1189 results about "Water stop" patented technology

The invention provides a test method and device for testing the sealing property of a pipe-jacking construction device. The two ends of a receiving bin are provided with sealing rings and connected with a pressure stabilizing bin to form a pipe-jacking receiving device. A casing pipe is installed at the rear end of the pipe-jacking receiving device. A starting opening water stopping sealing device is installed at the rear end of the casing pipe, and pipe joint sets are jacked forward in sequence to enable the front ends to enter the receiving bin and the rear ends to be located outside the casing pipe, so that a sealing cavity is formed between the casing pipe and the pipe joint sets, and a sealing cavity is formed between the pipe-jacking receiving device and the pipe joint sets; the two sealing cavities are filled with mud to simulate a mud sleeve; the pipe joint sets are jacked and pressed, then the two sealing cavities are inflated and pressurized till air pressure is equal to stratum water pressure verified through testing, and whether mud overflows from the outside of the starting opening water stopping sealing device, joint positions in the pipe joint sets and the outside of the pipe-jacking receiving device is observed. According to the method, before construction is carried out, the sealing property of a pipe-jacking construction device can be tested in advance, and the test device is low in cost, convenient to operate and capable of testing the sealing property of the pipe-jacking construction device under the high water pressure condition.

The invention relates to a building engineering construction method, in particular to a high-rise building basement roof settlement post-pouring joint advanced water stop construction method. The construction method includes the steps that the two sides of a post-pouring joint are chiseled and cleaned; a formwork and a supporting system are erected on the lower portion of the post-pouring joint; waterproof coiled materials are laid at positions, on the two sides of the post-pouring joint, of a basement roof; walls are built on the waterproof coiled materials respectively; the upper portions of the walls are covered with reinforced concrete cover plates; an underground body structure waterproof layer is constructed; backfill construction is carried out; post-pouring joint concrete is poured. The construction method has the advantages that a basement roof waterproof layer, a protective layer and outdoor backfill can be integrally constructed and are prevented from being interfered by basement roof post-pouring joint construction, and the construction quality of an underground waterproof structure is guaranteed. Impurities, rainwater and water for construction are effectively prevented from flowing into a basement through the post-pouring joint.

The invention discloses a synchronous tunnel grouting and drainage construction method for controlling ground heaving. The method comprises the following steps that rotary spraying piles are arrangedfrom the ground surface to the two sides of a tunnel to form water stop curtains; after tunnel support is finished, drilling and grouting are carried out above the tunnel face to form an advanced reverse curved arch connecting the water stop curtains on the two sides; after the advanced reverse curved arch is formed, a drainage channel is drilled at the bottom of the advanced reverse curved arch along the tunneling direction, and accumulated water is drained through the drainage channel; and full-section grouting operation is carried out on the tunnel while opening of the drainage channel is guaranteed. The advanced reverse curved arch is in the shape of an arc which is opened towards the ground, water accumulation is easy, and the drainage effect is good after a hole is drilled at the bottom; the originally closed grouting system can be opened by reserving the drainage channel at the bottom of the reverse curved arch, so that drainage work can be synchronously carried out during tunnel advanced pouring construction, excess accumulated water in the stratum is further squeezed and drained by utilizing the lifting effect of grouting, excess pore water pressure caused by grouting construction can be remarkably reduced, and the purpose of preventing excessive ground heaving is achieved.