Li and a target cable force Fi of the pre-stressed steel structure stretching and drawing end; b. stretching and drawing the pre-stressed steel structure cable end according to the target cable force Fi of the pre-stressed steel structure stretching and drawing end; c. actually measuring the cable force Fi1 of the pre-stressed steel structure stretching and drawing end for the first time; d. inputting the cable force Fi1 of the pre-stressed steel structure stretching and drawing end into the original finite element model, obtaining the cable zero status length Li1 by a first-time calculation and calculating delta ...

Screw rod drilling tool centralizer

The utility model provides a screw rod drilling tool centralizer belongs to oil exploration equipment field, including the screw rod body, this screw rod body is including the first end that can be connected with drive device, and with the second that is connected with the drilling tool installation first that first end is relative is held, and this drilling tool installation head is used for installing the drilling tool, the outside cover of screw rod body is equipped with the centralizer, the centralizer includes consecutive first centralizer, second centralizer and third centralizer. This kind of screw rod drilling tool centralizer can be applied to big displacement well by a wide margin, in the long hold angle section of highly deviated well, can reduce the slip ratio by a wide margin, reduces well track rate of whole angle change (the dog -leg that is commonly called as is promptly seriously spent), can also improve the well cleanliness indirectly and ensure downhole safety. Compare ...

Post-tensioned concrete structure pore squeezing quality detection method

The invention relates to the technical field of non-destructive test, in particular to a method for detecting the mud jacking quality of a channel with a post tensioned stressed concrete structure, which comprises the following steps: a. a through hole is at least arranged on the channel with the stressed concrete structure; b. an observation tube provided with a transparent film is firmly connected to the through hole of the channel; c. concrete is cast on the outside of the channel, and grouting is performed on the channel after concrete is solidified and a steel stranded wire is pulled; and d. mud in the channel is observed through the observation tube, so as to determine whether the mud in the channel is dense. Due to adoption of the technical proposal, the method simplifies the meansfor detecting the mud jacking quality of the channel with the stressed concrete structure, and eliminates the potential safety hazards of a stressed concrete structure.

Manual mud jack

The invention relates to auxiliary equipment for building operations, in particular to a manual grout pump for complementing grout after the grout injection of the pore channel of a prestress corrugated pipe. The piston cavity of the manual grout pump is connected with a grout suction cavity, a piston is arranged in the piston cavity, a first stage one way valve is arranged in the grout suction cavity of which the outer side is provided with a grout suction opening, and a second stage one way valve is arranged in a grout discharge cavity of which the outer side is provided with a grout discharge opening; a grout delivery pipe is communicated with the grout suction cavity and the grout discharge cavity, and grout jacking devices are arranged on the piston and the grout discharge cavity. By adopting the technical scheme, the manual grout pump prevents the hidden trouble caused by the crescent-shaped gap after the prehardening of grout injected into the pore channel by a traditional grout ...

Ti-Al-O-N hard composite coatingand its preparing method

The present invention relates to composite Ti-Al-O-N coating and its preparation process, and to ceramic coating. The coating consists of Ti 18-36 at%, Al 17-32 at%, O 4-24 at% and N 27-41 at%, and exists as crystal state. The coating is prepared on metal or ceramic material substrate with Ti-Al alloy target or composite Ti-Al target and through reaction and sputtering with Ar, N2 and O2 mixture gas. Adding O element into traditional Ti-Al-N coating makes the coating possess excellent high temperature oxidation resistance and high hardness over 32 GPa. The present invention has high application value as antiwear coating on high speed cutter, dry cutter and high temperature work part.

Slurry displacement process for screen pipe completed oil and gas well

The invention relates to the field of screen pipe completed horizontal wells of oil/gas wells, in particular to a slurry displacement process for a screen pipe completed oil and gas well. The process comprises the following steps of: displacing with a certain volume of reservoir protection liquid at the bottom of the well after a wellbore is drilled and before a screen pipe is descended; descending the screen pipe, wherein the reservoir protection liquid which is displaced for the first time is completely or partially squeezed to fill annular spaces of the wellbore and the screen pipe during the descending of the screen pipe; and displacing slurry in the screen pipe with the reservoir protection liquid by descending a drilling tool to the bottom of the well after the screen pipe is descended. By the process, the slurry inside and outside the screen pipe of a hydrocarbon reservoir section of the screen pipe completed well is completely displaced, a hydrocarbon reservoir is protected well ...