Mould for indoor maximum dry density test for aeolian sand roadbed water sinking method construction

Abstract

The utility model belongs to the technical field of engineering experiment equipment, and relates to an indoor maximum dry density test mold for aeolian sand roadbed water sinking method construction, which consists of a base (1), a bottom plate (2), a test cylinder (3), a sleeve (4), a fixing frame (5) and a fastening bolt (6), and is characterized in that the test cylinder (3) and the bottom plate (2) are sleeved on the base (1), the sleeve (4) is sleeved on the test cylinder (3), and the fixing frame (5) is sleeved on the bottom plate (2). The fixing frame (5) is connected with the base (1), and the fastening bolt (6) is used for fixing the sleeve (4) and the test barrel (6) on the base (1). The mold for the indoor maximum dry density test of the aeolian sand roadbed constructed by the water precipitation method is simple to operate, water can be smoothly discharged out of a test piece in the compaction process of the indoor maximum dry density test of the aeolian sand roadbed constructed by the water precipitation method, the maximum dry density of aeolian sand is favorably improved, and the compaction degree is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of mould for indoor maximum dry density test of aeolian sand subgrade water sinking method construction.It belongs to engineering experimental equipment technical field. BACKGROUND

[0002] Aeolian sand subgrade water sinking method construction is conducive to continuous operation, reduces pumping artificial, mechanical equipment investment, sand can reach maximum compacting effect under the penetration of water, with the characteristics of high time efficiency, time saving.Water sinking method is to make subgrade compact by using the self-weight and adsorption of aeolian sand, adopts the way of water filling, vibration compaction in construction, large sand particles form skeleton, and water penetration drives small particles to fill gaps, thereby improving compactness.

[0003] Currently, the test methods for indoor determination of aeolian sand maximum dry density mainly include heavy compaction method, surface vibration compaction, bottom vibration table method, etc., but in actual engineering, the characteristics of strong permeability of aeolian sand need to be utilized to achieve compacting effect, the existing test methods and moulds cannot effectively penetrate water in aeolian sand test piece, do not conform to the actual engineering situation, and cannot meet the technical requirements of water sinking method construction.

[0004] In the determination of aeolian sand subgrade indoor maximum dry density test of water sinking method construction, due to the penetration of aeolian sand, excess water in aeolian sand is discharged from sand body during compaction process, and the traditional test mould cannot effectively remove excess water in aeolian sand. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of mould for indoor maximum dry density test of aeolian sand subgrade water sinking method construction, simple operation, water can be successfully discharged from test piece during aeolian sand subgrade indoor maximum dry density test compaction process of water sinking method construction, which helps to improve aeolian sand maximum dry density and improve compactness, is a mould that can discharge water from test tube in the process of vibration compaction method determination indoor maximum dry density test, solves the problem that existing technology cannot meet the technical requirements of indoor maximum dry density test when aeolian sand subgrade water sinking method construction.

[0006] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0007] The utility model relates to a kind of indoor maximum dry density test mould of aeolian sand roadbed water sinking method construction, mainly by base, bottom plate, test tube, sleeve, fixing frame and fastening bolt composition.The base is equipped with support table, for supporting bottom plate and test tube and storing the water discharged, the test tube and the bottom plate are sleeved on the base, the sleeve is sleeved on the test tube, while base is equipped with two fixing frames for fixing test tube to keep still in compaction process, and fixing frame is linked with base as a whole.Base and test tube are placed on the support table of base, and the base is sleeved into the bottom of test tube.The sleeve is connected with test tube, and the outer side is equipped with sleeve ring, sleeve ring is sleeved on fixing frame and is fixed with fastening bolt, and the fastening bolt is used to fix the sleeve and test tube on the base.

[0008] Further, the base can store the water discharged in compaction process in support table, prevent water from flowing on test table;The base support table is composed of two circular rings, the outer circular ring is provided with groove for supporting and fixing test tube, and the inner circular ring is used for supporting bottom plate, and the bottom plate and test tube are placed on the support table.

[0009] Further, the inner bottom of base support table is provided with drain hole for discharging water in inner ring, and the outer bottom is provided with drain plug, which is plugged during test, and can be removed after test to connect water pipe to discharge water in support table.

[0010] Further, the bottom plate and test tube are placed on the base support table, the test tube is sleeved on the bottom plate, the bottom plate is provided with uniformly distributed small holes, to ensure that water is discharged smoothly during test.

[0011] Further, the bottom and upper part of test tube are provided with grooves for connecting base and sleeve.

[0012] Further, the bottom of sleeve is provided with groove for connecting test tube, and the outer wall of sleeve is provided with sleeve ring on both sides, which can be tightly sleeved with fixing frame connected on base and fixed with fastening bolt.

[0013] The utility model has the following advantages and beneficial effects:

[0014] The utility model relates to a kind of indoor maximum dry density test mould of aeolian sand subgrade water sinking method construction, water is discharged from the compacting process by improving mould base and bottom plate, and the water discharged is temporarily stored in support table inside, effectively ensure that the water discharged does not flow into test table from test mould bottom, ensure that water effectively flows in aeolian sand test piece, meet the characteristics that aeolian sand subgrade is more permeable when water sinking method construction, satisfy the technical requirement of aeolian sand subgrade water sinking method construction, this method can guarantee that the water injection in aeolian sand exceeds the maximum moisture content of aeolian sand when indoor maximum dry density is determined, can effectively improve the maximum dry density of aeolian sand subgrade, verify the effectiveness of water sinking method construction, improve aeolian sand subgrade compaction degree. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the utility model embodiment or the technical scheme in prior art, the following will briefly introduce the drawing needed to be used in embodiment or prior art description, obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor.

[0016] Figure 1 It is the whole structure schematic diagram of the utility model indoor maximum dry density test mould of aeolian sand subgrade water sinking method construction;

[0017] Figure 2 It is the sectional view of the utility model indoor maximum dry density test mould of aeolian sand subgrade water sinking method construction;

[0018] Figure 3 It is the plan view of the utility model indoor maximum dry density test mould of aeolian sand subgrade water sinking method construction;

[0019] Figure 4 It is the base structure schematic diagram in the utility model indoor maximum dry density test mould of aeolian sand subgrade water sinking method construction;

[0020] Figure 5 It is the bottom plate structure schematic diagram in the utility model indoor maximum dry density test mould of aeolian sand subgrade water sinking method construction.

[0021] In the drawing: 1-base;101-support table;102-drainage plug;2-bottom plate;3-test tube;4-sleeve;401-sleeve collar;5-fixing frame;6-fastening bolt. DETAILED DESCRIPTION

[0022] The utility model discloses a further description of the specific implementation of the utility model below in conjunction with the drawings. It needs to be explained here that the description of these implementation is used to help understanding the utility model, but does not constitute the limitation to the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] Referring to Figure 1 , Figure 2 and Figure 3 The whole structure schematic diagram, sectional view and top view of the indoor maximum dry density test mold for aeolian sand subgrade water sinking method construction, a indoor maximum dry density test mold for aeolian sand subgrade water sinking method construction, including base 1, bottom plate 2, test tube 3 and sleeve 4, the base 1 diameter 300mm, high 30mm, and is equipped with the protruding support table 101, the support table 101 is divided into two layers, and the outer side inner diameter is 140mm, and the wall thickness is 20mm, and the inner side inner diameter is 50mm, and the wall thickness is 10mm;The bottom plate 2 is 150mm in diameter, 10mm in height, and is provided with uniformly distributed drainage holes with a diameter of 2mm;The test tube 3 is 150mm in inner diameter, 10mm in wall thickness and 170mm in height, and the top and bottom of the test tube 3 are provided with grooves for connecting with the support table 101 and the sleeve 4;The sleeve 4 is 150mm in inner diameter, 10mm in wall thickness and 50mm in height.

[0024] The working principle and use method of the utility model are further described in conjunction with the drawings and specific embodiments.

[0025] First step: the base 1, bottom plate 2, test tube 3 and sleeve 4 of the mold are cleaned first, ensure that there is no remaining soil sample material;The base 1, test tube 3 and sleeve 4 are assembled and connected with each other in the way of concave-convex combination;The bottom plate 2 is placed in the test tube 3 and placed on the support table 101, and two layers of filter paper are placed on the bottom plate 2;Ensure that the drain plug 102 is plugged tightly without water leakage;The sleeve sleeve ring 401 is sleeved into the fixing frame 5, and is fixed with the fastening bolt 6.

[0026] Second step: the dried aeolian sand is filled into the test tube 3 at one time, and the height of 3cm from the top of the sleeve 4 can be reached.

[0027] Third step: slowly add water in the test sample until the water reserved about 2cm high on the surface of the test sample.

[0028] Fourth step: open the vibration compactor, and continuously vibrate for a certain time, and the water will flow out from the drainage hole of the bottom plate 2 and flow into the gap of the support table 101 during the compaction process.

[0029] Fifth step: after the vibration is over, the fastening bolt 6 is loosened, the sleeve 4 is taken off, the surface of the test cylinder 3 is scraped flat, the wind deposited sand around the test cylinder 3 is washed, the water in the support table 101 is drained through the drainage plug 102, and the test mould base 1 is wiped clean. At this time, the test piece has been prepared and can be demoulded for testing.

[0030] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and still fall within the protection scope of the present application.

Claims

1. A mold for a maximum dry density test in a construction of a water settlement method of a aeolian soil subgrade, characterized by: The utility model relates to a test device for soil compaction test, which is composed of a base (1), a bottom plate (2), a test cylinder (3), a sleeve (4), a fixing frame (5) and a fastening bolt (6), wherein the test cylinder (3) and the bottom plate (2) are sleeved on the base (1), the sleeve (4) is sleeved on the test cylinder (3), the fixing frame (5) is linked with the base (1), and the fastening bolt (6) is used for fixing the sleeve (4) and the test cylinder (3) on the base (1).

2. The indoor maximum dry density test mold for the aeolian sand subgrade water settlement method construction according to claim 1, characterized in that: The base (1) is provided with a support table (101), and the bottom plate (2) and the test cylinder (3) are arranged on the support table (101).

3. The mold for testing the maximum dry density of aeolian soil subgrade water settlement method according to claim 1, characterized in that: The bottom plate (2) is provided with uniformly distributed drainage holes, which can drain the excess water in the test piece during the compaction process, and the radius of the bottom plate (2) is smaller than the inner diameter of the test cylinder (3) and the sleeve (4), which is arranged on the support table (101) during use.

4. The indoor maximum dry density test mold for the aeolian sand subgrade water settlement method construction according to claim 2, characterized in that: The support table (101) has a height to store the water drained during the test in the support table (101).

5. The indoor maximum dry density test mold for the aeolian sand subgrade water settlement method construction according to claim 2, characterized in that: The support table (101) is composed of two inner and outer rings, the inner bottom is provided with drainage holes for draining water in the inner ring, and the outer bottom is provided with a drainage plug (102), which can drain the water in the support table (101) after being removed.

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