River-adjacent existing roadbed embankment wall section widening structure and construction method
A technology of subgrade and embankment, which is applied in the direction of infrastructure engineering, roads, embankments, etc., can solve the problems of high construction cost, large investment in equipment, and long construction period, and achieve the effect of reducing construction investment, reducing potential safety hazards, and ensuring the quality of connection
Pending Publication Date: 2022-07-22
ROAD & BRIDGE INT +1
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Problems solved by technology
This method has complicated process, long construction period, high investment in equipment, and the construction quality is difficult to guarantee. During the later operation process, quality problems such as uneven settlement often occur at the junction of the old and new subgrades;
[0004] 2. According to the width of the widened roadbed, when the new shoulder wall is located on the slope of the existing embankment, in order to ensure the bearing capacity of the foundation of the shoulder wall, it is necessary to increase the foundation of the shoulder wall or carry out foundation reinforcement, and the damage to the slope of the existing embankment is relatively small. Large impact on the stability of the existing embankment, there are certain safety hazards, and the construction cost is relatively high; when the new shoulder wall coincides with the existing embankment wall, the existing embankment wall needs to be demolished, seriously affecting the stability of the existing embankment, especially in the rainy season When the river flow is fast, the demolition of the existing embankment wall may cause subgrade collapse accidents; when the new shoulder wall is located in the channel outside the existing embankment wall, the foundation of the new shoulder wall is difficult to deal with when the channel is weak and the covering layer is thick. higher cost
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[0041] like figure 1 , figure 2 , image 3 , Figure 4 , Figure 8 As shown, the existing subgrade 1 is built near the river, and there is an embankment wall 2 in the river channel, and this section of subgrade needs to be widened. The widening structure includes a concrete base 3 poured along the edge of the widened roadbed, and a baffle plate 4 is fixed and erected on the concrete base along the longitudinal direction of the roadbed. The height of the baffle plate is flush with the design elevation of the roadbed. A vertical rod 5 is set at a certain distance, and the lower end of the vertical rod 5 is deep into the concrete base 3 to a certain depth. There are multi-step steps 7 on the slope of roadbed 1, foam light soil 8 is poured between the baffle and the existing roadbed slope, and the pouring height of foam light soil 8 is flush with the design elevation of the roadbed.
[0042] figure 1 Shown is the schematic diagram of the structure when the edge of the widen...
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The invention provides a river-adjacent existing roadbed embankment wall section widening structure and a construction method, a concrete base is poured along the sideline of a widened roadbed, a concrete prefabricated baffle is arranged on the base along the longitudinal direction of the roadbed, and a vertical rod and a pull rod for reinforcing the baffle are arranged on the base; a plurality of steps are arranged on the existing roadbed slope, and foam light soil is filled between the baffles and the roadbed slope. The requirement of the baffles for bearing of the foundation is low, and when the broadened roadbed sideline is located on the side slope of the existing embankment, damage to the existing embankment is small; when the broadened roadbed side boundary coincides with the position of the existing embankment wall or is located in the river channel, the existing embankment wall does not need to be dismantled, the existing embankment wall can be fully utilized, treatment of the river channel foundation is avoided, construction investment can be reduced, and stability of the existing embankment is guaranteed.
Description
technical field [0001] The invention patented the technical field of road construction relates to the widening construction of the existing roadbed, in particular to a widening structure and a construction method of the embankment wall section of the existing roadbed near a river. Background technique [0002] In the process of reconstruction and expansion of existing roads, for the widening of the existing embankment and embankment sections near the river, new shoulder walls are generally used to support and fill soil, and steps are set on the slope, and the filling is rolled and reinforced, and geogrids are laid. Strengthen the connection between the old and new subgrades and avoid uneven settlement. This method mainly has the following problems: [0003] 1. The filler of the widened part is generally made of soil filler. For special parts such as the original ground, the junction of the top surface of the steps and the top surface of the embankment, it is necessary to us...
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IPC IPC(8): E01C3/00E01C3/04E02B3/10E02B3/12E02D5/28E02D5/74E03F5/04E03F3/02E03F3/04
CPCE01C3/00E01C3/04E02B3/10E02B3/12E02D5/28E02D5/74E03F5/04E03F3/02E03F3/04
Inventor宋冰董俭召刘永松刘波章儒愿杨锋
OwnerROAD & BRIDGE INT