52results about How to "Reduce construction joints" patented technology

The invention discloses a tunnel underground excavation and lining constriction trolley and a tunnel underground excavation and lining construction method. The tunnel underground excavation and lining trolley comprises a trolley support system and a trolley formwork system; the trolley support system comprises a support system frame, a vertical hydraulic device, an upper vertical pole, a horizontal hydraulic device and a horizontal pole; the trolley formwork system comprises a formwork system frame, a jacking hydraulic oil cylinder, a longitudinal beam, a chord member and a formwork adjusting lead screw. According to the tunnel underground excavation and lining constriction trolley and the tunnel underground excavation and lining construction method, a CRD construction method is effectively improved, by means of the trolley support system, a temporary support system can break median lamella and an inverted arch in one time, the construction period is greatly shortened, and the construction cost is saved; secondary lining is achieved through one-time steel bar binding and pouring, construction joints caused by multiple formworking are reduced, water seepage hidden danger is reduced, and the strength of secondary lining, the smoothness of the outer surface and the overall flatness of concrete are guaranteed.

The invention discloses a construction method of a sliding formwork for a large-diameter silo. The construction method comprises the steps that 1, silo wall steel bar mounting is conducted; 2, slidingformwork mounting and debugging are conducted; 3, concrete pouring is conducted; 4, sliding formwork lifting is conducted, wherein tank wall sliding formwork lifting is divided into three stages, namely primary sliding, normal sliding rising and tank wall top formwork sliding rising; 5, concrete pouring and sliding formwork lifting are repeated till the silo wall sliding formwork is completed; 6,sliding formwork device dismantling is conducted; and 7, concrete curing is conducted. According to the construction method, only one set of formworks is used, the formworks and an operating platformare lifted through a hydraulic jack, formwork supporting and scaffold setting up are not needed any longer, and thus the formworks, scaffold materials and manual work can be greatly saved; continuousoperation is kept during construction, various working procedures are simplified, the sections of the formworks do not need to be mounted and dismounted completely, and thus the construction speed ishigh; and concrete adopts continuous pouring, construction joints can be reduced, and integrality of a building can be ensured.

The invention discloses a complete set of tunnel mechanical equipment, which specifically refers to an excavation trolley (or an excavation gantry), a drainage and steel bar binding trolley, a liningtrolley, a spray maintenance trolley, a ditch cable trough trolley, an inverted arch self-propelled hydraulic trestle and a wet spray manipulator, referred to as five trolleys, one trestle and one wetspray machine. A construction organization method matched with the complete set of mechanical equipment comprises the following construction organization steps: S1, hole excavation; S2, initial support; S3, inverted arch lining; S4, arched wall lining; S5, ditch cable troughs and the complete set of mechanical equipment. The construction organization method is reasonable, effectively improves tunnel management effect, improves construction operation environment, ensures construction safety and quality, improves construction progress and is worthy of promotion.

The invention discloses a method for beyond-limit arch replacing construction during preliminary bracing of a large-section loess tunnel. The method includes the steps of firstly, conducting radial grouting reinforcement on an arch wall, wherein radial grouting reinforcement is conducted on an arch replacing required section where arch replacing is required in the constructed loess tunnel from back to front; and secondly, conducting arch replacing construction, wherein a reinforced preliminary bracing structure in the arch replacing required section is detached, and preliminary bracing construction is conducted on the arch replacing required section synchronously in the detaching process. The method is simple in step, reasonable in design, simple in construction and good in use effect; theradial grouting reinforcement is conducted on the arch wall to reinforce the arch wall of a tunnel hole first, so the structural stability of the tunnel in the arch replacing process is ensured; segmented reinforcing is conducted on the preliminary bracing structure of the tunnel through a plurality of sleeve arch units for a reinforced sleeve arch in the arch replacing required section, so detaching is convenient; and moreover, the sleeve arch units are complementary and together improve the supporting force, so the adverse effects on the structural stability of the tunnel in the detaching process of each sleeve arch unit can be effectively reduced, and the safety and reliability of the arch replacing construction process are ensured.

The invention discloses a large-section loess tunnel supporting system and a supporting construction method. The large-section loess tunnel supporting system comprises a tunnel forepoling structure, atunnel initial supporting structure and a tunnel secondary lining. The upper surface of an inverted arch secondary lining in the tunnel secondary lining is a horizontal plane, and an inverted arch backfill layer is arranged on the horizontal plane. The supporting construction method comprises the following steps of firstly digging a tunnel and conducting initial supporting; and secondly constructing the secondary lining and backfilling the inverted arch. The large-section loess tunnel supporting system is reasonable in design, easy and convenient to construct, high in construction efficiencyand good in use effect, the tunnel forepoling structure, the tunnel initial supporting structure and the tunnel secondary lining constitute a combined supporting system to stably and reliably supportthe large-section loess tunnel, the upper surface of the inverted arch of the secondary lining is adjusted to be a horizontal plane, the construction process of the inverted arch of the tunnel can beeffectively simplified, and the rigidity of the inverted arch of the tunnel is greatly improved; in this way, the construction efficiency of the tunnel secondary lining is improved, the ring sealingtime of the tunnel secondary lining is shortened, the integrity of the tunnel secondary lining is higher, and the overall force bearing effect is better.

The invention discloses a construction method of a loess tunnel entrance section through a landslide mass. The method comprises the following steps that 1, an entrance soil layer is pre-reinforced; 2,a tunnel entrance is constructed; 3, excavation and initial support construction is conducted on the reinforced tunnel section; 4, a reinforced tunnel section base is reinforced; 5, the reinforced tunnel section is subjected to secondary lining construction; 6, excavation and initial support construction is conducted on a rear side tunnel section; and 7, the rear side tunnel section is subjectedto secondary lining construction. The method is reasonable in design, simple and convenient to construct and good in use effect, cement-soil mixed piles are adopted for pre-reinforcement before excavation, a construction process of the tunnel entrance section through the landslide mass is guaranteed to be safe and reliable, meanwhile, the tunnel entrance section is excavated by adopting a three-step excavation method, the reinforced tunnel section base is reinforced, an excavation process of the tunnel entrance section through the landslide mass can be guaranteed to be safe and reliable, in addition, the influence on the stability of a soil layer on the circumferential side of the tunnel entrance is small, and the stability of the excavated and formed tunnel entrance can be effectively improved.

The invention discloses a tunnel portal section pre-reinforcement and excavation construction method based on partition blasting. The construction method comprises the following steps of 1, precipitation pre-reinforcement; 2, earth surface pre-reinforcement, and specifically, reinforcing the surface of a backfill section in a construction tunnel portal section through adopting a cement soil stirring pile; and 3, tunnel excavation construction, and specifically, carrying out excavation construction from rear to front in a plurality of excavation sections, wherein the process comprises the following steps of surveying and setting out, performing drilling and blasting construction, excavating an upper portal body, excavating a middle portal body and excavating a lower portal body. The construction method is reasonable in design, simple and convenient in construction and good in use effect; the underground water level is reduced through precipitation pre-reinforcement, and then surroundingrock is effectively reinforced; after the backfill section is subjected to surface pre-reinforcement through using the cement soil stirring pile, a three-step synchronous excavation mode is used forcarrying out partition blasting excavation, so that it is ensured that the tunnel excavation process is safe and reliable and a tunnel structure is stable.

The invention discloses a tunnel construction method for passing through the boundary stratum of earth and stone. The tunnel construction method comprises the following steps: I, excavation of a reartunnel segment and initial supporting construction; II, excavation of a middle tunnel segment and initial supporting construction; III, excavation of a front tunnel segment and initial supporting construction, wherein the rear tunnel segment, the middle tunnel segment and the front tunnel segment are all three-step synchronous excavated tunnel segments; and in the process of excavation from rear to front, constructing the secondary lining of the tunnel on the inner side of the initial supporting structure of the constructed tunnel from rear to front. The tunnel construction method has the advantages of reasonable design, simple construction and good use effect. The tunnel construction method selects an appropriate drilling and blasting method according to the position relationship betweenthe earth and stone interface and a tunnel hole, adopts a three-step synchronous excavation way to carry out blasting excavation, can ensure the safe and reliable excavation process of the tunnel passing through the boundary stratum of earth and stone, and can ensure the stable structure of the tunnel. Moreover, in the excavation process, the initial supporting structure and the secondary lining of the tunnel are adopted to provide stable and reliable supporting for the large-section tunnel.

The invention discloses a through landslide body loess tunnel construction method. The through landslide body loess tunnel construction method comprises the following steps of constructing a tunnel entrance section and a tunnel exit section simultaneously; and respectively constructing an inclined shaft auxiliary construction inlet section and an inclined shaft auxiliary construction outlet section through a tunnel inclined shaft when the tunnel entrance section and the tunnel exit section are constructed. The through landslide body loess tunnel construction method is reasonable in design, convenient to construct and good in using effect; the loess strata in the construction area where the tunnel entrance section is positioned is subjected to reinforcement treatment by using a cement soilmixing pile in advance before excavation, and the reinforcement length and the reinforcement depth are effectively limited; a loose soil body on a hole body of a tunnel hole is solidified in advance so as to ensure the safety and reliability of the construction process of a hole inlet section of the through landslide body loess tunnel; meanwhile, in the construction process of the tunnel by adopting a three-step excavation method, the construction process of track plates is completed synchronously, so that the construction process of the loess tunnel can be completed easily, conveniently and quickly; and the stability of an excavated and formed tunnel hole can be effectively improved.

The invention discloses a construction method of a soil-stone boundary tunnel passing through loess valleys. The construction method comprises the following steps of 1, precipitation pre-reinforcement; 2, excavation construction of a rear side tunnel section; 3, excavation construction of a middle tunnel section; and 4, excavation construction of a front side tunnel section, wherein the middle tunnel section and the front side tunnel section are three-step synchronous excavation tunnel sections; and in the excavation process from back to front in the step 2, the step 3 and the step 4, primarysupport is synchronously carried out on the excavated tunnel from back to front, and secondary lining of the tunnel is constructed on the inner side of the constructed and formed tunnel primary support structure from back to front. The construction method is reasonable in design, simple and convenient to construct and good in use effect, the underground water level is reduced through precipitationpre-reinforcement, surrounding rock is effectively reinforced, then blasting excavation is carried out in a three-step excavation mode, so that the excavation process of the soil-stone boundary tunnel passing through the loess valleys can be ensured to be safe and reliable, and the stability of the tunnel structure can be ensured.

The invention discloses a construction desk frame for a large-cross-section hole type spillway, and the construction desk frame comprises a desk frame main body (1). Side wall templates (2) are arranged on two sides of the desk frame main body (1) and are mutually connected through a first adjustable push rod (4); chain hoists (3) are arranged at the top of the two sides of the desk frame main body (1); a material distributing device (6) is arranged on the upper surface of the desk frame main body (1); a crown desk frame (7) is arranged at the upper part of the desk frame main body (1); a crown template (8) is arranged on the upper surface of the crown desk frame (7); a crown moving device (9) is mounted between the crown desk frame (7) and the desk frame main body (1); and a sliding waking device (5) is further arranged at the lower part of the desk frame main body (1). By using the construction desk frame for the large-cross-section hole type spillway, the construction of a super-large-cross-section hydraulic grotto is carried out; the operation is flexible; the interference to other working procedures is deceased; the in-position movement is simple and easy; and the working strength is decreased. On the aspect of lining quality, furthermore, a purpose-made large-sized steel template is adopted; the rigidity and the smoothness of the template are guaranteed; construction joints are reduced; and the guarantee of meeting a hydraulic concrete lining high standard is provided.

The invention discloses a deep-buried loess tunnel deformation control construction structure based on a cover arch and a method. The structure comprises a tunnel primary support structure body for primary support of a tunnel and the reinforcement cover arch arranged on the inner side of the tunnel primary support structure body, wherein the tunnel primary support structure body and the reinforcement cover arch form a reinforced primary support structure body. The method comprises the following steps of 1, carrying out tunnel excavation and primary support; and 2, carrying out reinforcement arc arch construction. The structure and the method have the advantages of being reasonable in design, simple and convenient in construction and good in use effect, the reinforcement cover arch is adopted to reinforce the tunnel primary support structure body and form the reinforced primary support structure body, an isolation layer is arranged between the reinforcement arc arch and the tunnel primary support structure body, in addition, the reinforcement cover arch adopts a plurality of cover arch units to reinforce the tunnel primary support structure body in a segmented mode, so that the construction is simple and convenient, moreover, the reinforced primary support structure body formed by construction has certain self-adaptive capacity and can effectively adapt to the deformation condition of soil mass on the peripheral side of the tunnel, and therefore the deformation resistance of the reinforced primary support structure body can be effectively enhanced.

A large-span arch bridge hollow box room cast-in-situ arch ring formwork system and its construction method, the formwork system includes a formwork structure, a supporting frame body and an arch ring, a formwork structure bottom formwork and bottom formwork keel, and a cover formwork and cover formwork keel, cover The formwork includes a fixed pre-positioned formwork unit and a movable post-positioned formwork unit, and the cover formwork keel includes a pre-positioned keel unit and a rear-positioned keel unit. The side walls of the leading edge and the trailing edge are oblique surfaces that are adapted to and closely attached to. The construction method includes the steps of factory processing of cover formwork, construction of bottom formwork, construction of cover formwork, and pouring of concrete. The invention has simple construction and convenient operation, and good appearance quality of structural concrete, and can be applied to concrete pouring of the bottom plate and roof plate of cast-in-place box-shaped arch ring structures, and is also suitable for formwork systems of other cast-in-place large-scale reinforced concrete structures with steep slopes.

The invention discloses a construction method of a shallow-buried tunnel in a loess gully. The construction method comprises the following steps: 1, grouting a sleeve valve pipe for advancing reinforcement: carrying out sleeve valve pipe grouting for reinforcement on a stratum in the construction area of the constructed shallow-buried tunnel; 2, carrying out tunnel excavation and preliminary bracing; and 3, constructing a second lining. The construction method is simple in step, reasonable in design, simple and convenient in construction and excellent in using effect; the sleeve valve pipe isadopted and a plurality of rows of grouting holes are adopted to grout the reinforced stratum for reinforcement; the range of the reinforced stratum is specifically limited; both the tunnel hole bodyand the tunnel base can be reinforced, and the reinforcement effect is reliable; the shallow-buried tunnel construction method is particularly suitable for advancing reinforcement and excavation construction of the shallow-buried tunnel section which is positioned in a loess gully and is adjacent to an earth and stone interface, and the earth's surface of the shallow-buried tunnel is a silting-upland layer. The construction method can effectively ensure safety and reliability of the excavation process of the shallow-buried tunnel in the loess gully, can effectively improve the stability of the excavated tunnel hole and can effectively improve the bearing force of the tunnel base.

The invention discloses a prefabricated and assembled circular inspection well in the technical field of inspection wells, in which the base and the well chamber are integrated. Sedimentation chamber, the base of this kind of inspection well is an integral structure with the sludge sedimentation chamber and the lower well chamber, which reduces a construction joint, while the lower well chamber, water inlet pipe and outlet pipe are an integral structure, which reduces construction joints and increases inspection. The tightness of the well, the setting of the base suspension rings on both sides of the base and the upper well chamber suspension rings on both sides of the upper well chamber make the inspection well have a stress-bearing place when the crane is installed, and the installation is very convenient. The setting of the silt sedimentation chamber makes the water flow When the silt can settle down, the inspection well has simple structure, convenient maintenance, convenient hoisting operation, shortens the construction period and saves the cost.

The invention discloses a construction method for canceling a settlement post-cast strip in jump warehouse operation. The construction method comprises the following specific implementation steps: 1,defining various conditions of a building field; 2, establishing a calculation model; 3, calculating settlement and a foundation internal force of each node; 4, performing collaborative calculation analysis step by step; 5, analyzing whether settlement meets a design requirement or not, and if not, carrying out foundation treatment; and 6, performing running water interval division on a construction section. According to the invention, the settlement of the building is calculated, and the settlement which does not meet the requirements is subjected to foundation treatment so that the sequential implementation of a subsequent jump warehouse method is ensured, and the design and construction requirements are met; a settlement post-cast strip is omitted, one-time casting forming is achieved,a later-period plugging procedure can be reduced, and a construction period can be shortened; the settlement post-cast strip is omitted, construction joints are reduced, the construction joints are convenient to clean, and an integral structure is formed as soon as possible; and in addition, a site space, the construction time and the construction cost can be greatly saved.

The invention discloses a method for secondary grouting in an equipment foundation construction process. The method specifically includes the steps that an external formwork of an equipment foundationis installed at the top elevation of secondary grouting; PVC angular lines are installed on a top plate of the external formwork; a groove is formed in the inner side of the equipment foundation to serve as an equipment foundation grouting groove according to the grouting height required by a construction drawing; large-volume concrete water-storage curing is performed through the equipment foundation grouting groove; formwork removal and rough chiseling are performed after the curing period; equipment installation, correction and acceptance check are performed; and after equipment installation passes acceptance check, the equipment foundation grouting groove is cleaned, and secondary grouting is performed to fill and level up to the designed elevation. By means of the method for secondary grouting in the equipment foundation construction process, a secondary grouting formwork installation procedure is omitted, and the appearance technique is improved; and the working efficiency is improved, the number of procedures is reduced during foundation construction, secondary grouting is directly performed in the equipment foundation grouting groove, a formwork erecting procedure of the secondary grouting is omitted, cleaning can be completely performed after equipment is put in place so that secondary grouting operation can be performed, and then time is saved for equipment installation.

The invention discloses a large-section tunnel excavation and support construction method for crossing a soil-rock boundary stratum. The method comprises the following steps of first, upper middle step excavation and initial support construction, specifically, carrying out upper step excavation and initial support construction on a construction tunnel by a plurality of excavation sections from rear to front, and when any excavation section is subjected to upper step excavation and initial support construction, the process comprises the following steps of measuring pay-off, drilling and blasting construction, excavation and initial support of an upper cave, and excavation and initial support of a middle cave; second, lower step excavation and initial support construction; and third, carrying out secondary lining construction. The method is reasonable in design, simple and convenient to construct and good in use effect, the upper blasting area in the upper step and the middle blasting area on the middle step are separately subjected to blasting zone division, the arrangement position of each shot hole in each blasting zone is defined, the collapse of a tunnel face or the collapse ofa vault caused by large vibration generated by blasting when one-time loading of the large section is excessive can be effectively prevented, the safety and reliability of the tunnel excavation process are ensured, and the stability of the tunnel structure is ensured.

The invention discloses gallery underground cavity high side wall construction equipment. The equipment comprises a lifting slide mold construction device, a wall top pull fixing device and a placingdevice; the lifting slide mold construction device comprises a truss construction platform; the truss construction platform is built between two side walls of a cavity; slide molds are arranged on twobackup wall sides of the truss construction platform; vertical guide rods are arranged between the slide molds and near side walls; climbing rod type hydraulic jacks sleeve the vertical guide rods; the truss construction platform is fixedly mounted on each climbing rod type hydraulic jack; when the tops of the side walls are constructed, the hung truss construction platform is tensioned by the wall top pull fixing device; and after the tops of the side walls are constructed, the truss construction platform is put down by the placing device. A construction method comprises the steps of building of the lifting slide mold construction device, casting of side wall concrete, mounting of the wall top pull fixing device, placement of the truss construction platform and shifting of the truss construction platform to adjacent construction places; and the steps are repeated. The construction equipment and the construction method have the advantages of safe operation, high construction efficiency and good construction quality.