Special test mold for testing maximum dry density of aeolian sand roadbed constructed by water sinking method
By setting drainage holes and drainage switches on the inner cylinder of the compaction mold, the problem of inaccurate determination of the maximum dry density of aeolian sand subgrade in water-settlement construction is solved, providing a simple, quick and easy-to-operate test mold that ensures the accuracy of the measurement results and the portability of the mold.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2026-03-27
AI Technical Summary
Existing compaction molds cannot drain excess water in time when determining the maximum dry density of aeolian sand subgrade constructed by water settling method, resulting in inaccurate measurements.
Design a compaction molding die with drainage function. By evenly distributing drainage holes on the inner cylinder and equipping it with a drainage switch, ensure that the aeolian sand after water settling is drained of excess water in a timely manner during the vibration compaction process. Utilize the cavity between the outer and inner cylinders to store water, and control the discharge through the drainage switch.
It enables accurate determination of the maximum dry density of aeolian sand roadbed, is simple and quick to operate, and the mold is lightweight and easy to transport.
Smart Images
Figure CN224051718U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the special test mould for the maximum dry density test of aeolian sand roadbed for water sinking construction belongs to engineering experimental equipment technical field. BACKGROUND
[0002] The water sinking method of aeolian sand is a construction method for aeolian sand roadbed, and its main principle is to continuously and uniformly sprinkle or irrigate water on the surface of aeolian sand filling, and to make sand particles sink under the action of gravity by the carrying action of water flow, so as to achieve the effect of continuous compaction and improve the compaction degree and bearing capacity of loose sand body.
[0003] At present, the commonly used method in the indoor test of maximum dry density is the compaction method and the vibration method, wherein the vibration method includes the vibration table method and the surface vibration compaction instrument method. The surface vibration compaction instrument method can be used to determine the indoor maximum dry density of aeolian sand roadbed for water sinking construction, and this method is suitable for determining the indoor maximum dry density of incohesive soil. However, the current compaction mold cannot timely discharge the excess water in the aeolian sand after water sinking from the sand body during the compaction process, and cannot meet the drainage requirement, so that the indoor maximum dry density of aeolian sand roadbed for water sinking construction cannot be conveniently and accurately determined.
[0004] Therefore, the utility model provides a compaction forming mold with a drainage function, which can timely discharge the excess water in the aeolian sand during the compaction process by uniformly arranging drainage holes on the inner cylinder. UTILITY MODEL CONTENTS
[0005] The utility model provides a simple, convenient, fast and easy-to-operate special test mould for the maximum dry density test of aeolian sand roadbed for water sinking construction after water sinking, which solves the problems in the prior art.
[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:
[0007] The special test mould for the maximum dry density test of aeolian sand roadbed for water sinking construction is composed of a steel mold bottom plate, a steel mold inner cylinder, a steel mold outer cylinder, a barrel inner cushion block, a steel mold sleeve ring, a fixing frame, a fastening bolt, a drainage port and a drainage switch, the steel mold inner cylinder and the steel mold outer cylinder are sleeved on the steel mold bottom plate, the steel mold sleeve ring is sleeved on the steel mold inner cylinder and the steel mold outer cylinder, the fixing frame is linked with the steel mold bottom plate, the fastening bolt is used to fix the steel mold sleeve ring, the steel mold inner cylinder and the steel mold outer cylinder on the steel mold bottom plate, the steel mold inner cylinder is uniformly arranged with water-permeable small holes, the water separated out after the vibration compaction of the aeolian sand after water sinking is stored in the cavity between the steel mold inner cylinder and the steel mold outer cylinder, and the water stored in the cavity between the steel mold inner cylinder and the steel mold outer cylinder can be controlled by the drainage switch and discharged from the drainage port.
[0008] The steel inner cylinder is provided with uniform water drainage holes, and water separated from the wind-blown sand after vibration and compaction is stored in the cavity between the steel inner cylinder and the steel outer cylinder.
[0009] The steel outer cylinder is provided with a drainage opening, and the drainage opening is provided with a drainage switch for controlling the drainage of the water stored in the cavity between the steel inner cylinder and the steel outer cylinder.
[0010] The steel bottom plate is provided with a groove for connecting the steel inner cylinder and the steel outer cylinder.
[0011] The steel sleeve ring is provided with a groove for connecting the steel outer cylinder.
[0012] The drainage opening and the drainage switch are connected through threads, are detachable devices, and the drainage switch is replaceable.
[0013] The working principle and process are as follows: the steel inner cylinder and the steel outer cylinder are sleeved on the steel bottom plate, the barrel inner pad is placed at the bottom of the steel inner cylinder, the steel sleeve ring is sleeved on the steel inner cylinder and the steel outer cylinder, the steel sleeve ring is fixed with the fixing frame through fastening bolts, the steel inner cylinder, the steel outer cylinder and the steel sleeve ring are fixed on the steel bottom plate, two layers of filter paper are placed on the barrel inner pad at the bottom of the steel inner cylinder, the wind-blown sand after water sinking is loaded into the steel inner cylinder, the compaction hammer is pressed on the wind-blown sand in the steel inner cylinder, after the working time of the vibration motor is adjusted through the control electric appliance, the surface vibration compaction instrument is started, the drainage switch on the steel outer cylinder is opened after vibration, the water stored in the cavity between the steel inner cylinder and the steel outer cylinder is drained, the sleeve is removed, the surface of the test cylinder is scraped flat, the wind-blown sand around the test cylinder is washed with a brush, and the test mold bottom plate is wiped clean.
[0014] The utility model has the following advantages and beneficial effects:
[0015] The test mold for testing the maximum dry density of wind-blown sand for water sinking construction can test the maximum dry density of the wind-blown sand after water sinking, is simple to manufacture, simple and convenient to operate, does not have high requirements on the operator, can quickly perform tests, the steel inner cylinder is uniformly provided with drainage holes, which has a great effect on the separation of water from the wind-blown sand after water sinking during compaction, the maximum dry density value of the wind-blown sand after water sinking is more accurate, the steel outer cylinder is provided with a drainage opening, and the drainage opening is provided with a drainage switch for controlling the drainage of the water separated from the wind-blown sand, the test cylinder is light in weight, and is convenient to load, unload and transport. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0017] Figure 1 It is an axial view of the special test mold for testing the maximum dry density of the aeolian sand roadbed for water sinking method construction of the present application.
[0018] Figure 2 It is a cross-sectional view of the special test mold for testing the maximum dry density of the aeolian sand roadbed for water sinking method construction of the present application.
[0019] Figure 3 It is a structural schematic view of the inner steel mold cylinder in the special test mold for testing the maximum dry density of the aeolian sand roadbed for water sinking method construction of the present application.
[0020] Figure 4 It is a structural schematic view of the outer steel mold cylinder in the special test mold for testing the maximum dry density of the aeolian sand roadbed for water sinking method construction of the present application.
[0021] Figure 5 It is a structural schematic view of the lower view of the steel mold sleeve ring in the special test mold for testing the maximum dry density of the aeolian sand roadbed for water sinking method construction of the present application.
[0022] Figure 6 It is a structural schematic view of the axial view of the steel mold bottom plate and the fixing frame in the special test mold for testing the maximum dry density of the aeolian sand roadbed for water sinking method construction of the present application.
[0023] In the figure: 1-steel mold sleeve ring; 2-inner steel mold cylinder; 201-permeable small hole; 3-outer steel mold cylinder; 301-drainage port; 4-steel mold bottom plate; 5-drainage port; 6-fixing frame; 7-fastening bolt; 8-bucket inner pad. DETAILED DESCRIPTION
[0024] The specific embodiments of the present application will be further described below in combination with the drawings. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation of the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.
[0025] REFERENCE Figure 1 , Figure 2 and Figure 3The axial view schematic diagram, the cross section schematic diagram and the steel mould inner cylinder structure schematic diagram of the special test mould for testing the maximum dry density of the aeolian sand roadbed for water sinking construction are shown, the special test mould for testing the maximum dry density of the aeolian sand roadbed for water sinking construction is composed of a steel mould bottom plate, a steel mould inner cylinder, a steel mould outer cylinder, a barrel inner cushion, a steel mould sleeve ring, a fixing frame, fastening bolts, a drainage port and a drainage switch, the steel mould inner cylinder and the steel mould outer cylinder are sleeved on the steel mould bottom plate, the steel mould sleeve ring is sleeved on the steel mould inner cylinder and the steel mould outer cylinder, the fixing frame is linked with the steel mould bottom plate, and the fastening bolts are used for fixing the steel mould sleeve ring and the steel mould inner cylinder and the steel mould outer cylinder on the steel mould bottom plate, the steel mould inner cylinder is uniformly distributed with water permeable small holes, and the water separated out from the aeolian sand after vibration compaction is stored in the cavity between the steel mould inner cylinder and the steel mould outer cylinder, and the water stored in the cavity between the steel mould inner cylinder and the steel mould outer cylinder can be controlled by the drainage switch and discharged from the drainage port.
[0026] The inner diameter of the steel mould inner cylinder (2) is 150mm, the height is 170mm, and the wall thickness is 10mm. The inner diameter of the steel mould outer cylinder (3) is 220mm, the height is 170mm, and the wall thickness is 10mm. The sleeve inner diameter of the steel mould sleeve ring (1) is 150mm, and the wall thickness is 10mm; the inner diameter of the groove on the extension plate is 220mm, the outer diameter is 240mm, and the plate thickness is 10mm. The inner groove diameter of the steel mould bottom plate (4) is 170mm, the groove depth is 3mm; the outer groove inner diameter is 220mm, the outer diameter is 240mm, and the groove depth is 3mm; the diameter of the steel mould bottom plate (4) is 320mm, and the plate thickness is 20mm. The diameter of the fixing frame (5) is 10mm, the height is 210mm, and there are two pieces in total. The diameter of the inner cylinder cushion (8) is 150mm, and the height is 20mm.
[0027] The working principle and use method of the utility model are further described below in combination with the drawings and specific embodiments.
[0028] First step: the steel mould bottom plate 4, the steel mould inner cylinder 2, the steel mould outer cylinder 3, the barrel inner cushion 8 and the steel mould sleeve ring are cleaned first, and no other soil sample substances are ensured; the steel mould inner cylinder 2 and the steel mould outer cylinder 3 are sequentially placed into the groove of the steel mould bottom plate 4 and connected; the barrel inner cushion 8 is placed into the steel mould inner cylinder 2, and two layers of filter paper are prevented on the barrel inner cushion 8; the steel mould sleeve ring 1 is sleeved into the fixing frame 6 and connected with the steel mould inner cylinder 2 and the steel mould outer cylinder 3, and is fixed by the fastening bolt 7.
[0029] Second step: the aeolian sand after drying is filled into the steel mould inner cylinder 2 at one time, and the height of 3cm from the top of the steel mould sleeve ring 1 is enough.
[0030] Third step: water is slowly added in the sample until the water with the height of about 2cm is reserved on the surface of the sample. The sand sample will be further compacted in the process of adding water, and appropriate sample should be added according to the sample height so that the sample is about 1-2cm higher than the steel mould inner cylinder 2.
[0031] Fourth step: turn on the vibration compactor, continuously vibrate for a certain time, and water will flow out of the drain hole 201 of the steel inner cylinder 2 into the cavity of the steel inner cylinder 2 and the steel outer cylinder 3 during the compaction process.
[0032] Fifth step: after vibration, open the drain switch of the drain hole 301 to drain the water in the cavity of the steel inner cylinder 2 and the steel outer cylinder 3, loosen the fastening bolt 7, take off the steel sleeve ring 1 and the steel outer cylinder 3, scrape the surface of the steel inner cylinder 2, wash the wind-blown sand around the steel inner cylinder 2, and wipe clean the test mold base 4. At this time, the test piece has been prepared and can be demolded for testing.
[0033] The embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and still fall within the protection scope of the utility model.
Claims
1. A special test mold for testing the maximum dry density of aeolian sand subgrade for water sinking construction, characterized in that: The utility model discloses a steel mould, which is composed of a steel mould ring, a steel mould inner cylinder, water-permeable small holes, a steel mould outer cylinder, a steel mould bottom plate, barrel inner pad, a fixing frame, fastening bolts, a drainage port and a drainage switch.
2. The special test mold for testing the maximum dry density of aeolian sand subgrade for water laying construction according to claim 1, characterized in that: The steel mould inner cylinder is evenly provided with water-permeable small holes, and water separated out from the wind-blown sand after vibration compaction is stored in the cavity between the steel mould inner cylinder and the steel mould outer cylinder.
3. The special test mold for testing the maximum dry density of aeolian sand subgrade for water laying construction according to claim 1, characterized in that: The steel mould outer cylinder is provided with a drainage port, which is used for installing a drainage switch to discharge the water stored between the steel mould inner cylinder and the steel mould outer cylinder.
4. The special test mold for testing the maximum dry density of aeolian sand subgrade for water laying construction according to claim 3, characterized in that: The drainage port is provided with a drainage switch, which is used for controlling the discharge of the water stored between the steel mould inner cylinder and the steel mould outer cylinder at a suitable time.
5. The special test mold for testing the maximum dry density of aeolian sand subgrade for water laying construction according to claim 4, characterized in that: The drainage port and the drainage switch are connected through threads, and they are detachable and replaceable.