Small low-liquid-limit mucky canal lining structure
By combining cast-in-place concrete and prefabricated sludge channel construction in small, low liquid limit sludge channels, the problems of low geological bearing capacity and complex slope lining are solved, and efficient and stable channel lining effect is achieved.
Patent Information
- Application Number
- CN202420928058.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The prior art is difficult to effectively solve the problems of low geological bearing capacity and complex slope lining construction in the construction of small, low-liquid-liquid sludge channels, especially in the case of poor construction environment and difficult access to machinery and equipment.
Channel lining is carried out by combining cast-in-place concrete and prefabricated slabs. The base plate lining is cast-in-place concrete, and the slope lining is lined with multiple rows of horizontally paved prefabricated slab lining with equal spacing. Each part is connected through the cast-in-place concrete layer, and cold drawing and mortar smoothing layer are added to enhance structural stability.
Channel lining under low geological bearing capacity and complex slope construction conditions is realized, construction costs are reduced, construction efficiency and quality are improved, and it is suitable for small, low-liquid-limited sludge channels.
Smart Images
Figure CN222594758U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of channel construction, in particular to a small low-liquid-limit muddy channel lining structure. Background Art
[0002] At present, the construction of lined channels can be divided into two types: cast-in-place and precast lining. Among them, the more advanced lining construction method at home and abroad, cast-in-place, mostly adopts channel lining machine construction. Its advantage is one-time molding, which greatly reduces the slope lining construction time and improves construction efficiency. The disadvantage is that it needs to be customized according to the channel slope, and the cost investment is relatively large. For low liquid limit mud channels, due to geological reasons, the construction environment and road transportation are poor, and it is difficult for machinery and equipment to enter the site, which is not suitable for frequent cast-in-place construction.
[0003] The advantages of the precast board lining method are simple construction, easy operation, and relatively common. The first disadvantage is that the size is limited. If the precast board is too large, it will be inconvenient for construction workers to carry, lay and reduce the loss rate. If it is too small, it will lead to too many joints between the concrete precast boards and form penetration problems. In addition, the precast board size should not be too many. Second, the design requirements for the mold are high. The quality and performance of the mold directly affect the product quality of the concrete precast board. If the construction period is tight, a large number of molds will be required, which will increase the construction cost.
[0004] Small low liquid limit muddy channels are not suitable for in-situ casting or precast lining due to their low geological bearing capacity, high water content and small scale. It is necessary to comprehensively consider their characteristics and design a new lining structure for small low liquid limit muddy channels. Utility Model Content
[0005] The utility model aims to address the deficiencies of the prior art and thus provide a small low-liquid-limit muddy channel lining structure that overcomes the problems of low geological bearing capacity and complex slope lining construction.
[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a small low-liquid-limit muddy channel lining structure, including a bottom plate lining, two side slope linings and a plurality of connecting parts;
[0007] The bottom plate lining is a cast-in-place concrete lining layer, and the slope lining is a precast slab lining with multiple rows of horizontal paving at equal intervals;
[0008] The bottom plate lining and the lowest row of precast plate linings and two adjacent rows of precast plate linings are connected via connecting parts, and the connecting parts are cast-in-place concrete layers.
[0009] Preferably, in the cast-in-place concrete lining layer of the base plate lining, an expansion joint is arranged every 6-8 m, the expansion joint is a narrow joint with a width of 1-2 cm, and the expansion joint is filled with a high-density polyethylene closed-cell foam board.
[0010] Preferably, a gravel drainage ditch is arranged at intervals of 6-8 m in the cast-in-place concrete lining layer of the bottom plate lining, and drainage holes are opened on the upper panel of the gravel drainage ditch, and the drainage holes are filled with gravel.
[0011] Preferably, the prefabricated panels in the slope lining are prefabricated hollow panels, and a plurality of cold-drawn wires are built into the bottom surface area of the prefabricated panels.
[0012] Preferably, the cast-in-place concrete lining layer of the base plate lining includes a C15 cast-in-place concrete layer with a thickness of ≥12 cm.
[0013] Preferably, a drainage ditch is arranged at intervals of 24 m in the horizontal direction of the slope lining, and the drainage ditch is filled with sand and gravel.
[0014] Preferably, the precast plate lining in the slope lining is provided with an expansion joint at intervals of 6-8 m in the horizontal direction, and there is no filler in the expansion joint.
[0015] Preferably, a mortar smoothing layer is laid on the upper surface of the precast board lining in the slope lining.
[0016] Preferably, a plurality of steel bars are laid in the connection portion, and the steel bars are laid along the channel width direction and connected to the bottom plate lining or precast plate lining at both ends.
[0017] Preferably, the specifications of the prefabricated panels are consistent.
[0018] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the utility model has the following advantages:
[0019] The lining construction of the entire channel is completed by combining cast-in-place concrete and precast slabs. Due to the high moisture content of the channel bottom, the cast-in-place concrete can fully absorb and utilize the moisture on the channel bottom. The cast-in-place concrete has strong integrity and can form a reinforced road surface after paving. Transport vehicles, tools, etc. can be transferred to the interior of the channel to improve construction convenience.
[0020] Furthermore, the slope is paved by means of precast slabs prepared on site, and cold drawing is added to the ground of the precast slabs. When paving, the slope shape is not taken into consideration, and precast slabs of uniform specifications are used for flat laying. The connections between two adjacent rows of precast slabs and between the bottom row of precast slabs and the cast-in-place concrete lining at the bottom of the channel are supplemented by cast-in-place concrete, so that the entire channel bottom and both sides form a whole, meeting the requirements of the integrity of the channel lining and the requirements of structural stability.
[0021] This structural situation is conducive to construction, can overcome the problems of low geological bearing capacity and complex slope lining construction, and reduce construction costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a cross-sectional view of a small low liquid limit muddy channel lining structure in the utility model.
[0023] Figure 2 It is a plan view of a small low liquid limit muddy channel lining structure in the utility model.
[0024] In the figure: 1. Bottom plate lining; 2. Slope lining; 3. Connection; 4. Expansion joint; 5. Gravel drainage ditch; 6. Drainage ditch. DETAILED DESCRIPTION
[0025] The technical solution of the utility model is further described in detail below through specific implementation methods.
[0026] like Figure 1 and Figure 2 As shown, a small low liquid limit muddy channel lining structure includes a bottom plate lining 1, two side slope linings 2 and a plurality of connecting parts 3.
[0027] The bottom plate lining 1 is a cast-in-place concrete lining layer, and the slope lining 2 is a prefabricated slab lining with multiple rows of horizontal paving at equal intervals.
[0028] The bottom plate lining 1 and the lowest row of precast plate lining 2 and two adjacent rows of precast plate lining 2 are connected by a connecting part 3. The connecting part 3 is a cast-in-place concrete layer. A plurality of steel bars are laid in the connecting part. The steel bars are laid along the width of the channel and connected to the bottom plate lining or precast plate lining at both ends.
[0029] In this embodiment, in the cast-in-place concrete lining layer of the base plate lining 1, the cast-in-place concrete lining layer of the base plate lining includes a C15 cast-in-place concrete layer with a thickness of ≥12 cm.
[0030] An expansion joint 4 is set every 6-8m. The expansion joint 4 is a narrow gap with a width of 1-2cm. The expansion joint 4 is filled with high-density polyethylene closed-cell foam board to fill the gap. The cast-in-place concrete lining layer itself can harden the road surface and strengthen the bottom of the channel. However, in order to overcome the deformation problem, expansion joints are set. In order to prevent leakage and corrosion caused by the high moisture content below, it is necessary to fill the gap with water-proof filling.
[0031] Furthermore, a gravel drainage ditch 5 is arranged at intervals of 6-8 m in the cast-in-place concrete lining layer of the bottom plate lining 1, and drainage holes are opened on the upper panel of the gravel drainage ditch 5, which are filled with gravel to drain the accumulated water in the channel.
[0032] The prefabricated panels in the slope lining 2 are prefabricated hollow panels, and the specifications of the prefabricated panels are all consistent. A number of cold-drawn wires are built into the bottom area of the prefabricated panels 2 to strengthen the slope lining structure. Especially during the transfer and transportation of the hollow panels, the underlying structure contacts the slope first and is easily broken. Adding cold-drawn wires can enhance the structural strength.
[0033] The slope lining 2 is provided with a drainage ditch 6 at intervals of 24m in the horizontal direction, and the drainage ditch is filled with gravel. The precast board lining in the slope lining 2 is provided with an expansion joint at intervals of 6-8m in the horizontal direction, and there is no filler in the expansion joint. Since the slope leakage problem is not prominent, no filler is provided. A mortar smoothing layer is laid on the upper surface of the precast board lining in the slope lining, which protects the precast board on the one hand and prevents foreign objects from invading the gap on the other hand.
[0034] The scheme was verified in the civil engineering and installation construction project of the Xizi Canal Extension Section of the Pengxi Chuanshan Irrigation Project in Sichuan Province. The water filling channel of the Xizi Canal Extension Section is arranged at the tail of the Baihelin Reservoir. The channel is a trapezoidal channel excavated from earthwork. Since the foundation is silty soil, the slope of the channel is 1:3, the excavation depth varies from 2 to 7.5m, the local soil layer is under-consolidated and thixotropic, the soil engineering properties are poor, the soil bearing capacity is low, the water content is high, and the compression deformation is large. From the perspective of engineering geology, it is a typical low liquid limit silty channel construction. From the perspective of structural design, the channel lining section is small, up to 2561.7m, and the lining thickness is 12cm. It is a typical small-section long-distance thin-walled channel structure.
[0035] The original design adopted cast-in-place construction. Due to the low liquid limit silty channels, which are soft, plastic, fluid, and unstable, their strength will decrease rapidly or even become fluid after being disturbed and damaged to a certain extent, which can easily cause engineering accidents. Taking into account the construction environment and poor road transportation, it is difficult for machinery and equipment to enter the site, and it is not suitable for frequent cast-in-place construction. After extensive investigation and discussion by technical personnel, combined with the tight construction schedule of the water filling channel of this project, the layout of the on-site roads and slag yard, etc., a comprehensive study was conducted. Finally, the construction method of cast-in-place bottom slab concrete + paving lining of prefabricated hollow slabs on the slope + supplementary connection parts was adopted. This method effectively solved the problems of transportation and lining difficulties of silty channel concrete, and solved the problems of thin slab walls, easy breakage, small and long channel sections, which are common in the construction of prefabricated slabs. It effectively improved the construction speed and ensured the construction quality.
[0036] Finally, it should be noted that: The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.
Claims
1. A small low liquid limit muddy channel lining structure, characterized by: It includes a bottom plate lining, two side slope linings and several connecting parts; The bottom plate lining is a cast-in-place concrete lining layer, and the slope lining is a precast slab lining with multiple rows of horizontal paving at equal intervals; The bottom plate lining and the lowest row of precast plate linings and two adjacent rows of precast plate linings are connected via connecting parts, and the connecting parts are cast-in-place concrete layers.
2. The small-scale low liquid limit muddy channel lining structure according to claim 1 is characterized by: In the cast-in-place concrete lining layer of the base plate lining, an expansion joint is arranged every 6-8m, and the expansion joint is a narrow joint with a width of 1-2cm. The expansion joint is filled with a high-density polyethylene closed-cell foam board.
3. The small-scale low liquid limit muddy channel lining structure according to claim 2 is characterized by: A gravel drainage ditch is arranged at intervals of 6-8m in the cast-in-place concrete lining layer of the bottom plate lining, and drainage holes are opened on the upper panel of the gravel drainage ditch, and the drainage holes are filled with gravel.
4. The small-scale low liquid limit muddy channel lining structure according to claim 3 is characterized by: The prefabricated panels in the slope lining are prefabricated hollow panels, and a plurality of cold-drawn wires are built into the bottom surface area of the prefabricated panels.
5. The small-scale low liquid limit muddy channel lining structure according to claim 4 is characterized in that: The cast-in-place concrete lining layer of the base plate lining includes a C15 cast-in-place concrete layer with a thickness of ≥12 cm.
6. The small-scale low liquid limit muddy channel lining structure according to claim 5 is characterized by: The slope lining is provided with a drainage ditch at intervals of 24 m in the horizontal direction, and the drainage ditch is filled with sand and gravel.
7. The small-scale low liquid limit muddy channel lining structure according to claim 6 is characterized by: The prefabricated board lining in the slope lining is provided with an expansion joint at intervals of 6-8m in the horizontal direction, and there is no filler in the expansion joint.
8. The small-scale low liquid limit muddy channel lining structure according to claim 7 is characterized in that: A mortar smoothing layer is laid on the upper surface of the prefabricated board lining in the slope lining.
9. The small-scale low liquid limit muddy channel lining structure according to claim 8 is characterized by: A plurality of steel bars are laid in the connection part, and the steel bars are laid along the width direction of the channel and connected with the bottom plate lining or prefabricated plate lining at both ends.
10. The small-scale low liquid limit muddy channel lining structure according to claim 9 is characterized in that: The specifications of the prefabricated panels are all consistent.