34results about How to "Meet anti-seepage requirements" patented technology

The invention relates to a construction method for protecting a vertical main pipe of a hot spring well in a foundation pit, comprising the following steps: 1) arranging a circle of cement mixing piles along the periphery of the vertical pipe of the hot spring well, and metal pipes are respectively inserted in the centers of the cement mixing piles; 2) Excavate the earthwork, and then manually excavate the cement soil of the cement mixing pile; 3) Build a support platform between the metal pipe and the top of the casing; 4) Removably install the wellhead force plate on the support 5) Repair and install the lifting frame on the support platform; 6) Continue to excavate the earthwork by layered excavation, and remove the cement soil layer of the cement mixing pile until the earthwork falls to the bottom of the basement floor elevation. The invention can protect the safety of the structure of the hot spring well vertical pipe itself during the construction process, and the construction progress is fast, and can effectively ensure the normal production and operation of the hot spring well vertical pipe during the construction process.

The invention provides a nanofiber waterproof membrane for a river levee. The nanofiber waterproof membrane comprises a plurality of rectangular main membranes in parallel arrangement, and further comprises seam filling membranes which are arranged between the main membranes and can play sealing and connecting roles, wherein each main membrane comprises a first base layer, a first nanofiber layer and a second base layer which are arranged from bottom to top; each seam filling membrane comprises a third base layer and a second nanofiber layer which are arranged from bottom to top; the two sides of the first base layers and the second base layers extend outwards to form first connecting layer sections and second connecting layer sections; the first connecting layer sections are connected with the third base layers of which the widths are equal to those of the first connecting layer sections; the first connecting layer sections and the second connecting layer sections of the adjacent main membranes are mutually connected; and the second nanofiber layers are slightly wider than the third base layers. The nanofiber waterproof membrane is combined with the nanofiber technology, and is low in preparation cost, excellent in impermeability, long in service life and strong in adaptability to the aquatic and geological environment.

The invention discloses an environment-friendly and low-cost fluoroaluminate cement preparation process by adding waste bricks. Fly ash, slag, silica fume, gypsum, and carbon nanofibers are mixed, ground to a particle size of 50-150 μm, polycarboxylate superplasticizer, sodium gluconate, penetrant, and water are added to mix uniformly to obtain environmentally friendly low-cost fluoroaluminate cement. Compared with the prior art, by adopting the above technical solutions, after the waste bricks are modified, not only the porosity of the waste bricks can be reduced, but also the waterproof and impermeability properties can be effectively enhanced, and the mechanical properties of the cement can also be enhanced. Environmental protection, the preparation method of the mortar is simple, convenient to operate, and can be widely popularized and applied.

The invention relates to a method for constructing the earth-rock dam vibrated bitumen concrete seepage cutoff wall, belonging to the construction of earth-rock dam seepage cutoff wall. It comprises following steps: a, laying mold plate; b, laying high temperature resistant flexible cloth-base material to cling the inner side of mold plate and its width is bigger than the thickness of bitumen concrete; c, laying transition material at the outer side of mold plate and rolling the transition material; d, laying bitumen concrete; e, moving the mold plate or removing the mold plate. The invention has the advantages that: the compound seepage cutoff element formed by the bitumen concrete wall and the high temperature resistant cloth-base material has better flatness of the contact surface with the transition material to confirm the effective seepage cutoff section of bitumen concrete wall.

The invention discloses an integral casting process for a reinforced concrete wastewater tank in predrilling engineering. The integral casting process comprises the following steps of a, construction of a foundation and a bedding layer, digging a foundation pit, and casting the concrete bedding layer after determining that the foundation bearing force meets the design requirements; b, manufacturing and installation of reinforced bars, manufacturing and installing on site, wherein the overlapping length of the reinforced bars should not be less than 40 times of the diameter (mm) of each reinforced bar, and the overlapping area of the reinforced bars same in cross section should not be more than 50% of the total area; c, supporting of die plates, binding the die plates into the shapes of the bottom and the wall of a concrete tank; d, casting of concrete, after completing the construction of the reinforced bars and the die plates, carrying out the casting construction of concrete, firstly casting the bottom of the concrete tank and the wall with the height less than 1m, leveling the top of the wall of the concrete tank, and reserving no step to complete the first time of casing; casting the residual wall of the concrete tank in at least one hour after completing the first time of casting; and e, removal of the die plates, removing the die plates when the strength of the cast concrete being more than 1.2MPa. The integral casting process has the advantages that the construction time of the wastewater tank in the predrilling engineering is reduced, the construction period of the whole predrilling engineering is shortened, the condition of drilling machines not waiting for well fields is ensured, the construction seams are not reserved in the construction, and the leakage problem caused by the construction seams is avoided.

The invention discloses a combined anti-seepage structure for a culvert and a construction method thereof. The combined anti-seepage structure for the culvert and the construction method thereof are used for resisting seepage of the culvert and protecting a self anti-seepage system. The anti-seepage system comprises an original anti-seepage structure, a concrete or clay bedding, an anti-seepage structure protection system and a composite geomembrane structure; the adopted main technical scheme is that, a composite geomembrane is paved between a culvert foundation and an upstream anti-seepage bedding, the geomembrane is in seal connection with the bedding and a bottom plate in the horizontal direction, and paved in a stair shape in the perpendicular direction, so that a remaining width for jointly deformation of a membrane and a soil mass is reserved on the geomembrane, and an anti-seepage defense is formed at the joint of the bedding and a gate foundation. The composite geomembrane still can be normally used for preventing seepage when the bedding cracks due to unevenness and settlement.