50results about How to "Reduce the amount of backfill" patented technology

The invention discloses a construction and manufacturing process of a total-prefabricated superimposed assembly type underground pipe gallery. A bottom plate of the underground pipe gallery is a prefabricated superimposed bottom plate. A side wall or a side wall and middle wall body is a prefabricated sandwich superimposed wall. A top plate of the underground pipe gallery is a prefabricated superimposed plate. The bottom plate, the side wall or the side wall and middle wall body and the top plate are connected in a cast-in-place manner to form the integrated underground pipe gallery. The shop prefabrication way and the superimposed cast-in-place way are combined, the advantages of the shop prefabrication way and the advantages of the cast-in-place way are fully taken, defects and deficiencies are overcome, especially the defects of low production efficiency and small transportation amount of a traditional prefabricated pipe gallery are overcome, the purposes of template-free cast-in-place construction, environmental protection, material saving, high quality and high efficiency are achieved, and the underground pipe gallery has high water resistance.

The invention belongs to the technical field of tunnel TBM construction and discloses a large-embedded-depth TBM construction tunnel rock burst treatment structure and method. The large-embedded-depth TBM construction tunnel rock burst treatment structure comprises a plurality of advance boreholes formed in the vault area of the working face of a tunnel. The advance boreholes penetrate through the rock burst area. All the advance boreholes are connected through fracture crushed zones formed through presplitting blasting in the boreholes. According to the large-embedded-depth TBM construction tunnel rock burst treatment structure and method, the positions and directions of the boreholes are reasonably arranged in the working face of the tunnel through the operation space in a TBM, the crushed zones of a rock body are formed in the vault and spandrel of the rock burst area through borehole blasting, high-pressure water injection is utilized for further promoting development of crushed zone fractures and softening the rock body, high ground stress in the rock burst area is released, the rock burst risk is eliminated, the whole construction process is safe, efficient, low in cost and good in treatment effect, subsequent borehole high-pressure grouting treatment can be conducted to improve the integrity of the crushed zone fractures of the rock body, the collapse quantity and backfilling quantity of the vault during subsequent TBM excavation are decreased, and remarkable economic and social benefits are achieved.

The invention discloses a supporting construction technology for a deep foundation pit nearby a road on the complicated geological conditions. The technology comprises the following steps of first, carrying out foundation pit excavation to the lithosphere, and carrying out slope setting construction to form a first foundation pit; second, driving first column piles on the edge of the pit bottom ofthe first foundation pit to form first batter post supporting; third, carrying out lithosphere excavation at the pit bottom of the first foundation pit to form a second foundation pit, carrying out slope setting construction, and then carrying out anchor rod supporting; and fourth, driving second column piles on the edge of the pit bottom of the second foundation pit to form second batter post supporting. According to the supporting construction technology for the deep foundation pit nearby the road on the complicated geological conditions, supporting on the deep foundation pit is implementedin the manner of arranging anchor rod supporting between batter post supporting, the problems that supporting for a deep foundation pit nearby the road on complicated geological conditions is difficult to carry out, high in construction cost, prone to having potential safety hazard, and the like are solved, supporting construction of the deep foundation pit nearby the road on the complicated geological conditions can be implemented, and the successful practice experience is provided for the field of supporting construction.

The invention discloses a deep foundation pit open cutting construction method, which is characterized in that vertically knocking steel plate piles are arranged on the inner side of four concrete annular beams under a foundation pit soil outlet, the upper end of the steel plate piles is positioned at the same level as the upper surface of the first concrete annular beam, the lower end of the steel plate piles exceeds the lower surface of the lowest concrete annular beam by a certain length, first step soil digging is started, the first concrete annular beam is constructed, at the time, the steel plate piles are knocked in, then, the second step soil digging is started, and a soil table at a preserved soil outlet is maintained without being dug and is used for locating a digging machine. During the construction of a section of second concrete annular beam under the soil outlet soil table, firstly, earthwork is pulled and dug under the first annular beam, the position of a section of annular beam at the soil outlet is dug, the second concrete annular beam is completed through casting, the construction of each following concrete annular beam can be completely by parity of reasoning, and the soil is dug to the tank bottom. The method of the invention does not need to dig and fill back the earthwork platform at the soil outlet for many times, the construction program is simplified, the earthwork work load is reduced, and the construction cost is saved.

The invention discloses an assembly type lightweight thin wall integrated pipe gallery and a production method thereof. The integrated pipe gallery is produced through casting molding of ultrahigh performance powdery concrete. The ultrahigh performance powdery concrete makes the integrated pipe gallery have a light structure, so various pipelines, cables, optical cables and other products can be safely laid.

A method for wastewater pollution control in a waste mine shaft is characterized in that mine solid wastes, a gelatinizing agent and water are used to prepare a sizing agent according to certain ratio, the sizing agent is conveyed into a mine shaft tunnel in a rock body, the prepared sizing agent is used to build sealed and isolated solidified bodies with a certain thickness from inside to outside according to a certain spacing distance, compartments are formed among the sealed and isolated solidified bodies, the waste mine shaft is plugged and sealed, and accumulated water in a goaf area and the compartments is blocked and sealed. In this way, the wastewater pollution control of the waste mine shaft is realized.

The invention discloses an embedding type anchoring device for a pre-stressed anchor cable. The embedding type anchoring device comprises a strengthening structure connected with a soil blocking structure steel bar framework. The strengthening structure is provided with anchor supports. The anchor supports are provided with steel strand holes. According to the device, the anchor cable and soil blocking structures are directly connected. An anchoring method comprises the following specific steps that firstly, the soil blocking structure steel bar framework is manufactured, and the embedding type anchoring device for the pre-stressed anchor cable is fixed to the soil blocking structure steel bar framework; secondly, the soil blocking structure steel bar framework is hung in a preformed soil blocking structural hole, and concrete is poured in the soil blocking structure steel bar framework so as to form the multiple soil blocking structures; thirdly, after the concrete of the soil blocking structures is solidified, a concrete protection layer at the anchor supports is chiseled at the anchor cable elevation position to expose the steel strand holes; and fourthly, the free end of a steel strand of the anchor cable penetrates the steel strand holes, and tensioning and locking are achieved through an anchor. According to the method, construction is convenient, and the falling risk of the anchoring structure is avoided.

The invention relates to an underground integrated pipe corridor structure and a sinking type construction method. The underground integrated pipe corridor structure comprises side walls and a middlewall, the tops of the side walls and the middle wall are separately and fixedly connected with a roof, the bottoms of the side walls and the middle wall are separately and fixedly connected with a bottom plate, a back cover is arranged on the lower part of the bottom plate, a roof frame beam is arranged in the roof, and a bottom plate frame beam is arranged in the bottom plate. The underground integrated pipe corridor structure and the sinking type construction method can omit the process of excavation and support of a foundation pit, reduce the construction procedure, reduce the constructioncost, and reduce the construction period.

The invention discloses an outside-pit rescue emergency well construction method, and relates to the technical field of infrastructure construction. The technical aim of foundation pit emergency rescue can be achieved. The method comprises the steps that a protection casing is tripped in a well hole, and the protection casing is used for forming supporting on the wall of the well hole; an emergency well tube is tripped into the protection casing, the middle tube segment of the emergency well tube is a dual-layer filter tube internally containing filter materials, and the upper tube segment andthe lower tube segment are waterproof solid tubes; the filter materials are backfilled into the annular space between the emergency well tube and the protection casing, and the top face of the backfilled filter materials is higher than the middle tube segment of the emergency well tube; the protection casing is lifted to the position which is higher than the middle tube segment of the emergency well tube and lower than the top face of the backfilled filter materials; a fixing clamp is used for fixing a well opening of the emergency well tube and the protection casing; and rescue water drawingcan be implemented; after emergency rescue is finished, the emergency well tube, and the protection casing are sequentially drawn out upwards; and the backfilled clay is used for filling and levelingup the well hole. The method can achieve rapid well sinking and rapid recycling.

The invention provides a rapid construction method for a U-shaped groove crossing an existing culvert, and belongs to the technical field of culvert U-shaped groove construction. The rapid construction method comprises the following steps that a U-shaped groove foundation pit is dug; supporting piles are applied; a U-shaped groove section culvert structure top plate is broken, the pile tops of theconstructed supporting piles are removed, and pile top anchoring crown beam steel bars are reserved; full-hall supports are erected in the culvert; a pile top crown beam, a structural distribution beam and co-building structure steel bars of a U-shaped groove bottom plate and the culvert top plate are applied; and after the co-building structure of the U-shaped groove bottom plate and the culverttop plate is cast and formed at a time by adopting C35 concrete, wall bodies on both sides of the U-shaped groove are constructed through pulling a vertical formwork in opposite, and a U-shaped groove wall rear soil body is backfilled after the strength is achieved. According to the rapid construction method, on the premise of ensuring the normal using function of the existing culvert and reducing the influence of peripheral pipelines, the construction efficiency of the U-shaped groove is improved to the greatest extent, and the construction process is simplified.

The invention discloses an environment-friendly prefabricated integral comprehensive pipe gallery and an assembling method thereof. The environment-friendly prefabricated integral comprehensive pipe gallery comprises multiple pipe gallery units which are sequentially arranged in the length direction of the comprehensive pipe gallery, and each pipe gallery unit comprises a prefabricated bottom plate, a first cast-in-situ wall plate, a second cast-in-situ wall plate, a prefabricated bin separating plate and two prefabricated C-shaped outer wall plates; each prefabricated C-shaped outer wall plate comprises a main wall plate extending in the height direction of the comprehensive pipe gallery and two auxiliary wall plates which are oppositely arranged at the two ends of the main wall plate; anchoring reinforcement bars used for stretching into the first cast-in-situ wall plates are embedded into the first auxiliary wall plates; anchoring reinforcement bars used for stretching into the second cast-in-situ wall plates are embedded into the second auxiliary wall plates; and the prefabricated bin separating plates partition a pipe gallery channel into a plurality of independent pipe gallery subchannels. According to the environment-friendly prefabricated integral comprehensive pipe gallery and the assembling method thereof, all the prefabricated parts are small in section area, low inweight, simple in structure, low in comprehensive cost and excellent in structural strength and shear resistance, and site construction pollution is low.

The invention provides a slope support construction method combined with a building main body structure. The method comprises the following steps of leveling a site, excavating a construction working surface of a bottom plate of a retaining wall, building the bottom plate, a wall body and a bearing platform of the retaining wall, carrying out primary backfilling, reserving a first platform on the wall top of the retaining wall, building a foundation pipe pile of a building main body structure, performing secondary backfilling, reserving a second platform, constructing a main body foundation pipe pile, a bearing platform and an overhead structure column of the platform, performing third backfilling, reserving a third platform, constructing a main body foundation pipe pile, a bearing platform and an overhead structure column of the platform, performing final backfilling, flattening, constructing main body foundation pipe piles and finishing slope support. By flexibly adopting a combined form of vertical support and step-slope support with different heights, the building main body structure is overhead for graded step-slope, so that the aims of reducing the vertical support height, reducing the risk of an ultrahigh retaining wall, reducing the earthwork backfilling amount and saving the construction cost are fulfilled.

The invention relates to a prefabricated ground. The prefabricated ground comprises a plurality of pile foundation assemblies arranged in a foundation and distributed in an array manner, main beams each erected between two corresponding adjacent pile foundation assemblies and a bottom plate supported on the main beams. Each pile foundation assembly comprises a preformed pile and a bearing table fixedly arranged at the upper end of the preformed pile. One aim of the prefabricated ground is to provide the prefabricated ground capable of increasing the engineering construction speed and quality. The prefabricated ground has the beneficial effects that the site construction speed of the prefabricated ground is high and is one few hundredth of the time needed for a conventional foundation treatment scheme, and therefore the investment recovery period is shortened, the overall cost input is reduced, and remarkable economic benefits are achieved; and deformation of the prefabricated ground in the using period is remarkably reduced relative to that of the conventional foundation treatment scheme, and the maintenance cost of house buildings in the using period can be reduced.

The invention relates to an irrigation and water conservancy construction method. The irrigation and water conservancy construction method comprises the following specific steps that a construction position is determined, and drainage or interception treatment is conducted on the construction position; a construction road is repaired, and after surface cleaning and impurity cleaning are conducted on the construction position, construction lofting is conducted; if the original channel exists in the construction position, when the size of the original channel is larger than or equal to that of the new channel, backfilling and compacting are conducted in the original channel, and then earthwork excavation is conducted; when the size of the original channel is smaller than that of the new channel, earth excavation is conducted on the original channel; if the original channel does not exist at the construction position, earth excavation is conducted according to the size of the new channel; after excavation is completed, environment-friendly spraying films are sprayed to the two sides of the excavation face, and concrete pouring is conducted on the bottom of the excavation face; after concrete at the bottom of the excavation face is solidified, formworks are installed on the two sides of the excavation face, and concrete pouring is conducted in gaps between the excavation face and the formworks; and after the concrete is solidified, the formworks are dismantled, and then maintenance is conducted. The method is convenient to construct, and has the advantages of shortening the construction period and saving the cost.

The invention relates to the technical field of subway construction and particularly relates to a method for synchronously constructing a shield crossing piston air duct and a piston air dust upper structure. The segmented flow construction is employed by a second floor underground, the conversion of an inner support force system is reasonably completed, and a reliable reaction support system is provided for the passing of a shield. During the construction of a soil mold, a pit precipitation well is introduced out, and the stability of a piston air duct bottom plate structure in construction is ensured. After the construction of a middle plate, a middle plate hole is blocked by using a hole blocking plate, therefore, piston structure upper and lower structures are completely isolated, a closed space is provided for the shield crossing piston air duct, an effective reaction support is formed, an end reinforcement process is avoided, and the construction of the piston air dust upper structure is carried out simultaneously. According to the method, the problem that the shield crossing piston air duct and the piston air dust upper structure cannot be synchronously constructed is effectively solved, and the method has the advantages of reasonable operation, high safety and reliability, the effective avoidance of slow work, and the effective shortening of a construction period.