61results about How to "Improve engineering safety" patented technology

The invention provides an integrated management and control system integrating simulation technology, cooperative work, knowledge management and project management. The system is characterized by comprising an infrastructure unit, an engineering project management unit, a cooperative work unit, a simulation analysis unit and a knowledge management unit. According to the system, by virtue of a BIMtechnology and a management system, the engineering construction capability is improved through an engineering project construction capability improvement platform system.

The invention relates to an arrangement method of an ecological gabion chamber revetment type, and belongs to a revetment structure type in river training works. A stepped sandstone cushion layer is laid on the revetment of a river; a sinuous ecological gabion chamber is arranged on the stepped sandstone cushion layer; and plants are planted in the sinuous ecological gabion chamber. The arrangement method has the advantages of novel structure, reliable operation, wide application range, capabilities of improving the engineering safety and favorably improving water eco-environments of rivers and lakes and great application prospect.

The invention relates to a twice spreading prestressing force anchor tool that can make the middle or short prestressing force tendon take twice spreading. The invention is made up of sole plate, bearing nut, anchor circle and clamping piece. That can anchor fix 1-20 prestressing steel strand and high intension steel bundle. It can be widely used for anchor fixing the prestressing force tendon of road and bridge, railway girder, and so on.

The invention discloses a sealed and watertight method between a box body and a pile body; the waterproof method is used for sealing and watertightness between the pile body and the box body. The invention is characterized in that: with the method, an annular airbag is arranged in a gap between the box body and the pile body; further an annular airbag groove is made on the pile hole sidewall of the soleplate of the box body; when the annular airbag is placed, the annular airbag is put in the annular airbag groove; the watertight method of the invention is simple in operation, reliable in watertightness and suitable for watertightness under various environmental conditions; in particular the invention adopts the technical proposal, no matter how partial difference between the positions of the pile body and the hole, the airbag can realize the complete watertightness as the own property of the airbag; therefore, underwater construction can be carried out without needing divers, thereby greatly shorting the construction period, improving the quality and safety of the construction, saving the construction cost and avoiding the pollution to a construction water area.

A full-assembly pressure-bearing type variable-diameter reinforcement cage expansion head anchor rod pile system comprises a variable-diameter reinforcement cage, a steel bar connector and an anchor rod piece. A limiter is a limiting nut. The limiting nut can be of an open or closed structure and the like. The variable-diameter reinforcement cage is limited by the limiting nut and a bottom plate anchor nut to the anchor rod piece (defined position). The anchor rod piece adopts finish rolling or common threaded steel bars. The steel bar connector is used for the length connection of the steel bar end portions of the anchor rod piece. The top of the anchor rod piece and a bottom plate are anchored, and the bottom of the anchor rod piece and the expansion head reinforcement cage, namely the variable-diameter reinforcement cage, are anchored; the variable-diameter reinforcement cage is provided with a restraining and releasing device, and a concrete or cement mortar crystalline portion iscombined with the expansion head variable-diameter reinforcement cage and an axial rod to form the variable-diameter reinforcement cage expansion head anchor rod pile system; and the variable-diameterreinforcement cage expansion head anchor rod pile framework system is fully assembled.

The invention relates to a shaft with the combined arrangement of an underground powerhouse cable line outgoing system and an air exhausting system, and belongs to the shaft structure field in the water conservancy and hydropower engineering. An underground powerhouse cable shaft and an air exhausting shaft are combined into a big well, the big well simultaneously has functions of cable line outgoing, air exhausting and transporting, and the inside of the shaft is divided into a plurality of functional spaces: an elevator shaft, the front chamber of the elevator, a staircase, a high-pressure cable well, a low-pressure cable shaft, a positive-pressure air feeding well, a cable accident smoke discharging well and the like. The shaft has the advantages that the floor space of the ground is reduced, thereby being favorable for environment protection and water and soil conservation, and conforming to the ecological construction purpose advocated by the nation.

This invention relates to an aeration device of a flat-bottomed building to aerate with a combined way of raised ridge, aeration tank and a drop ridge and sets a paste ridge at the back of the tank, in which the profile line of the top of the paste ridge extends to the bottom from the top gradually along the counter flow direction in a cavity sphere, the profile line on top of the paste ridge along the current direction extends to the bottom from the top gradually at the bump section of the current and the paste ridge at the back of the cavity. Advantage: obliquity of the jet with the paste ridge is small across a ventilation tank, it's not easy to generate back flow to block the cavity, a stable cavity is formed at the flow surface of the building to reduce back flow and increase aeration efficiency, extra part is removed to improve distribution of pressure in the cavity to increase contact area of water and gas.

The invention discloses a numerical analysis method for stability of a pole tower base on unsaturated expansive soil foundation. According to the method, firstly, a pole tower base model and an unsaturated expansive soil foundation model are created; secondly, corresponding material properties are set for the pole tower base model and the unsaturated expansive soil foundation model respectively; thirdly, correlative analysis procedures are established, grid partition is carried out on the pole tower base model and the unsaturated expansive soil foundation model, boundary conditions for constraining the displacement of the bottom and the periphery of the unsaturated expansive soil foundation model are set, and gravity load and corresponding load on the upper portion of the pole tower base model are applied; finally, operation is submitted, and an operation result is analyzed. The method easily and effectively solves the problems that the pole tower base of an electric transmission lineis deformed and the stability is influenced since the water content rate of the unsaturated expansive soil foundation is changed; the bearing force of the unsaturated expansive soil foundation after the water content rate is changed can be obtained, and the numerical analysis method is provided for determining the stability of the pole tower base on the unsaturated expansive soil foundation.

The invention relates to the technical field of permeability performance test of geotextile, in particular to an experiment device for testing a vertical permeability coefficient of multi-layer geotechnical cloth. The experiment device comprises a base, wherein a water tank is fixedly arranged at a top end of the base, vertical racks are fixedly arranged at a bottom end of an inner wall of the water tank, a permeation box is fixedly arranged at top ends of the vertical racks, geotechnical cloth placement racks are fixedly arranged at a bottom end of an inner wall of the permeation box, rubbersealing rings are embedded to top ends of the geotechnical cloth placement racks, fixed devices are arranged at two sides of the geotechnical cloth placement racks, grooves are formed in the fixed devices and are corresponding to the rubber sealing rings, a current limiting cylinder is fixedly arranged between the two fixed devices, a through hole is formed in a bottom end of the current limitingcylinder, a water inlet pipe communicates with a top end of the current limiting cylinder, a seepage hole is formed in a bottom end of the permeation box, the other end of the water inlet pipe communicates with a water outlet end of a water pump, and a water inlet end of the water pump communicates with a water storage boxy. The experiment device has the characteristics of high experiment accuracyand high practicability.

The invention discloses a vertical lifted and dropping elevator which uses the hydraulic drive and is designed according to a ship lock water delivery theory, and the elevator is different from a motor drive theory. The elevator comprises an elevator cage, a sliding wheel system and a steel wire rope and further comprises vertical wells arranged on two sides of an elevator well in the depth direction of the elevator well, float bowls arranged in the vertical wells and an impounding reservoir communicated with the vertical wells through a water filling pipeline and a water releasing pipeline, the water filling pipeline is connected with a water filling pump, and a water releasing valve is arranged on the water releasing pipeline; when a water input system arranged at the bottom of the elevator fills and release water to the vertical wells, the counterweight movement is driven to drive the cage to operate, and water used in a hydraulic system is from the impounding reservoir arranged on the lower portion of an elevator system. Compared with the traditional ship elevating machine, the elevator can save more energy, the environment is protected, and the safety of the elevator operation is improved.

The invention discloses a carbon dioxide circulation calcium sand foundation strengthening method. The method mainly comprises the steps of calcium bicarbonate preparing through calcium sand acidification, calcium bicarbonate well drilling injection, water recycling and cyclic utilization and the like. According to the method, for the characteristic that the bearing performance of the calcium sandfoundation met in the island development process is low, in combination with the problems that in the island development process, material taking is not convenient, and the transportation cost is high, the island resource and waste resources are sufficiently utilized, and the foundation machining method in which materials are locally taken and waste is utilized is achieved. According to the method, construction of the calcium sand type foundation islands can be better promoted, and good application prospects are achieved.

The invention belongs to the technical field of civil construction engineering materials, and particularly relates to green and low-carbon foam light soil prepared by using carbon dioxide and magnesium oxide as raw materials. The carbonized foam light soil is prepared from the following raw materials in parts by weight: 10 to 200 parts of magnesium oxide, 10 to 100 parts of a filler, 2 to 45 parts of CO2 bubble group and 20 to 400 parts of water. According to the invention, based on the problems of large carbon emission and serious energy consumption caused by a cement curing agent used by traditional bubble mixed light soil, the invention aims to provide a novel bubble mixed light soil operation method, so that a foundation treatment technology is promoted to be converted from high pollution and high energy consumption to low carbon, environmental protection and sustainable conversion, and the light soil is prepared by taking magnesium oxide as a curing agent and carbon dioxide gas as a raw material of bubbles.

The present invention provides a system of utilizing light rays having angles therebetween to monitor displacement change. The system is characterized by comprising a light ray emitter, a light ray reception target, a data acquisition unit and a remote server, wherein the light ray emitter can emit three beams or multiple beams of light rays having angles therebetween, the light ray reception target is arranged at a monitoring point, and the light ray emitter is arranged at a stable position having a certain distance with the light ray reception target, so that the three beams or multiple beams of light rays having the angles therebetween and emitted by the light ray emitter can irradiate on the light ray reception target directly. The light ray emitter and the light ray reception target are connected with the data acquisition unit via a wireless local area network, the data acquisition unit transmits the displacement change condition to the remote server, and the remote server can store and analyze the data, and carries out the early warning on a monitoring value exceeding an engineering allowable value. The system and method of the present invention can realize the real-time monitoring and the early warning automation, enable the engineering safety to be improved and the personal error to be reduced, are high in monitoring precision and wide in monitoring range, and are convenient to popularize.

The invention relates to a plastering omitting process for a shear wall structure. The plastering omitting process includes steps of 1) constructing a shear wall, wherein construction thickness ranges from 140mm to 300mm, the inner side and the outer side of the wall part of 10-15cm in width at the joint of the shear wall and a filling wall are subjected to reduction of one plastering thickness of 20-25cm; 2) building and constructing the filling wall, wherein the thickness of brickwork is 40-50mm smaller than that of the shear wall, the center of the shear wall is aligned to the center of the filling wall when the filling wall is built, gaps of 20-25mm are reserved on the inner side and the outer side of the filling water respectively; 3) adhering, to be specifically, the joints of the wall are adhered by a cracking net 20-30cm in width; 4) plastering the brickwork of the filling wall, and plastering and leveling a thickness-reduced part of the wall. The plastering omitting process of the shear wall structure has the advantages that dead weight of the wall is reduced, and engineering safety is improved; plastering workload is reduced, decoration and construction time is shortened, resources are saved, common quality problems such as cracks of the plastered inn wall are effectively reduced, and economic and social benefits are increased.

The invention discloses an engineering pile guiding device during piling construction and a using method of the engineering pile guiding device during piling construction. The engineering pile guidingdevice comprises a lower platform, telescopic positioning columns and connecting rods, wherein the telescopic positioning columns are arranged at the four corners of the bottom end of the lower platform, barbs are arranged on the two side walls of each telescopic positioning column, and a second through hole is formed in the lower platform. The engineering pile guiding device during piling construction and the using method of the engineering pile guiding device during piling construction have the beneficial effects that by arranging the telescopic positioning columns, the length of each telescopic positioning column can be freely adjusted according to the environment in a seabed, the drilling depth of positioning holes does not need to be consistent in a drilling mode, the early-stage workload is reduced, and the functionality of the device is improved; by arranging a left hydraumatic rod, a right hydraumatic rod and a dial, workers can conveniently know the offset of a positioning sleeve, then it can be guaranteed that the positioning sleeve is vertically lowered, the perpendicularity of a cement pile is guaranteed, and the engineering safety is improved; and by arranging an upper air cylinder and a lower air cylinder, the positioning sleeves of different specifications can be locked and fixed, and the practicability of the device is improved.

The invention provides a long-distance continuous measurement method for soil body strength parameters of a soft soil site. The front end of a dragging device is provided with a soil body non-drainingshear strength measurement device, the dragging device actively or passively travels in a soft soil layer, it is guaranteed that a part of the dragging device penetrates into the to-be-measured soillayer during travelling, and the soil entering depth of the dragging device is controlled by adjusting a counterweight on the upper part of the dragging device and the dragging angle. According to theprovided method, the limitation that through a traditional single-point vertical measurement method, the continuous soil body strength parameters in the surface parallel direction cannot be obtainedis broken through, transverse long-distance continuous field measurement of the soil body strength can be completed through a one-time dragging test, and the measured strength parameters can be used for guiding design and construction of breakwater projects and projects such as submarine oil and gas pipelines, cables and optical cables. Especially, with the increasing development of deep-sea oil and gas resources, through the provided method, it is of great significance to measure the submarine soil body strength parameters and apply the submarine soil body strength parameters to design and stability evaluation of project facilities such as the submarine pipelines and the submarine cables.

The invention relates to a flexible DC converter valve AC connecting line single-phase earth fault protection system and method. The method comprises the following steps that 1) an earth fault is detected according to flexible DC converter protection or valve control; (2) the fault converter valve is locked, and information is sent to pole control; 3) the pole control sends the information to the pole protection, and comprehensively judges the protection action condition; (4) only 800kV pole differential protection action is performed, and the whole pole is locked and stopped immediately; 5) whether converter protection or valve control imbalance protection is earlier than 400kV low-end valve group differential protection or not is judged; (6) a fault VSC converter valve is stopped firstly and a non-fault VSC converter valve is stopped in a delayed mode by means of flexible direct current converter protection or valve control imbalance protection action information; (7) on the basis of the 400kV low-end valve group differential protection action information, the fault VSC converter valve is stopped firstly, and the non-fault VSC converter valve is stopped in a delayed mode; and 8) the protection action process is ended. The system and method can be widely applied to the field of power grid safe operation.

The invention discloses a mounting structure and a mounting method of a deep well pump pipe in a civil air defense room of a comprehensive building. the pump pipe passes through a pump pit and entersa deep water well. The bottom of the pump pipe is connected to a water pump. A well head bearing frame, a second bottom plate and holt hoop iron above the second bottom plate are arranged in the pumppit. The holt hoop iron has two halves. The two halves of the holt hoop iron are connected to each other by bolts, and one of the two halves is welded to the second bottom plate. Anti-sway spring mechanisms are connected to the upper and lower ends of the water pump. The mounting structure and mounting method solve the problem in the prior art that the diameter of the well head of a deep well pumpin a civil air defense room is narrow, a construction work cannot enter to mount a pipeline bracket, and joint welds between a flange and the pump pipe are prone to crack, thereby resulting in high failure rate, short service life and difficult guarantee of water supply performance in the civil air defense room during wartime, improve the structure strength of the pump pipe member for the deep well pump with narrow wellhead diameter in the civil air defense room, make the lifting and assembling flexible and convenient, prolong the running time of the equipment, and save the maintenance cost.

The invention provides a pipeline sleeper used for a reinforced concrete drainage pipeline. The pipeline sleeper used for the reinforced concrete drainage pipeline comprises a sleeper body which is of a frame body structure. The sleeper body comprises a first side plate, a second side plate, a third side plate and a fourth side plate which are sequentially connected end to end, wherein the first side plate and the third side plate are arranged oppositely, and the second side plate and the fourth side plate are arranged oppositely, and a first groove and a second groove which are used for mounting the pipeline are formed in the upper end face of the first side plate and the upper end face of the third side plate correspondingly. The pipeline sleeper is arranged on a foundation where a trench is dug, and then the pipeline is placed in a bearing plate of the pipeline sleeper; using is convenient and fast, the elevation and straightness of the pipeline can be guaranteed, labor intensity is relieved, the construction period is shortened, the construction quality is improved, and construction work is safe; the first strip-shaped groove and the second strip-shaped groove are formed, and the pressure applied to the bearing plate by the pipeline is dispersed onto the two sides of the first side plate and the third side plate, so that the bearing capacity of the pipeline sleeper is improved, and the service life of the pipeline sleeper is prolonged; and the sleeper body is of the frame body structure, so that materials are saved, labor cost is reduced, and the weight of the sleeper body is reduced.

The invention relates to an elastic locking component, an anti-loosening nut and an anti-loosening bolt nut fastener. The elastic locking component comprises an inner spring and an outer spring arranged on the outer portion of the inner spring in a sleeving manner. One end of the outer spring is connected with the same end of the inner spring through an inner and outer spring connecting portion. The turning direction of the outer spring is opposite to that of the inner spring. The anti-loosening nut is used for being assembled with a bolt and is provided with a nut body and the elastic lockingcomponent. The other end of the outer spring is connected with the nut body, and the inner spring can be pressed on and wound around a thread of the bolt. The anti-loosening bolt nut fastener is provided with a pre-tightening sleeve and the above anti-loosening nut. The structure is simple, and the locking performance is good; only the nut body is modified, and the bolt or a fastening workpiece does not need to be modified; and it can be guaranteed that the fastener has good work intensity, and engineering safety can be guaranteed.

The invention relates to an overturning device for vertical-stacked precast concrete wallboards. The overturning device comprises a horizontal base and a steel baffle plate; a certain included angle is formed between the horizontal base and the steel baffle plate; the horizontal base and the steel baffle plate are fixedly connected through a triangular support frame; a reinforcing steel arm and the triangular support frame are across arranged, and are fixedly connected through bolts; the lower end of the reinforcing steel arm is fixedly connected with the bottom of the steel baffle plate; fixed bolts for pressing precast concrete wallboards to be overturned to the inner sides and with adjustable pressing degree are pairwise arranged on the steel baffle plate, the reinforcing steel arm andthe horizontal base; and the back part of the steel baffle plate has a certain radian to relieve the impact effect on the steel baffle plate by the weights of the precast wallboards and the overturning device in the overturning process. The overturning device improves the scene overturning efficiency of the precast wallboards, prevents the damage problem in scene overturning of the precast wallboards, has the characteristics of high lifting speed and guarantee of the integrity of the wallboards, guarantees the quality of the wallboards, and improves the engineering efficiency and the safety.

The invention provides a steel structure high-altitude welding cage-type closed environment operation platform and a using method thereof, and belongs tothe technical field of building engineering.Acolumnar steel structure is sleeved with an annular plate, a bottom annular platform, a top annular platform and an inner sleeving ring from bottom to topsequentially; the annular plate is fixedly connected with an outer eave of the bottom annular platform by lower inclined rods; an outer eave of the top annular platform is fixedly connected with the inner sleeving ring by upper inclined rods, and the upper inclined rods are distributed in the circumference of the top annular platform and the inner sleeving ring at equal intervals; inner rings of the bottom annular platform and thetop annular platform are fixedly connected by inner vertical rods, outer rings of the bottom annular platform and the top annular platform are fixedly connected by outer vertical rods and diagonal braces, and the inner vertical rods, the outer vertical rods and the diagonal braces are all distributed in the circumference of the bottom annular platform and the top annular platform. Theproblems of high high-risewelding difficulty of the steel structure and increased aerial working risk as the building height increases continuously are solved.

Disclosed is a variable diameter reinforcement cage enlarged head anchor pile system. The system includes an enlarged head reinforcement cage, a reinforcement connector, and an anchor rod which is anaxial rod. A limiter is a limit nut and can be an open or closed structure. A fixer of a shaft in the enlarged head reinforcement cage is limited (at a limited position) on the anchor rod by the limitnut. The axial rod is made of finish rolled spiral reinforcement. The reinforcement connector is used for length connection of the end of the finish rolled spiral reinforcement. The top of the anchorrod is anchored to floor, and the bottom of the anchor rod is anchored to the enlarged head reinforcement cage which is a variable-diameter reinforcement cage. Concrete or mortar crystal parts are combined with the enlarged head reinforcement cage and the axial rod to form the variable diameter reinforcement cage enlarged head anchor pile system.

The invention provides a dry towing transporting float-on process of a floating production, storage and offloading device. The dry towing transporting float-on process of the floating production, storage and offloading device comprises the following steps of 1, doing preparation work before loading of a semi-submerged ship; 2, wetly towing the floating production, storage and offloading device toreach a float-on location; 3, carrying out longitudinal shipment float-on operation on the floating production, storage and offloading device; and 4, carrying out shipment fixing and dry towing transportation on the floating production, storage and offloading device. Under the cooperation of a semi-submerged ship buoyancy tank winch cable and a harbour tugboat, the floating production, storage andoffloading device is towed to be kept stable after being reaching a preset shipment position; by using laser alignment to monitor relative positions of the semi-submerged ship and the floating production, storage and offloading device, the semi-submerged ship floats to support the floating production, storage and offloading device till reaching transporting draft; by welding a shipment fixing piece, the dry towing transporting float-on operation of the floating production, storage and offloading device is finished, and the semi-submerged ship carries the floating production, storage and offloading device to realize dry towing transporting sailing; the floating production, storage and offloading device is transported by using the semi-submerged ship; the working period is shortened, the engineering cost is saved, and the safety is good.

The invention relates to a recycling building cantilever scaffold fixed device and an application method. The recycling building cantilever scaffold fixed device comprises a steel plate, bolts and I-shaped steels. At least one set of the bolts are arranged on the upper end of the steel plate in a vertical mode, and each set of the bolts is composed of the two bolts arranged side by side. The steelplate is pre-embedded in the concrete on the ground of the floor. The I-shaped steels penetrate through the middle of each set of the bolts, angle steels are arranged between the upper end of each set of the bolts to press the I-shaped steels. The gaps between the two sides of the I-shaped steels and the bolts are filled with wooden square strips. The recycling building cantilever scaffold fixeddevice and the application method solve the problems of material waste and poor construction quality in the prior art, and have the characteristics of saving materials, reducing construction cost andimproving work efficiency.

The invention provides a pavement interlayer structure void state detection method and system and a use method thereof. The method comprises the following steps: performing a seismic source excitationstep; to be specific, knocking a pavement by exciting a seismic source to generate an elastic wave; performing an array type data acquisition step; to be specific, collecting elastic wave data generated by the excitation source on the road surface by using detectors arranged in an array; performing a waveform evaluation step; to be specific, removing the noise influence in the elastic wave data,calculating the impact energy of the elastic wave, and evaluating a pavement void state through the impact energy; and performing a three-dimensional model reconstruction step; to be specific, reconstructing a three-dimensional model in a void state. According to the invention, rapid detection and imaging of the void area can be realized; the void position and severity can be visually represented;the integration degree is high; and the method and system are convenient to use.

The invention relates to the field of civil engineering, in particular to a late-added concrete stand column construction method. The late-added concrete stand column construction method comprises the following steps: a lower section of reinforcement is implanted in a stand column construction position on a baseplate; an upper section of reinforcement is connected to an opposite position on a top plate; the lower section of reinforcement and the upper section of reinforcement are connected through a thread joint; a reinforcement skeleton is mounted, and a body part of a stand column is cast; after the body part of the stand column reaches the standard strength requirement, the top of the body part of the stand column is polished; the grouting is performed in an area between the top of the body part of the stand column and the top plate to connect the top of the body part of the stand column with the top plate, so that the difficulty of incapability of tightly connecting the top of the stand column with an original structure in late addition of a concrete stand column in a cast structure is preferably solved, and the engineering quality and the late bearing safety are greatly improved.

The invention relates to a plastering omitting process for a shear wall structure. The plastering omitting process includes steps of 1) constructing a shear wall, wherein construction thickness ranges from 140mm to 300mm, the inner side and the outer side of the wall part of 10-15cm in width at the joint of the shear wall and a filling wall are subjected to reduction of one plastering thickness of 20-25cm; 2) building and constructing the filling wall, wherein the thickness of brickwork is 40-50mm smaller than that of the shear wall, the center of the shear wall is aligned to the center of the filling wall when the filling wall is built, gaps of 20-25mm are reserved on the inner side and the outer side of the filling water respectively; 3) adhering, to be specifically, the joints of the wall are adhered by a cracking net 20-30cm in width; 4) plastering the brickwork of the filling wall, and plastering and leveling a thickness-reduced part of the wall. The plastering omitting process of the shear wall structure has the advantages that dead weight of the wall is reduced, and engineering safety is improved; plastering workload is reduced, decoration and construction time is shortened, resources are saved, common quality problems such as cracks of the plastered inn wall are effectively reduced, and economic and social benefits are increased.

The invention discloses a cross section structure for a rectangular shield tunnel. The cross section structure is formed by sequentially connecting a top inverted arch, a first angle part, a first side wall, a second angle part, a bottom inverted arch, a third angle part, a second side wall and a fourth angle part in series; the fourth angle part is connected with the top inverted arch; all parts define a closed ring; the inner contour and the outer contour of the closed ring are smooth and continuous; the ring width of the closed ring is continuously changed; the ring width positioned in a large-stress area of the tunnel is greater than the ring width positioned in a small-stress area of the tunnel. The applicant provides an idea of variable wall thickness of the rectangular shield tunnel and develops the cross section structure for the rectangular shield tunnel; the ring width positioned in the large-stress area of the tunnel is greater than the ring width positioned in the small-stress area of the tunnel, so that mechanics characteristics of the tunnel are more accurately matched on the premises of not increasing self weight, not wasting the cross section and not influencing an inner use space.