9results about How to "Improve construction reliability" patented technology

The invention relates to the technical field of highway engineering, and discloses a middle-guide-free multi-arch tunnel preceding hole counter-force pre-applying design method which is based on a radial reinforcing anchor rod and comprises the steps that a middle-guide-free multi-arch tunnel preceding hole counter-force pre-applying design method is adopted, and the middle-guide-free multi-arch tunnel preceding hole counter-force pre-applying design method is adopted; radial reinforcing anchor rods are arranged at the position, close to the arch shoulder of the rear hole side, of the front hole in a driving mode, unstable surrounding rock of the triangular area is reinforced through the radial reinforcing anchor rods, and radial pre-applied counter force is provided so that the arch shoulder structure of the front hole can be effectively restrained. After the preceding hole is excavated, the counter-force pre-applying design method for the preceding hole of the middle-guiding-free multi-arch tunnel can guide the arch shoulder radial reinforcing anchor rod to be driven at the most economical and effective position, angle and length through calculation, unstable surrounding rock in a triangular area is pre-reinforced before the following hole is excavated, and tension is provided to restrain the deformation of the arch shoulder structure; therefore, possible cracking and even damage of the first hole structure are prevented, the local stability of the hidden middle wall side of the first hole is improved, and tunnel structure safety and construction safety are guaranteed.

The invention provides a drilling method and system which are applied to a drilling mechanism comprising a drill tower device and a conveying device, and the drill tower device is provided with a first power head, a second power head, an iron roughneck and a grabbing device. The drilling method comprises the steps that the drilling mode of the drilling mechanism is obtained; the drilling tool to be connected is conveyed to a first preset position or a second preset position based on the drilling mode; when it is obtained that the to-be-connected drilling tool is located at the first preset position, a grabbing device and a first power head are driven to be sequentially in butt joint with the to-be-connected drilling tool, then an iron roughneck is driven to centralize the to-be-connected drilling tool and lock the to-be-connected drilling tool and a previous drilling tool, and after locking, the first power head is driven to drill downwards; and when it is obtained that the to-be-connected drilling tool is located at a second preset position, the first power head is driven to move to be in butt joint with the to-be-connected drilling tool, then the first power head is moved to make contact with the previous drilling tool and is locked, and after locking, the first power head and the second power head are driven to drill downwards. And different stratum conditions and engineering project requirements are met.

The invention discloses a synchronous pull-back method for a horizontal directional drilling submarine pipeline, which comprises the following steps of: installing a pull-back tool at the tail end of a drill rod, and discarding the seabed; leveling a pipe-laying ship stinger; a submarine pipeline is prefabricated to the stern through an operation line, and a pull-back seal head is welded; the pipe laying ship is anchored in place; the salvage pull-back tool is connected with the submarine pipeline; the stinger is adjusted, the tensioner is started, and the submarine pipeline reaches the preset tension; submarine pipelines are prefabricated through the pipe laying ship; the drilling machine pulls the drill rod to drive laying of the submarine pipeline; front and back anchoring is carried out, the pipe laying ship is adjusted, and the synchronism of submarine pipeline prefabricated launching and drill rod drawing water outlet is achieved; welding a termination end socket, connecting an A / R cable, opening a tensioner, and performing tension conversion; and releasing the back-dragging tool and unearthing the submarine pipeline. According to the synchronous back-dragging method for the horizontal directional drilling submarine pipeline, only anchoring operation of a pipe laying ship is needed, large-area construction occupying the sea is not needed, and the contradiction of using the sea is reduced.

The invention relates to an underground tunnel construction method and system, and relates to the field of underground tunnel construction.The underground tunnel construction method comprises the steps that geological stability influence analysis is conducted according to optimal waterproof barrier layout distribution, first geological stability distribution is obtained, tunnel construction simulation is conducted, and first construction time information is obtained; correcting the first construction time information according to the construction time of the waterproof barrier to obtain first corrected construction time information; according to the first corrected construction time information, the first geological stability distribution and the maximum waterproof score, a first tunnel construction score is obtained through calculation, tunnel route planning optimization continues to be conducted, and an optimal tunnel route is obtained. Through the method, the technical problem that the construction progress and the construction safety are affected due to the fact that tunnel route planning cannot accurately avoid an underground water high-risk area due to the fact that a traditional method lacks accurate evaluation on underground water influence factors can be solved; the scientificity and the accuracy of tunnel route setting can be improved, and the construction progress and the construction safety are ensured.

This invention relates to the field of caisson bottom sealing construction technology, and discloses a dynamic sealing sludge and water inrush sealing system for caissons. The system integrates a bottom sealing template assembly, a dynamic sealing baffle, a novel quick-setting sealing grout injection assembly, a drainage and pressure relief assembly, a fixing and anchoring assembly, and an anti-sludge isolation assembly. The bottom sealing operation is completed through an integrated process of layered sealing, immediate curing, and simultaneous bottom sealing. During construction, the base is first cleaned and the components are installed; after the dynamic sealing baffle is deployed, it is hydraulically attached to the base plate and the water inrush point is detected; then, quick-setting grout is injected into the leakage area in a targeted manner, and drainage and pressure relief are simultaneously activated to regulate the pressure; after the grout has quickly set, the baffle is retained as a permanent water-stopping structure; finally, underwater concrete is continuously injected through a pre-set pipeline, and an anti-sludge isolation layer is set to ensure the density of the concrete. This system simultaneously achieves rapid water inrush sealing, dynamic pressure balance, and high-quality bottom sealing, solving the problems of poor sealing time, poor process connection, and difficulty in controlling the quality of underwater concrete in traditional processes.

This invention relates to a cable splicing device, belonging to the field of cable connection. It includes a first splicing shell, a second splicing shell, and a first insert and a second insert connected inside the first and second splicing shells. The first insert connects to the second insert, and the first insert is fixed via a mounting flange and a first adjusting flange. The second insert is fixed via a second adjusting flange and a mounting base. The tails of the first and second inserts are connected to pigtails. The first insert, the connector connected to the first insert, the second insert, and the connector connected to the second insert are all housed within the cavity connecting the first and second splicing shells. The tails of the first and second splicing shells are connected to a locking mechanism. This invention solves the problem of difficult underwater cable connections and offers the following advantages: it meets the requirements of complex aquatic environments; the internal structure of the cable splicing device is novel, enabling multiple watertight protections; redundant safety design improves construction reliability; and the locking mechanism ensures the sealing performance in the underwater environment.

The present application relates to the technical field of tunnel engineering, in particular to a kind of soft weak surrounding rock shallow-buried unsymmetrical pressure tunnel portal section excavation method, comprising the following steps: S10, slope excavation tunnel excavation contour line above the natural slope of arch top and support;S20, vertical steel pipe pile is built outside tunnel excavation contour line on the side of mountain;S30, set range in tunnel arch portion is built reinforced concrete arch cap;S40, the slope toe of the reinforced concrete arch cap on the side of mountain that has been excavated and supported is backfilled;S50, build tunnel outside retaining wall;S60, the upper part of the reinforced concrete arch cap is backfilled and counter-pressured;S70, tunnel subsurface excavation and support are carried out.The present application can reduce the disturbance of lower construction to slope, avoid the construction risk of dangerous deep foundation pit engineering, improve construction reliability, speed up construction progress and protect ecological environment.

The invention relates to the technical field of boiler accessory equipment, and discloses a smoke exhaust device and biomass boiler equipment. The smoke exhaust device comprises a connecting body, an air inducing assembly and a smoke exhaust pipe. The connecting main body is communicated with an exhaust pipe of the furnace body, and a mixing cavity is formed in the connecting main body; the air inducing assembly is arranged on the connecting main body and is communicated with the mixing cavity; one end of the smoke exhaust pipe communicates with the mixing cavity, and the air inducing assembly is suitable for introducing high-speed jet air into the mixing cavity so that smoke entering the mixing cavity from the exhaust pipe can be exhausted from the smoke exhaust pipe. The air inducing assembly and the smoke exhaust pipe are arranged on the connecting body, after the air inducing assembly is started, high-speed jet flow air is introduced into the mixing cavity, the high-speed jet flow air flows out of the smoke exhaust pipe, negative pressure is formed in the mixing cavity, and smoke enters the mixing cavity from the smoke exhaust pipe. According to the smoke exhaust device, high-temperature smoke of the furnace body is prevented from entering the air inducing assembly, so that the construction reliability is improved, normal operation of the air inducing assembly is guaranteed, and the safety is improved.