Construction method of municipal soft soil subgrade

A construction method and technology of soft soil subgrade, applied in roads, roads, buildings, etc., can solve problems such as insufficient shear strength of soft soil subgrade, damage of road structure layer, collapse of road embankment, etc., so as to prevent settlement and subsidence and improve compactness Degree, improve the effect of carrying capacity

Inactive Publication Date: 2019-04-26
滨州京鲁交通工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the adverse effect of soft soil subgrade on urban roads is mainly due to the insufficient shear strength of soft soil subgrade, which is difficult to bear the load transmitted by the road surface. Under the load, the soft soil subgrade will produce local or overall shear failure, resulting in road surface Embankment collapse and instability, resulting in damage to the road structure layer

Method used

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  • Construction method of municipal soft soil subgrade

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Experimental program
Comparison scheme
Effect test

Embodiment

[0037] Embodiment: a kind of construction method of municipal soft soil subgrade, such as figure 1 As shown, the roadbed 100 includes a cement reinforcement layer 101, a cushion layer 102, a reinforcement layer 103, and a top seal layer 105 arranged in sequence from bottom to top, and also includes a retaining wall 104, which is located on the cement Both sides of the reinforcement layer 101, the cushion layer 102 and the reinforcement layer 103; the cushion layer 102 is provided with a layer of uniformly arranged longitudinal ribs 1021 and a layer of evenly arranged transverse ribs 1022;

[0038] Described construction method is carried out according to the following steps:

[0039] Step 1: Cleaning and removal of subgrade topsoil;

[0040] Step 2: Set drainage ditches on both sides along the roadbed direction at the bottom of the roadbed; set longitudinal and horizontal blind ditches at the base of the roadbed;

[0041] Step 3: Burying settlement and displacement observati...

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Abstract

The invention discloses a construction method for a municipal soft soil roadbed. The roadbed comprises a cement stabilization layer, a cushion layer, a reinforcing layer, a top sealing layer and a retaining wall; the structure is reasonable, the bearing capacity of the roadbed can be enhanced by the adoption of the retaining wall, in the cement stabilization layer, a curing agent promotes cement and soil to be subjected to a hydrolysis hydration reaction, gel is formed, finally a stable whole structure is formed, so that the overall strength of a soil body is improved, and the use bearing capacity of the roadbed is further improved. The cushion layer is laid for three times to be constructed and leveled and compacted layer by layer, the compactness is improved, and therefore the stability of the roadbed is improved. Longitudinal reinforcing ribs are arranged between the laid layer at the first time and the laid layer at the second time, transverse reinforcing ribs are arranged between the laid layer at the second time and the laid layer at the third time, the supporting force of the roadbed is enhanced, and the bearing capacity of the roadbed is further improved. Therefore, the construction method has the beneficial effects of being high in feasibility and efficiency, and the roadbed has the beneficial effects of being high in bearing capacity, unlikely to settle and collapse and the like.

Description

technical field [0001] The invention relates to the technical field of construction of a municipal soft soil roadbed, in particular to a construction method of a municipal soft soil roadbed suitable for soft soil layers. Background technique [0002] The composition of soft soil is complex, containing a large amount of chemical origin substances such as carbonate and evaporated salt, and biogenic substances such as humic mud debris. Soft soil is generally deposited in a flowing water environment, with silt particles and obvious bedding, and the regional differences are large. Soft soil subgrade mainly has the following characteristics: soft soil subgrade has the characteristics of high water content and relatively large pores; soft soil has obvious structure; has obvious rheology; high compressibility, poor water permeability; shear strength very low. [0003] In the construction of roads in soft soil areas, problems such as road settlement and deformation often occur, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C3/00E01C3/04
CPCE01C3/00E01C3/04
Inventor 刘西平
Owner 滨州京鲁交通工程有限公司
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