332results about How to "Good water stop effect" patented technology

The invention relates to a construction method for replacement of tail brushes of a shield, wherein, a tail device of a shield machine is provided with preset freezing pipes. The invention comprises the following operation steps that: replacement of the tail brushes is determined; a propulsion parameter of the shield is adjusted, and the shield posture is controlled; a special freezing ring is assembled in front of a common ring by utilization of freezing segments; the freezing pipes and temperature tubes are buried into the freezing segments in advance; a special replacement ring which is used for replacement of the tail brushes is assembled in front of the special freezing ring; the freezing pipes and freezing equipment are connected; the peripheral soil mass of a shield tail is frozen, and a freezing purdah for waterstop is formed on the rear of the tail brushes; the tail brushes are replaced one by one under the protection of the freezing purdah, and waterproof greases are infused into the tail brushes; the freezing purdah is forced to be unfrozen after replacement of the tail brushes is finished; normal propulsion of the shield is restored. The construction method for replacement of the tail brushes of the shield has the advantages of good waterstop effect, safety and reliability, simple and convenient operation and strong environmental suitability, is widely suitable for various complex special geological conditions and is particularly suitable for construction of a large-scale large-diameter bridge tunnel.

The invention provides a construction method of a long spiral high-pressure spraying cement-soil continuous wall, which comprises the following steps: 1) making a guide wall or digging a guide ditch along the center line of the pile, and determining the pile position of the spraying pile; 2) injecting the long spiral high-pressure spraying The slurry stirring pile-forming device is aligned with the pile position as the drilling center, and drilled into the hole; 3) Start the grouting pump, and use the long spiral high-pressure jet grouting to stir the pile-forming device during the lifting or lowering process of high-pressure rotary spraying until it is formed. 4) insert section steel into the spigot pile; 5) repeat the steps 2), 3) and 4) until the continuous cement-soil continuous wall is formed; 6) construct the joint beam; 7) backfill the foundation pit, Pull out the section steel after finishing. Compared with the general slope protection pile support system, firstly, the section steel can be recycled, and secondly, cement soil is used instead of concrete, so it is relatively more economical and more efficient, and can achieve the two walls of the supporting wall and the curtain wall. The water stop effect is also better than the system composed of general slope protection piles + rotary grouting piles.

The invention discloses a shield tail brush replacement annular freezing reinforcing water seal structure and a construction method thereof; the reinforcing water seal structure uses annular freezing pipe construction equipment to bury 1-2 annular freezing pipes in the soil body position needs to replace the shield tail brush, and uses an artificial freezing mode to enable the soil body around the annular freezing pipes to form a temporary annular frozen soil curtain reinforcing water seal structure; the specific technical process is listed as below: construction preparation-annular freezing pipe boring construction-freezing system and temperature measurement system installation-active freezing(temperature monitoring)-dismounting duct piece and replacing shield tail brush (freezing maintenance)-forced unfreezing-annular freezing pipe extraction (sealing hole)-back filled grouting-shield continue propulsion. The construction method is simple, easy to operate and realize, strong in construction practicality, convenient in construction quality control, good in reinforcing effect and water seal effect, outstanding in safety and reliability, and has very big application values.

The invention discloses a combined steel pile cofferdam provided with a water swellable waterproof rubber fore shaft, which comprises cofferdam pegs and cofferdam long piles used for connecting two adjacent cofferdam pegs. Each cofferdam peg comprises a U-shaped steel sheet pile and a fore shaft sub-part, and the left and right ends of each U-shaped steel sheet pile are respectively and fixedly connected with one fore shaft sub-part. Each cofferdam long pile comprises a steel pipe pile, a fore shaft parent part arranged at the outer side of the steel pipe pile, and a water swellable rubber liner arranged in the fore shaft parent part; a tubular inner cylinder matched with each fore shaft sub-part and a notch connecting the interior of each tubular inner cylinder with the exterior of each tubular inner cylinder are arranged on the fore shaft parent part; each water swellable rubber liner is fixedly arranged on the inner wall of the corresponding tubular inner cylinder; each fore shaft sub-part is sleeved into the corresponding tubular inner cylinder; and bentonite compound filler is filled in a gap between each fore shaft sub-part and each water swellable rubber liner. By taking the combination of a rigid steel pile and a flexible steel pile to have complementary advantages, the combined steel pile cofferdam has good water resistance; the fore shaft is reliable in connection; the material of the combined steel pile cofferdam is easy to obtain; and the combined steel pile cofferdam is strong in integral structural rigidity and low in cost and is quick to construct.

The invention discloses a construction method of a deep water high pile bearing platform steel hanging box cofferdam. The construction method comprises the following steps: 1) design of a steel hanging box cofferdam: Larson steel plate piles are adopted as wall plates of the steel hanging box cofferdam; 2) assembly and placement of the steel hanging box cofferdam: the steel hanging box cofferdam adopts high assembly and overall placement technologies; 3) bottom cover concrete construction: a bottom cover construction process is performed twice; after primary bottom covering, water in the steelhanging box cofferdam is extracted to a bottom cover surface; and then, the secondary bottom cover concrete casting is performed; and 4) disassembly of the steel hanging box cofferdam: after a bearing platform and part of underwater piers are constructed, the water is injected in the steel hanging box cofferdam to reach balanced inner and outer water levels; and the steel hanging box cofferdam isdisassembled. In the construction method, through the Larson steel plate piles as the wall plates of the steel hanging box cofferdam and twice bottom cover construction process, the construction progress can be accelerated, the economical cost is saved, and the engineering quality is guaranteed.

The invention discloses a water stop method for an upper-soft and lower-hard water-rich stratum foundation pit engineering retaining structure. The method includes the steps that firstly, a cast-in-situ bored pile is constructed; secondly, on the outer side of the cast-in-situ bored pile, a high-pressure jet grouting pile or a three-shaft stirring pile is constructed; thirdly, a hole is drilled in the center of the high-pressure jet grouting pile or the three-shaft stirring pile, and high-pressure jet grouting or sleeve valve pipe grouting is performed; fourthly, deep hole curtain grouting is performed; fifthly, a first-layer small guiding pit is excavated; sixthly, preliminary-stage supporting is performed on an upright excavation face of the first-layer small guiding pit; seventhly, core soil is reserved during excavation of a first-layer foundation pit; eighthly, a first-layer transverse steel purlin is arranged, and a steel cross brace is erected; and ninthly, when the pre-designed strength of the retaining structure is achieved and the monitored and measured result is accurate, next circulation is performed, and the fourth step, the fifth step, the sixth step, the seventh step and the eighth step are repeated till construction ends. The method is good in main water stop effect and good in flexibility. The technology is simple, the construction risk is small, influences on the environment are small, and adaptability to a complicated stratum is high.

The invention discloses combined type steel pipe intermediate jacking station equipment for jacking pipe construction and a construction method. The rear end surface of each front jacking pipe is connected with the front end surface of a corresponding rear jacking pipe, each intermediate jacking station round steel pipe is positioned in the corresponding front jacking pipe and the corresponding rear jacking pipe; a steel ring and annular sealing rings sleeve the outer wall of each intermediate jacking station round steel pipe; a first sealed inflatable bag sleeves the outer wall of each steel ring; a second sealed inflatable bag sleeves the outer wall of each intermediate jacking station round steel pipe and is positioned at the rear of the corresponding first sealed inflatable bag; heavy universal castors are mounted at assigned positions of the outer wall of each intermediate jacking station round steel pipe; fixed pedestals are mounted at assigned positions of the inner wall of each rear jacking pipe; after penetrating through each intermediate jacking station round steel pipe, a corresponding fixing screw is tightened and is propped against the inner wall of the corresponding rear jacking pipe; a jack is mounted on the periphery of the inner wall of the front end of each intermediate jacking station round steel pipe; and jack receiving seats are welded on the inner wall of each front jacking pipe at intervals. The construction method comprises the following steps: (1) mounting the intermediate jacking station equipment; (2) jacking; (3) detaching relevant fixing components of the intermediate jacking station round steel pipes; and (4) pulling out the intermediate jacking station round steel pipes. The combined type steel pipe intermediate jacking station equipment is reasonable in structure, convenient to construct, good in water stopping effect, convenient to assemble and disassemble and low in cost, and is used in jacking construction of long-distance jacking pipes.

The invention discloses a treatment method of plugging water stop construction for a foundation pit dewatering well to penetrate through a concrete base plate of a basement. The treatment method comprises the following steps of producing a water stop steel sleeve pipe; casting bedding concrete of a basement base plate; cutting a dewatering well strainer on a cushion surface; winding the lower end of the water stop steel sleeve pipe with bituminous hemp fibers, then inserting into the dewatering well trainer, filling seams with cement mortar and sealing; constructing a waterproof layer on the cushion surface of the basement base plate; banding reinforcing steel bars on the concrete base plate, and continuously dewatering; casting basement base plate concrete, and continuously dewatering; ending dewatering for the dewatering well one by one; and plugging the dewatering well. According to the treatment method disclosed by the invention, the double-wing-ring water stop steel sleeve pipe is adopted and is inserted into a dewatering well mouth; a plugging structure of the well mouth has the advantages of simplicity, scientificity, reasonability, safety, reliability and good water stop effect, and can well adopt to dewatering requirements of the basement base plate construction under different working conditions; and the dewatering demand of the basement reinforced concrete base plate in the construction process is met, and the problem of water stop plugging of the dewatering well penetrating through the basement reinforced concrete base plate when the dewatering is ended is well solved.

The invention discloses a steel caisson enclosure structure at an island-tunnel combination part. The enclosure structure adopts a steel box body structure; water stop gates are arranged at the two ends of the box body; and the cavity part in the middle of the box body is a dock chamber of a tunnel to be built. The bottom plate and two side walls of the box body are in a hollow structure formed by welding a steel truss and a steel plate; and multiple grids are arranged and internally filled with underwater concrete. A steel box beam is arranged at the upper part of each water stop gate. The top of the box body also serves as a bidirectional back shore of a construction platform. The bottom plate of the box body is provided with a vertical foundation cast-in-place pile reserved sleeve penetrating through the bottom plate; and the reserved sleeve extends upwards and is connected with the bidirectional back shore at the top of the box body. The enclosure structure disclosed by the invention has a good water stop effect, reduces the construction difficulty, improves the construction efficiency, shortens the construction period, creates conditions for mounting the tunnel immersed tube as early as possible, and does not cause interference to the construction at the butt joint of an overwater tunnel immersed tube.

The invention relates to a drill-hole waterstop device. The drill-hole waterstop device comprises a drilling machine, a drill pipe, a packer and a casing pipe, wherein the drill pipe is connected withthe drilling machine, one end of the drill pipe is connected with a slurry supply device, the other end of the drill pipe is used for extending into a drill well, the packer is arranged on the drillpipe in a sleeving mode and located in the drill well, the packer communicates with an air supply unit, the casing pipe is arranged on the periphery of the packer in a sleeving mode, and a certain gapis left between the casing pipe and the inner wall of the drill well. The slurry supply device is used for injecting slurry into the drill well through the drill pipe, and the packer is configured tobe that when the air supply unit supplies air to the packer, the packer expands and the size of the packer is increased, so that a channel between the drill pipe and the casing pipe is closed. The invention further relates to a waterstop method utilizing the drill-hole waterstop device. The waterstop method comprises the steps that the casing pipe is down into the drill well, then the packer is down into the casing pipe, the channel between the casing pipe and the drill pipe is blocked off, the slurry is supplied into the drill well through the drill pipe, and therefore a gap between the casing pipe and the well wall is filled with the slurry. According to the waterstop method, the waterstop time can be shortened, the slurry using amount is decreased, and the good waterstop effect is achieved.

The invention relates to a water level and water quality layering control weir of a drainage ditch of a rice field. Three types of five weir plates in different heights are designed according to the characteristics of each growth period of rice; the heights of the five weir plates are determined according to the buried depth of underground water required by the rice in different growth periods; by combining the five weir plates, outlet control weirs in different heights of the drainage ditches can be formed, and the drainage control requirements of rice reviving, early stage of tillering, late stage of tillering, booting stage, tasseling stage, milky ripeness stage, yellow ripening stage and late stage of fertilizing; two hand grabs are arranged on the lateral surface of each weir plate; an arc rubber waterstop band is arranged at the bottom of each weir plate which ensures overall seamless joint water stop among the weir plates; doorframe grooves are arranged on two sides of the drainage ditch; rubber waterstop bands are arranged on two sides in the doorframe grooves; the weir plates can be slidingly taken out or placed into the frame grooves and cannot leak water; two pull rod handles for taking and placing the weir plates are additionally arranged; and rhombus rings of the pull rod handles can be sleeved with hand grabs on the weir plates to place or take out the weir plates from the doorframe grooves on two sides of the drainage ditch. The invention has the advantages that the combined height of the weir plates cannot cause the flooding damage on the rice, can be used for retaining nitrogen, phosphor and other nutrients in the rice field and reducing the pollution of high-concentration nitrogen and phosphor in the drain to a water body. The invention saves the water consumption for irrigation, improves the utilization rate of underground water resources, has favorable waterstop effect among the weir plates and is convenient to manually operate.

The invention discloses a joint reinforcement structure for a shield tunnel end and a construction method. The joint reinforcement structure is a rectangular box structure as a whole, and the rectangular box structure is formed by reinforcement structures surrounded on four sides. The reinforcement structure near a foundation pit is a frozen soil wall, and the reinforcement structures on the remaining three sides are cement soil continuous walls. The method includes a first step of construction of cement soil continuous walls by using a TRD method to construct continuous walls of cement soil with a three-cycle method; a second step of construction of vertical frozen soil wall by firstly, drilling of freezing holes, installing a freezing station at the same time; after confirming that the freezing meets the door chiseling condition, starting to break a hole wall, forcibly unfreezing before a shield main machine enters into the hole, pulling out a vertical freezing tube after the shieldmain machine completes entering and exiting the hole, and grouting. The joint reinforcement structure has the beneficial effects that strong construction practicability, convenient construction quality control and outstanding reinforcement effect. Compared with a traditional cement-soil mixing piles reinforcing method, the method saves cost and greater promotion and application value is ensured.

The invention relates to a semi-reverse construction method for a regulation pool with huge diameter and embedded depth, which relates to the technical field of building engineering construction, in particular to a construction method technique of a regulation pool with the diameter more than 30m and the embedded depth exceeding 7m. An SMW method pile is adopted in the retaining and protecting structure of the invention, and the manufacturing procedures are a pool top cover, an upper pool wall, a pool motherboard and a lower pool wall. The method combines the excellent performances of the bottom-up method and the reverse method, can not only realize the construction safety of the regulation pool, but also save the expenses of supporting and protecting the structure because deformation displacement in complicated surrounding environment is controlled. In addition, a construction process has little water penetration and is characterized by saving labor force and construction cost.

The invention discloses a GLP03 type paddle valve comprising a floodgate frame and a flashboard; a seal valve buckle is fixed on the floodgate frame; the seal valve buckle is in a U-shaped structure which is arranged between the flashboard and an installation wall surface; the opening of the U-shaped structure is towards the flashboard; a double lip-shaped rubber sealing strip is installed in the sealing floodgate frame; and the lip-shaped part of the double lip-shaped rubber sealing strip is contacted with the flashboard, which plays a seal function. Interference close fit is formed between the lip-shaped part of the double lip-shaped rubber sealing strip and the flashboard, thus preventing fluid medium at the internal direction and the external direction of the paddle valve from passing through, and realizing bidirectional water stopping effect. Foamed rubber sealing strips are arranged between the floodgate frame and the installation wall surface and between the sealing valve frame and the installation surface, which play the function of water stop. The paddle valve of the invention has simple and lightweight design structure, high strength, convenient installation and maintenance and good bidirectional water stopping effect; compression resisting safety factor is larger than 6; and the highest adaptive water pressure can reach 10 water heads.

A crimp terminal that can maintain excellent water-stop performance over a long term and is enhanced in joint strength between a fitting portion and a covered electrical wire connection portion. The crimp terminal has a fitting portion at a tip thereof and an electrical wire connection portion at a rear end thereof, the electrical wire connection portion is configured in a tubular shape, a tip of the tube is crushed to be superimposed and closed, and a portion between the fitting portion and the electrical wire connection portion is formed by superimposing and bending two or more sheets of a plate material.