153 results about "Basement floor" patented technology

The invention relates to the technical field of constructional engineering, and discloses an anti-floating pile self-repairing system which comprises an anti-floating pile body, a repairing pipeline used for conveying a repairing agent is arranged in the anti-floating pile body, the repairing pipeline is made of a water-triggered curing polymer material, and the repairing pipeline is in contact with concrete slurry to be cured during concrete pouring. The repairing pipeline is broken under the action of pressure, the repairing agent permeates into the crack and reacts with underground water to be cured, the crack is automatically repaired, the crack rate of the anti-floating pile body is effectively reduced, overall or local failure of the anti-floating pile caused by crack expansion is avoided, safety and stability of a building are guaranteed, and the service life of the building is prolonged. The problems of basement bottom plate cracking, water seepage and the like caused by failure of the anti-floating piles are solved, related economic losses are reduced, the maintenance cost of cracks of the anti-floating piles is reduced, the problem of overall or local anti-floating failure can be avoided, the requirements of high speed and high standard of engineering construction are met, and the anti-floating pile has wide market prospects.

Insulating floor system including (i) a grooved base layer formed from base layer grooved portions, (ii) a transverse peripheral edge rail formed from transverse peripheral edge rail portions, (iii) a parallel peripheral edge rail formed from parallel peripheral edge rail portions, and (iv) interior rails formed from interior rail portions. The base layer includes grooves in an upper surface. Each of the transverse peripheral edge rail portions include a plurality of downwardly projecting mating protrusions that mate within the base layer grooves. Each of the parallel peripheral edge rail portions include a downwardly projecting protrusion that mates within a peripheral groove of the base layer. At least one of the interior rails can be a locking rail, where locking rail portions defining the locking rail include a plurality of downwardly projecting mating protrusions that mate within terminal grooves of adjacent base layer grooved portions, locking such portions together.

The application discloses a one-side formwork structure of an outer wall of a lowered floor area of a residential basement, which comprises a formwork mechanism, a support frame and a support platform, wherein the formwork mechanism comprises a shaped formwork and a non-shaped formwork arranged below the shaped formwork through a connecting piece; the support frame is arranged at one side of the formwork mechanism; the support platform is arranged on a basement floor in a slope state through a support piece; an adjusting gasket is arranged on the support piece and between the support platform and the basement floor, and the thickness of the adjusting gasket gradually increases along the downhill direction of the slope; a plurality of inclined braces are connected with the support platform at one end and connected with the support frame at the other end; and a bottom fixing piece is used for fixing the bottom of the non-shaped formwork. The formwork structure can fully meet the formwork requirement of the basement with different ground slopes, and the problem that the inclined side wall of the lowered floor area is inconvenient to construct is solved by combining the high strength and quick disassembly characteristics of the shaped formwork with the convenient processing and wide application range of the non-shaped formwork.

The invention provides an underground space communication reserved hole wall body later-stage hole communication construction method, an existing prefabricated wall body comprises a main body structure area and a reinforcing structure area, and a water stop opening method is arranged on the butt joint face of the existing prefabricated wall body, and the method comprises the steps that firstly, an automatic lock catch water stop system is installed in the reinforcing structure area of the existing prefabricated wall body, and an automatic lock catch water stop system is installed in the reinforcing structure area of the existing prefabricated wall body; a spherical rubber water stop belt is placed in the water stop opening; secondly, a to-be-built basement soil body is excavated, and to-be-built basement floors are sequentially constructed from bottom to top; 3, taking out the wall body of the hole, and arranging a vertical support at the same time; constructing a first reinforcing column on the left side of the hole; the reserved hole wall body and the existing prefabricated wall body are in butt joint and locked; sequentially taking out each wall body unit, additionally arranging a vertical support, and arranging a second reinforcing column; and fourthly, the reinforcing structure area is constructed, the existing basement floor, the existing prefabricated wall and the basement floor to be built are connected, and the lintels, the first reinforcing columns and the second reinforcing columns form a complete communicating hole.

The present application relates to a basement floor post-casting belt anti-leakage system, and relates to the technical field of basement water leakage protection technology, which includes a base plate, a post-casting belt is reserved on the base plate, and a concrete layer is poured in the post-casting belt; a water stop strip is arranged between the concrete layer and the base plate, and a groove-shaped groove is opened directly below the post-casting belt; a blind ditch is opened below the groove-shaped groove, and a drainage pipe is pre-buried in the blind ditch; graded sand and gravel are backfilled around the groove-shaped groove, and a leakage collection and guidance device is arranged in the groove-shaped groove, and the leakage collection and guidance device is used to collect the leakage in the post-casting belt and finally guide it into the drainage pipe in the blind ditch; water diversion holes are opened on the pipe walls on both sides of the drainage pipe along the length direction of the drainage pipe, and the surface of the water diversion hole is covered with geotextile. The present application has the effect of improving the leakage problem at the post-casting belt of the basement floor.

The utility model relates to a basement floor post-cast strip, which belongs to the technical field of post-cast strips and comprises a wall body, an outer side surface is arranged on the outer side of the wall body, a reinforcement cage is arranged between the wall body and the outer side surface, a protective plate is arranged at one end between the wall body and the outer side surface, and a post-cast strip plate is arranged at the other end between the wall body and the outer side surface. U-shaped mounting frames are inserted into the protection plate at equal intervals, and two ends of the interior of each U-shaped mounting frame are rotationally connected with two-way lead screws. The fixing device has the advantages that the two-way lead screw is rotated to drive the threaded rings at the two ends of the outer side of the two-way lead screw to move in the opposite directions, then the connecting rods can be driven to rotate, the clamping plates in the containing grooves are unfolded, the clamping plates abut against the outer side of the post-cast strip plate, and then the post-cast strip plate and the protection plate can be rapidly fixed; meanwhile, fastening screws do not need to be used in the mode, the situation that the fastening nuts fall off and are lost is avoided, and the connection mode is convenient and fast.

The utility model relates to a steel trestle structure on a basement top plate, which is used for crawler crane construction and comprises a steel trestle body and a slope connecting structure which are arranged above the basement top plate, the steel trestle body is formed by crossing a plurality of cross beams and two longitudinal beams, a trestle column is arranged at the bottom of the steel trestle body, and the slope connecting structure is arranged on the steel trestle body. The trestle column is arranged on the top of the basement structure column or supported on the ground. According to the steel trestle structure on the basement top plate, concrete frame columns on an existing basement bottom plate are reasonably utilized to be combined with a steel trestle system, so that the basement top plate is prevented from being damaged by construction machinery during hoisting construction of a top plate steel structural member, damage of an existing completed structure is avoided, and the construction efficiency is improved. Repair and reinforcement of structures such as a top plate and a beam after hoisting construction of the steel structure are avoided. Meanwhile, the problem that steel structure hoisting construction requirements cannot be met due to insufficient bearing capacity of the top plate is solved. And the safety of the steel structure hoisting process is ensured, so that the whole construction process of the upper steel structure is more reliable and efficient.

The invention discloses an intelligent calculation system and method for load distribution of a basement roof and a reinforcing structure, and the system comprises a basement floor plate rigidity calculation model which carries out the pre-training based on a machine learning technology, and can output the rigidity of each floor plate of a basement after inputting basement structure information and load information; and the load distribution calculation model is used for calculating the rigidity of each layer of supporting structure of the basement, simplifying a basement top plate, each layer of supporting structure of the basement and each layer of floor slab of the basement into a spring group, and carrying out load distribution calculation on an acting load value F on the basement top plate. The calculation efficiency of load distribution is much higher than that of a traditional finite element calculation method; the calculation can be completed only by collecting a few simple parameters, so that the operation is simpler; in addition, the method can be suitable for calculation of different plate spans under any load length and width, can cover more application scenes, and has the advantage of high adaptability.

The invention belongs to the technical field of basement waterproofing, and particularly relates to a basement bottom plate waterproof structure and a waterproof method.The basement bottom plate waterproof structure comprises splice plates, the splice plates can be rapidly installed through downward pressing of first displacement columns, so that the manual adjusting and positioning time can be shortened, and then the installation efficiency can be improved; meanwhile, rainwater is guided into the cavities of the adjacent splice plates through the first inclined plates, water is prevented from accumulating in gaps or further permeating into the base layer, and therefore the leakage risk is remarkably reduced; the first drainage pipe and the second drainage pipe are arranged, so that water in the cavity of the splice plate can flow into the inner cavity of the last splice plate through the first drainage pipe and is drained through the drainage pipe, the staying time of the permeated water in the cavity of the splice plate is shortened, the waterproof effect can be enhanced, rainwater at the joint can be collected and guided through the arrangement of the annular fixing plate, and the service life of the splice plate is prolonged. Therefore, the overall waterproof performance of the equipment is further improved.

The invention discloses a waterproof construction method for a junction of an underground diaphragm wall and a bottom plate, which comprises the following steps: when a side wall of a first-stage basement is constructed, a waterproof blanket is padded between the side wall and the underground diaphragm wall, and protective clamping plates are respectively arranged on two opposite sides of the upper part of the waterproof blanket; before the bottom plate and the floor slab are communicated, the underground diaphragm wall at the position corresponding to the bottom plate is dismantled to expose the protection clamping plate; a cushion layer of the bottom plate is poured and extends to the detached underground diaphragm wall; the protective clamping plates on the waterproof blanket are removed to expose the upper portion of the waterproof blanket; folding the upper part of the waterproof blanket and laying the waterproof blanket on the cushion layer; and the waterproof layer of the bottom plate is laid on the folded waterproof blanket in an extending mode. The problem that leakage hidden danger exists after through connection due to the fact that an existing through construction method for basements on the two sides of the common underground diaphragm wall is prone to damage a firstly-constructed waterproof structure is solved.

This invention provides a water-stopping device, relating to the field of building waterproofing technology. The water-stopping device includes a water-stopping steel plate and a drain pipe arranged along the length of the water-stopping steel plate. The drain pipe has a drain outlet along its length, allowing groundwater that has seeped onto the upper surface of the water-stopping steel plate to flow into the drain outlet. By installing this water-stopping device, the water-stopping steel plate can be used to seal the interface joint between pre- and post-cast concrete. If the water-stopping steel plate fails to stop the water flow, and the seeping groundwater flows from the interface joint between the water-stopping steel plate and the concrete to the upper surface of the water-stopping steel plate, the seeping groundwater will flow into the drain pipe through the drain outlet and then into a nearby sump. This prevents groundwater seeping through the concrete interface joint from leaking onto the basement floor surface, making the water-stopping device an integrated blocking and draining system with multiple lines of water-stopping defense, significantly improving the water-stopping effect at the post-cast concrete joint.

The invention provides an efficient deep foundation pit support changing and super high-rise'construction after tower exceeding 'construction method, and relates to the technical field of structural design and construction, the method comprises the following steps: S1, dividing a basement into a tower area and a non-tower area; s2, a basement inner support is built, and a foundation pit is excavated; s3, floor slabs are constructed in the non-tower area of the basement from bottom to top, a hole is formed in the tower area of each floor slab, an inner support corresponding to the floor slab of the floor slab is dismantled after the floor slab of each floor slab is completed, and the floor slab with the hole of the floor slab of the floor slab is used for support replacement; and S4, floor slabs are constructed in the tower area from bottom to top, and all basement floor slabs are closed. The method has the beneficial effects that support dismantling is carried out under the condition that the basement tower area is not closed, investment of large machines, turnover materials, manpower and the like is reduced, the basement tower area is utilized to the maximum extent for material turnover, the utilization rate of a construction site is increased, the basement construction operation difficulty is reduced, the construction environment is improved, and comprehensive benefits are remarkable.

The utility model relates to a device for draining surface accumulated water. The device comprises a box body, a self-priming pump, a corrugated hose, a metal pipe, a horn seat and a drainage piece, a water tank and a spare part box are arranged in the box body, scaffold wheels are arranged at the bottom of the box body, and a cover plate is arranged on the upper surface of the box body; a self-priming pump is fixed on the cover plate; the self-priming pump is connected to the metal pipe through a corrugated hose; a one-way valve is arranged in the metal pipe, and the lower end of the metal pipe is sleeved with an internal thread at the upper end of the horn seat through an external thread; and a drainage piece is arranged on the horn mouth of the horn seat. The device for draining the accumulated water on the ground surface can rapidly drain the accumulated water on the ground surface of a basement, adapts to different ground structures, better absorbs water, is convenient to move and maintain, and can be repeatedly used.

The present application relates to a method for preventing leakage of a post-cast strip of a basement floor, and relates to the technical field of basement water leakage protection, which includes the following steps: a post-cast strip position determination step; a floor casting step: casting the foundation floor in the basement, leaving a gap according to the location of the post-cast strip determined in advance; an underground excavation step before casting the post-cast strip: excavating a sunken groove below the gap left by the post-cast strip; a drainage ditch excavation step: excavating a drainage ditch on the ground directly below the gap of the reserved post-cast strip, laying a drainage pipe in the drainage ditch, opening a water inlet on the upper pipe wall of the drainage pipe, and connecting the drainage pipe with the sewer; a drainage and diversion step: setting a water diversion pipe between the sunken groove and the drainage pipe; a water collection construction step in the sunken groove: installing a water collection device in the sunken groove; and a post-cast strip casting step. The present application has the effect of improving the leakage problem at the post-cast strip of the basement floor.

The present application discloses a reverse construction method for a basement, which relates to the field of building construction and comprises the following steps: excavation of a foundation pit; hoisting of a rigid steel column in the first underground section; casting of the basement top plate, wherein steel support beams are pre-buried in the top plate, and a plurality of soil-taking openings are reserved on the top plate to facilitate construction of the next floor; concealed excavation of the lower layer of the base plate through the soil-taking openings; hoisting of the second rigid steel column in the underground section to the first underground section; installing a hand chain hoist on the rigid steel column in the first underground section; hoisting of the second rigid steel column in the underground section by the hand chain hoist so that the top of the second rigid steel column in the underground section is connected to the bottom of the rigid steel column in the underground section and welded and fixed; casting of the basement floor of the first underground section, with soil-taking openings reserved on the basement floor; repeating the above steps according to the number of floors to be built in the basement; forming the basement floor of the lowest basement floor when construction reaches the lowest basement floor; and sealing the soil-taking openings from bottom to top. The present application helps to shorten the overall construction period.

The present invention relates to the technical field of asphalt and discloses mixing equipment for cold patch asphalt mixture, which comprises the following construction steps: excavating a foundation pedestal to form a foundation pit, trimming the foundation pedestal and then compacting it; constructing engineering piles at the bottom of the foundation pit and waterproofing the engineering piles; installing assembled PC wall panels with an embedded waterproof layer at the bottom of the foundation pit to waterproof the basement structure; providing waterproof joints around the assembled PC wall panels, splicing and combining multiple assembled PC wall panels or dividing and shearing a single assembled PC wall panel according to the area of ​​the area to be constructed, and overlapping two adjacent assembled PC wall panels; in this way, the waterproof membrane can isolate water on the wall panels without affecting the supporting function of the wall panels, effectively preventing water leakage on the basement floor structure, and further improving the stability and waterproof performance of the wall panels.

The invention provides an internal support basement foundation pit support system and a construction method thereof, and is applied to the technical field of foundation pit support, the basement foundation pit support system comprises a soil retaining structure, and a temporary horizontal support structure and a permanent vertical support structure which support the soil retaining structure along the periphery of a foundation pit, the soil retaining structure is arranged along the inner wall of a foundation pit, the permanent vertical supporting structure comprises a plurality of sets of permanent lateral force resisting vertical components at least provided with continuous stress sections with high length-width ratios in the lateral direction, the lower ends of the components are anchored below a bottom plate of a basement, and the components are constructed through a reverse construction method. After the construction is completed, retaining in a peripheral area on the inner side of the basement; a plurality of structural columns are further constructed in the peripheral area through a sequential construction method, the structural columns and the permanent lateral force resisting vertical components are distributed in the peripheral area in a staggered mode, and the foundation pit support system has the advantages that the using amount of temporary components is small, and the main body structure is convenient to use.

The invention discloses a basement bottom plate and vertical prefabricated load-bearing component connecting joint and a construction method thereof. The construction method comprises the steps of pile and column splicing, specifically, a prefabricated column and a prefabricated engineering pile are vertically spliced at the preset position of a foundation, and a first vertical embedded rib of the prefabricated engineering pile is mechanically connected with a second vertical embedded rib of the prefabricated column; a waterproof construction step; a bottom plate cushion layer is installed on the top of the prefabricated engineering pile, a waterproof sheet layer is laid on the top of the bottom plate cushion layer, and the waterproof sheet layer is lower than the connecting face of the prefabricated engineering pile and the prefabricated column; and cast-in-place construction is conducted, specifically, transverse ribs of the basement bottom plate are connected with first transverse embedded ribs of the prefabricated columns through mechanical connecting pieces, and concrete with the top higher than the top of the prefabricated engineering pile is poured on the waterproof sheet layer to form the cast-in-place basement bottom plate. Connection joints obtained through the construction method are high in strength and good in reliability, and underground water is effectively prevented from entering the basement and corroding mechanical connection parts.

This invention relates to the field of waterproofing construction technology, providing a phased construction waterproofing method for basement slabs and a protective structure for the construction interval. The phased construction waterproofing method for basement slabs includes: constructing a steel reinforcement cage in the initial construction area, with the main reinforcement extending to a transition zone, which is located in the later construction area near the initial construction area; installing a waterproofing component at the target construction joint, with one end extending to the initial construction area and the other end extending to the transition zone; setting an isolation layer on the portions of the main reinforcement and waterproofing component located in the transition zone; pouring concrete in the initial construction area and the transition zone to cover the steel reinforcement cage and waterproofing component; before the start of later construction, removing the concrete and isolation layer in the transition zone to partially expose the main reinforcement and waterproofing component; and then proceeding with later construction. This design solves the problem in related technologies where the waterproofing effect at the construction joint location during phased construction of basement slabs cannot be guaranteed.

The invention provides a building underground structure full life cycle waterproof method based on an information fitting technology. The method comprises the following steps: firstly, collecting climate data of a region where a building is located in the first 50 years, constructing a building structure model by utilizing ENVI-met software, and simulating waterproof performance under different climate conditions; according to the simulation result, the material ratio and the construction technology of the waterproof scheme are adjusted, experimental verification is carried out, and the scheme is continuously perfected by calculating the error range and the fitting degree until the preset standard is reached. And finally, waterproof construction of a basement bottom plate and an outer wall is conducted in sequence according to the optimized scheme. The system collects climate data, simulates the influence of climate on the building, optimizes a waterproof scheme and performs experimental verification to form a complete waterproof technical system, so that the waterproof reliability and durability of the underground structure of the building are effectively improved, and the requirements of high-waterproof-performance scenes such as a hundred-year cultural relic exhibition and storage building are met.

The invention discloses a construction method and a construction structure of a fabricated post-cast strip protection plate. The construction method comprises the following steps: prefabricating an arc-shaped protection plate; in the construction process of the basement cushion layer, an annular base is synchronously poured on the basement cushion layer; in the pouring process of a basement bottom plate and an outer wall, haunch support cast-in-place structures are synchronously poured on the outer walls under the ground on the two sides of the post-cast strip on the outer sides of concrete on the two sides of the post-cast strip; the bottom of the arc-shaped protection plate is installed on the annular base, and the side wall of the arc-shaped protection plate is installed on the cast-in-place haunch support structure; and grouting is conducted at the connecting position of the arc-shaped protection plate and the annular base and the connecting position of the arc-shaped protection plate and the cast-in-place structure of the cast-in-place haunch support. Based on the measures, the construction difficulty of the post-cast strip protection plate is reduced, the connection strength and waterproof performance of the post-cast strip protection plate are improved, and the construction method has the advantages of being high in construction speed, low in construction cost, short in foundation pit exposure time and safe and reliable in foundation pit.

The utility model discloses a basement bottom plate pouring reinforcing steel bar system which comprises a cushion layer, a reinforcing steel bar net located above the cushion layer and an anti-floating anchor rod, the anti-floating anchor rod comprises an anchoring section, and the anchoring section penetrates through the cushion layer and then is anchored in a foundation soil body below the cushion layer; the lower end of the first supporting section is connected with the anchoring section, and the upper end of the first supporting section vertically extends to the lower surface of the reinforcing mesh; the second supporting section comprises a first horizontal rod located on the lower surface of the reinforcing mesh, a second horizontal rod located on the upper surface of the cushion layer and a connecting rod connecting the first horizontal rod and the second horizontal rod, and the first horizontal rod is bound and fixed to the reinforcing mesh. According to the anti-floating anchor rod, the anchoring and anti-floating capacity of the anti-floating anchor rod can be enhanced, the building safety coefficient and the building quality can be improved, the anti-floating anchor rod can replace horse stool bar construction to serve as a support of an upper-layer reinforcing mesh, and therefore the blanking procedures and the investment of reinforcing steel bars are effectively reduced, the construction cost is saved, and the economic benefits are improved.

The basement floor wall-leaning drainage ditch construction method comprises the following steps that an ink fountain line is popped along the outer side of a wall, and meanwhile a drainage ditch completion surface line is popped on the wall surface; a plurality of extruded polystyrene boards are clung to the external wall panel, and the inner sides of the extruded polystyrene boards are fixed by cement mortar; terrace concrete is poured, and then the extruded polystyrene board on the inner side of the drainage ditch is dismantled; according to the drainage ditch construction method, drainage ditch construction can be efficiently and conveniently conducted, operation is easy, cost is low, and meanwhile water leakage is not likely to be caused.

This invention relates to the field of building construction technology. To address the technical problem of anti-buoyancy in underground structures under complex hydrogeological conditions, this invention discloses a dual-control system based on drainage anti-buoyancy and dynamic balance of underground buoyancy. The system includes a drainage unit located below the basement floor slab, comprising a drainage ditch or drain pipe to collect and divert groundwater; a sump well connected to the drainage unit to collect the collected groundwater; a drainage pipeline connected at one end to the sump well and at the other end to a rainwater storage tank or municipal drainage network to discharge the groundwater from the sump well; a submersible pump installed in the sump well to discharge groundwater through the drainage pipeline; and an automatic control device electrically connected to the submersible pump to automatically start and stop the pump based on the water level signal in the sump well. The anti-buoyancy control water level of the system is set below the level that can be balanced by the structure's self-weight and additional loads, achieving dual anti-buoyancy control through a combination of structural self-weight, additional loads, and active drainage.

This invention relates to a dewatering well sealing structure and its construction method, comprising a basement cushion layer, a basement floor slab, and dewatering well pipes. The basement cushion layer is provided on the basement floor slab, and dewatering well pipes are vertically installed on the cushion layer and the basement floor slab. A fixing ring is installed on the lower inner side of the dewatering well pipe, and a lower water-stop plate is installed below the fixing ring. A primary seal is filled on the upper part of the lower water-stop plate, and an upper water-stop plate is installed on the primary seal. A secondary seal is filled on the upper part of the upper water-stop plate. This invention features improved water-stopping effect, reduced leakage risk, reduced construction costs, and increased construction efficiency.

This invention relates to the field of building construction technology, specifically to a well sealing device for a building engineering drainage well. It includes a graded sand and gravel layer and a steel casing. A cement well pipe is installed around the outer ring of the graded sand and gravel layer. A quick-setting concrete layer is laid on top of the graded sand and gravel layer. A cushion layer is installed at the bottom of the outer ring of the cement well pipe. A basement floor slab is laid on top of the cushion layer. A micro-expansion concrete sealing layer is laid on top of the quick-setting concrete layer. A water-stop steel plate is fixedly connected to the top of the inner ring of the steel casing, and a water-stop ring is fixedly connected to the outer ring of the steel casing. A support component is installed on top of the micro-expansion concrete sealing layer, and a waterproof component is installed at the bottom of the water-stop ring. Through full welding connection of the steel casing, water-stop ring, and water-stop steel plate, combined with a micro-expansion concrete sealing layer of equal strength to the base slab, a robust and rigid pressure-resistant framework is constructed. This effectively solves the problem of easy cracking and leakage in traditional sealing methods under high-pressure underwater conditions.

The invention relates to the technical field of building construction, in particular to a support changing structure and method of a prefabricated support changing plate. The support changing structure comprises a basement building body, a supporting wall and an inner supporting beam, a cast-in-place continuous support changing plate strip is arranged between a basement bottom plate and the supporting wall, the opposite faces of a basement outer wall and the supporting wall are provided with corresponding supports for bearing prefabricated support changing plates, and a top support adjusting part is arranged on a main plate body; the support changing method comprises the steps of pouring the bottom plate, the plate strip, the outer wall and the top plate, installing the prefabricated support changing plate, dismantling the supporting beam, backfilling the fertilizer groove and dismantling the prefabricated support changing plate. The inner supporting beam can be dismantled in advance, the construction period is shortened, the prefabricated supporting plate can be recycled, and the construction economic benefit and the resource utilization efficiency are improved.

This invention relates to a method for dewatering existing basement slabs in high-water-head areas. The method involves pre-drilling holes in the existing slab and installing opening and closing devices to ensure the slab's watertightness and strengthen the connection between the dewatering equipment and the slab, preventing water pressure from breaching weak points in the holes. Simultaneously, two drilling operations are employed during the drilling process to prevent groundwater from escalating and causing hazards after the dewatering channels are opened in high-water-head areas. By installing pressure monitoring pipes, the groundwater level can be monitored in real time during dewatering, allowing for continuous monitoring of the groundwater head and preventing unforeseen events. This method provides strong water-stopping effects after drilling holes in the existing basement slabs in high-water-head areas and facilitates subsequent sealing. This method effectively reduces the groundwater head beneath existing basement slabs in high-water-head areas, thus preparing for the connection between new and old buildings and possessing high engineering practical value.

The present application relates to a kind of water collecting well strong gushing water's guide and discharge steady flow pressure seal and re-plugging processing method in underground engineering waterproofing technical field, to solve the technical problems of difficult grouting, pressure seal easy failure and low pumping efficiency under the condition of strong gushing water.The technical scheme is as follows: after pumping positioning, arrange the flow pressure seal steel plate with drain hole above the gushing point to realize steady flow guide and discharge, then set the frame structure with sandbag or block weight on the steel plate to resist scouring, finally implement wellhead closure, pressure grouting and micro-expansion concrete re-plugging.The present application is mainly used for strong gushing water treatment of water collecting well such as basement floor and foundation pit bottom.

The utility model discloses a staged project basement outer partition wall construction structure which comprises a basement bottom plate, a first-stage outer wall, a second-stage outer wall mechanism, a first-stage top plate and a second-stage top plate, the second-stage outer wall mechanism is provided with a plurality of vertical keels arranged on the basement bottom plate, and the tops of the vertical keels are connected with the second-stage top plate. A plurality of supporting keels are evenly distributed on the side, facing the first-stage outer wall, of the vertical keel, the supporting keels are connected with the first-stage outer wall, and a plurality of horizontally-arranged transverse keels are evenly distributed on the other face of the vertical keel from top to bottom and are parallel to the first-stage outer wall. A cement board with the top and the bottom connected with the second-stage top board and the basement bottom board is fixed to the sides, away from the vertical keels, of the transverse keels, and the cement board, the transverse keels and the vertical keels jointly form a second-stage outer wall mechanism. The construction cost of the basement outer wall constructed by stages is greatly reduced, the leakage risk caused by differential settlement is reduced through the treatment of top plate connection, and the structure can be widely applied to underground construction.