46results about How to "Improve soil retaining effect" patented technology

The invention relates to a temporary support structure for foundation pit construction and a temporary support construction method, including piles, inclined piles, inclined support mechanisms, limit mechanisms, and soil retaining boards. The piles are uniformly distributed from front to back , a square chute is arranged on the front and rear sides of the pile, a square hole is arranged on the inner wall of the upper end of the square chute, and an obliquely supported pile is distributed on the right side of each pile, between the pile and the obliquely supported pile An oblique support mechanism is connected, a limit mechanism is connected between the inner surfaces of two adjacent piles, and a soil retaining plate is distributed on the left side of each limit mechanism. The present invention can solve the problems existing in the construction of the existing temporary retaining wall: most of the existing piles use wooden piles, and the wooden piles cannot be recycled, and the angle of the piles cannot be limited when the piles are inserted. As a result, the soil retaining board cannot be fitted on the inner side of the pile, resulting in problems such as poor support effect of the support structure.

The invention discloses a FRP plate strip type foundation pit support structure and a construction method. The structure is mounted around a foundation pit for realizing the support of the foundation pit; the positioning paying-off is performed along the foundation pit support; pipe piles manufactured by FRP rib materials are inserted in leading holes; three pipe piles are formed to one set to form support pile bodies; hoop locks for holding the pipe piles and supporting the three pipe piles are respectively arranged at the tops of the pipe piles and in the positions of the pile piles at the dig depth bottom of the foundation pit; and FRP strip cloth is wound and connected among the pipe piles at the front sides of the support pile bodies. The FRP pipe piles are adopted, and the hoop locks are arranged to form transverse support and restraint for the support pile bodies, so that the support structure is more stable; the DRP strip cloth achieves a better soil stop effect, so that the type of the foundation pit support can be enriched, the selection range of the foundation pit support is widened, the construction period is shortened, and the energy conservation and the consumption reduction are realized; and the form of the foundation pit support can be expanded from a conventional plane mode to a space mode, so that the rigidity of the support structure is effectively improved, and the safety and the stability of foundation pit engineering are realized.

The invention provides a prestressed high-strength concrete hollow support pile. The prestressed high-strength concrete hollow support pile comprises a reinforcement cage framework and a concrete pile body, the cross section of the concrete pile body is in a polygonal hollow tube shape, and the concrete pile body comprises a pile body upper flange plate, a pile body lower flange plate, a pile body left side supporting leg, a pile body right side supporting leg, a pile body tenon and a pile body mortise groove. The pile body upper flange plate and the pile body lower flange plate are symmetrically arranged and are both formed by welding more than two longitudinal prestressed main reinforcements and more than two hoop reinforcements in a crossed manner; the hoop reinforcements are uniformly distributed between the pile body upper flange plate and the pile body lower flange plate in a surrounding manner; the pile body tenon and the pile body mortise groove are located on one side of the pile body left supporting leg and one side of the pile body right supporting leg correspondingly, and the pile body tenon and the pile body mortise groove are meshed and matched. Grouting reserved hole grooves are symmetrically formed between the pile body tenon and the pile body mortise groove. According to the prestressed high-strength concrete hollow support pile, the structure is stable, the soil fixing and water stopping effects are good, construction is easy and convenient, the construction cost is low, mechanical and automatic production machining procedures are adopted, the construction period is short, and the efficiency is high.

The invention relates to the technical field of construction, in particular to an unlocking repair method for dense sand layer steel sheet piles. On the side where the first steel sheet pile and the I-shaped steel sheet pile are out of lock, a retaining structure will be constructed on the side away from the harbor basin to isolate the sand layer behind the out of lock, and the underwater construction will repair the out of lock. The construction of the steel sheet pile unlocking restoration method of the present invention is extremely simple, blocks the flow of sediment to the harbor basin, completely solves the difficulty of unlocking restoration and the sequelae of wharf structural safety, and has great popularization value.

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 a foundation pit support construction method of a pile bottom solidified diagonal bracing pile by adopting a static pressure implantation method. The supporting pile construction is firstly performed to form an enclosure row pile, and then the foundation pit is initially excavated to construct the diagonal bracing. Then use the guide device and hydraulic oil top to press the diagonal braced pile into the soil layer by sections, and make the bottom of the diagonal braced pile lower than the marked depth of the foundation pit, so that the foundation pit can be excavated to the design marked depth in the process of secondary excavation. , the side wall of the foundation pit is not easy to overturn, and at the same time, after the construction of the diagonal brace piles, the secondary excavation of the foundation pit can be carried out, which significantly shortens the construction period of the foundation pit project.

The invention discloses a construction method of a soil retaining board structure between adjacent anti-sliding piles. Firstly, the connecting ribs, reinforcing ribs and U-shaped ribs are anchored together with the wall protection concrete; The pile reinforcement cages are tied together; the soil between the piles is excavated in sections and excavated into an arc structure, the back side curved longitudinal reinforcement and the connecting reinforcement are bound together, and the front longitudinal reinforcement of the pile is reinforced with the L-shaped The tendons and connecting bars are bound together, and the back side bending longitudinal bars and the front longitudinal bars of the pile are bound together by connecting stirrups; the formwork is fixed and cement mortar is poured; the formwork is removed after the cement mortar is solidified; Construction work of retaining plate structure between piles for anti-slide piles. The invention makes full use of the retaining wall, avoids waste of the retaining wall, improves the soil retaining ability of the earth retaining board, further reduces the thickness of the earth retaining board, and saves construction costs; The traditional bending member is changed into a bending member, which improves the safety.