Outside-enhanced retaining supporting structure

Abstract

The invention discloses an outside-enhanced retaining supporting structure which belongs to retaining supporting structures, and aims to provide a retaining supporting structural system, which is reasonable in structure, convenient in construction, short in construction period, low in construction cost and effective in leak proofing. The outside-enhanced retaining supporting structure is technically characterized in that a continuous retaining wall is formed by support wallboards by enclosing, longitudinal rib plates are distributed on the outer side of each support wallboard, connecting plates or connecting beams are further disposed on the periphery of each support wallboard, and the support wallboards, the longitudinal rib plates and the connecting plates or connecting beams form a rigid whole. The outside-enhanced retaining supporting structure is used for foundation pit or slope supporting.

Description

technical field [0001] The invention relates to a soil retaining and supporting structure, and more specifically, relates to an externally reinforced soil retaining and supporting structure. Background technique [0002] The current foundation pit support system: the flexible support system is mainly in the form of anchor rod + shotcrete mesh reinforcement surface layer; the rigid support form is pile or ground connection wall + support or anchor cable. The flexible support system is low in cost, but its displacement control ability is poor and the excavation depth is limited. The rigid support system is expensive, but it has a strong ability to control surrounding deformation and a large excavation depth. When the excavation depth of the foundation pit is relatively large, the mechanical properties of the surrounding soil layer are poor, and the surrounding environment is severe, the pile (or ground connection wall) + internal support (or anchor cable) support system is us...

AI Technical Summary

Problems solved by technology

[0003] The pile (or ground connection wall) + internal support support system has the following disadvantages: 1. The concrete support needs to be molded, installed steel bars, poured concrete, etc., which requires a long construction period; when the main structure of the basement is constructed later, the support needs to be removed. It takes a lot of manpower and material resources, and it will generate dust and pollute the environment

2. If steel support is used, large-scale equipment is required for hoisting

In addition, the steel support is assembled on site, the integrity is not strong, and the system is unstable. It is very easy to cause foundation pit collapse and damage accidents, damage surrounding buildings and structures, bring huge property losses, and cause serious social impact.

3. After the excavation depth of the foundation pit increases, the main construction period of the foundation pit construction is determined by the construction and removal of the support in many cases, and the construction period of the foundation pit using the internal support system will be extended a lot

4. Since the inner support occupies the internal space of the excavation of the foundation pit, which hinders the operation of the construction machinery, it causes a lot of inconvenience in the excavation of the earthwork in the foundation pit and the construction of the main structure of the basement in the later stage

During the construction process, the anchor cable needs drilling, anchoring, anchoring, grouting, waiting for the setting period, etc., and the construction period is long

2. During the construction of the anchor cable, it is necessary to lay a large length, and the surrounding environment has a large impact range, especially in the current urban foundation pit, where there are a large number of municipal pipelines, building foundations, subway tunnels, etc. within a certain range

In the case of complex surrounding environment, laying anchor cables may damage buildings and structures, so the use of anchor cables is also greatly restricted.

3. If it is an anchor cable in the soil layer, due to the creep of the soil, the displacement of the anchor cable support system will continue to increase, resulting in a dangerous situation in the support system

4. Opening holes in the sand layer and setting anchor cables will also bring out a large amount of sand and water, causing ground subsidence, etc., seriously affecting the safety of the foundation pit support system and the surrounding environment

[0005] The current slope pile-anchor support system, due to the creep effect of the anchor cable in the soil layer, will bring danger to the permanent use of the slope and limit its use

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