8 results about "Lateral earth pressure" patented technology

This invention belongs to the field of data analysis technology and provides a data-based intelligent monitoring method and system for the safety of pit construction. The method includes acquiring horizontal displacement data, support pile stress data, lateral earth pressure data, pore water pressure data, and pit perimeter vibration acceleration data of the supported pit; determining a displacement risk coefficient based on the horizontal displacement data; determining a stress overload coefficient based on the support pile stress data; determining an earth pressure fluctuation coefficient based on the lateral earth pressure data; determining a water pressure change coefficient based on the pore water pressure data; determining a vibration damage coefficient based on the pit perimeter vibration acceleration data; and determining a comprehensive impact index. By collecting data directly related to the ongoing pit construction, the method can accurately capture the disturbance effects of vibration, stress transmission caused by soil excavation, and groundwater level changes caused by precipitation on the completed pit.

This invention discloses a pseudo-static calculation method, system, storage medium, and electronic device for active earth pressure in finite-width fill under seismic conditions using the RB displacement mode. The method first determines the failure mode based on the fill geometry, identifying a potential slip surface composed of a combination of logarithmic spirals and straight lines. The core innovation lies in establishing a small principal stress trace arch model to quantitatively analyze the deflection of principal stresses in the soil caused by friction at the wall-soil and rock-soil interfaces, and deriving the lateral earth pressure correction coefficient. K w Based on this, the damaged soil is divided into zones, and differential equations considering the equilibrium of seismic inertial force, self-weight, and interface forces are established, combined with the aforementioned correction coefficients. K w By performing the solution, a more realistic distribution of earth pressure intensity, magnitude of resultant force, and location of application point are obtained. This invention overcomes the limitations of traditional semi-infinite soil theory and provides an accurate and reliable theoretical tool for the seismic design and stability analysis of retaining structures in narrow spaces.

This invention relates to the field of drainage ditches and discloses an installation method for a support-free prefabricated side ditch, comprising the following steps: Step 1, inserting two self-advancing templates into the soil; Step 2, excavating between the two self-advancing templates; Step 3, pouring the side panels; Step 4, removing the self-advancing templates, which can be reused. This method eliminates the need for foundation pit support and on-site pouring of the base slab, requiring only the pouring of the side panels. While ensuring resistance to lateral earth pressure, it achieves smooth drainage, reliable quality, reduced investment, less land occupation, and meets the requirements of industrialized construction.

This utility model relates to the technical field of anti-collapse support structures, and discloses an anti-collapse support structure for the sides of large deep foundation pits, including side baffles and corner baffles, both with protrusions at both ends and in the middle. Adjacent side baffles are slidably fitted onto a sliding groove via a locking strip, and adjacent corner baffles are slidably fitted onto a sliding groove via a locking strip. The outer side of the side baffles is bolted to a locking frame and a side crossbeam, and the outer side of the corner baffles is bolted to a locking frame and a corner crossbeam. The locking frame and the crossbeam are connected via bolt holes. The side baffles and corner baffles have anchor holes, with rotatable retaining rings threaded into the holes. The retaining rings are connected to anchor seats via bearings, and have handles and ball bearings on their outer sides. This utility model improves construction efficiency and economy through modular sliding connections and a detachable support system, shortens the construction cycle through rapid assembly, reduces costs through reusable components, resists lateral earth pressure through the overall structure, and enhances the reinforcement effect by combining anchor bolts with synergistic support, thus avoiding the risk of collapse.

The present application relates to a kind of new type of wall protection mud material for ultra-deep underground continuous wall and its preparation method, comprising the following steps: pour mixing water into the first container, while adding bentonite, the first container is stirred to be uniformly dispersed;Sodium carbonate, sodium carboxymethyl cellulose, xanthan gum and silicone acrylic emulsion are mixed and added to mixing water and poured into the second container, and stirred to be fully hydrated;Mix the solution in the first container and the second container, stir to be fully mixed, complete mud preparation.The beneficial effects of the present application are: it can avoid the hidden troubles such as excessive lateral earth pressure, large amount of mud loss, thin and dense mud skin cannot be formed when the excavation depth of underground continuous wall is large, configure a new type of modified bentonite wall protection mud with suitable physical stability and chemical stability, appropriate relative density, good mud skin forming property, which can adapt to the working condition of ultra-deep underground continuous wall, avoid the occurrence of hole collapse and shrinkage phenomenon, so as to ensure the quality of slotting and construction safety.

The present application relates to the field of drainage ditch, disclose a kind of combined roadbed side ditch construction method, comprising the following steps: step one, two groups of prefabricated side plate are inserted into soil body;Step two, excavate soil body between two groups of prefabricated side plate;Step three, set bottom plate between two groups of prefabricated side plate;Step four, lay cover plate on the upper end of two groups of prefabricated side plate.Not do foundation pit support, without pouring side plate on site, while ensuring resistance to lateral earth pressure, to achieve smooth drainage, reliable quality, reduce investment, reduce land occupation and meet the requirements of industrialized construction.

The application discloses a kind of state-related sand static earth pressure coefficient calculation method considering particle size and compactness.The method comprises the following steps: obtaining the state parameter of the sand sample to be measured, the state parameter includes the compactness parameter reflecting the compactness of the sand sample to be measured, and the particle size parameter reflecting the particle size;Based on the compactness parameter, the peak friction angle of the sand sample to be measured is determined by a preset friction angle growth equation;Based on the peak friction angle and the particle size parameter, the static earth pressure coefficient of the sand sample to be measured is calculated by a preset static earth pressure representation model.The application overcomes the technical limitations of traditional single-variable empirical formula, effectively couples the particle size effect and state correlation in soil mechanics response, and significantly improves the calculation accuracy of static lateral earth pressure under complex sand foundation conditions.

The application provides a prediction method and a measuring device for the relationship between lateral earth pressure and displacement of swelling soil. When measuring the lateral earth pressure of swelling soil under the condition of no displacement, a fixed block is arranged in the test device, a gradient initial constant vertical pressure is applied to the swelling soil sample for different tests, the swelling soil sample suction is gradually reduced to 0 after the sample is stable; when measuring the lateral earth pressure of swelling soil under the condition of lateral displacement, a plurality of horizontal elastic members and a plurality of horizontal displacement meters are arranged in the test device, a gradient initial constant vertical pressure is applied to the swelling soil sample for different tests, the swelling soil sample suction is gradually reduced to 0 after the sample is stable, the type of the plurality of horizontal elastic members is changed, and the test is repeated. Through fitting the test result data, the parameter value of the specific formula is determined, and then the change relationship between the lateral earth pressure of swelling soil and the lateral displacement in the humidification process is predicted.