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Typical example questions.

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Sand: Stone: Water: Amount of Concrete Material per Cubic Meter:

Cement water sand and gravel construction mix ratio:

Ash: Water: Sand: Stone.

The trial, adjustment and determination of the self-compacting concrete mix ratio shall comply with the following provisions:

1. The raw materials actually used in the project should be used in the concrete trial, and the minimum mixing capacity of each tray of concrete should not be less than 25L.

2. During the trial matching, the first test mixing should be carried out, first check the mandatory indicators of the self-compacting performance of the mixture, and then check the optional indicators of the self-compacting performance of the mixture. When the self-compacting performance of the mixture obtained from the test mixing cannot meet the requirements, the amount of cementitious material, the amount of admixture or the volume fraction of sand should be adjusted under the principle that the water-glue ratio remains unchanged and the amount of cementitious material and the amount of admixture is reasonable, until the requirements are met. According to the results of the test mixing, the benchmark mix ratio for concrete strength test should be proposed

3. At least three different mix ratios should be used in the concrete strength test. When different mix ratios are used, one of them shall be the benchmark mix ratio determined in paragraph 2 of Article 5 2 2 of these Regulations, and the water-glue ratio of the other two mix ratios shall be increased and decreased respectively compared with the benchmark mix ratio; The water consumption is the same as the benchmark mix, and the volume fraction of the sand can be increased or decreased by 1%, respectively.

4. When making concrete strength test specimens, it should be verified whether the self-compacting performance of the mixture meets the design requirements, and the results should represent the performance index of the concrete mixture with the corresponding mixture.

5 concrete strength test each mix ratio should make at least one group of specimens, standard curing to 28d or the design required age of the pressure test, can also make several groups of specimens at the same time, according to the "early presumed concrete strength test method standard" jgj t 15 early presumed concrete strength, for mix ratio adjustment, but ultimately should meet the standard curing 28d or design specified age of the strength requirements. If there is a durability requirement, the corresponding durability index should also be tested.

6. The benchmark mix ratio should be adjusted according to the results of the trial.

7. For projects with special application conditions, it is advisable to use a certain mix ratio to carry out simulation tests to test whether the designed mix ratio meets the engineering application conditions.

When the rolling method compacts the fill, the rolling direction should be pressed from both sides or all around to the middle, so as to avoid the backfill moving to the surrounding and not ensuring the thickness of the layer. If the construction height of the checkered corner is positive, the corner is filled. The formwork of hydraulic synovial construction is oblique, the upper mouth is tilted inward, and the inclination is aimed at reducing the sliding resistance.

When the pile tip is located in the soft soil layer, the piling should be mainly to control the penetration. Casing cast-in-place pile can be constructed by vibration or hammering method, and the latter adopts the re-punching method or reverse insertion method according to the needs to increase the compactness of concrete, improve the bearing capacity, expand the pile diameter, and if the necking problem is found in time, it can also be eliminated. Cold drawing of steel bars increases their strength.

The faster the speed of the self-falling mixer, the higher the quality of the concrete mixture. After the replacement of the reinforcement, the number of reinforcement rows increases due to the increase of the number of reinforcement rows, and the bearing capacity of the component section decreases, so it is necessary to carry out a strength review. Lime mortar is suitable for masonry in humid environments.

For roofs with a slope of less than 3%, linoleum should be paved perpendicular to the direction of the ridge. When the minimum temperature on the day of construction of brick masonry in winter is lower than a certain data, the mortar of the load-bearing wall is required to be increased by 1 2 levels according to the normal temperature construction to make up for the loss of strength. The total time difference is limited to not affecting the total construction period, which is a type of line time difference.

Flow construction is characterized by the continuity and equilibrium of production. The key lines of a network plan are immutable. The logical relationship in a network diagram refers to the order in which work is done.

When the flow beat has the greatest common divisor, it can be organized into multiple beats and separate flows, and the latter has the shortest flow period. The waterproof outer and inner sticking methods under the membrane refer to the fact that the former is on the outside and the latter is on the inside relative to the bottom plate and side wall of the structure. Deep foundation pit support often adopts underground diaphragm wall, bored pile, steel sheet pile as vertical support, and can be provided with soil anchor or tie rod on this basis to ensure the stability of the support.

Only when the bending strength of the horizontal lifting is qualified, the corbel column can be hung obliquely, otherwise the column must turn over and hang straight binding. Tapered screw anchors are used to anchor steel wire bundles. √

1.The thickness of the mortar joint of the brick masonry is (b).

2.The height of the brick wall should not exceed (d) every day.

3.Among the following formwork is not suitable for the construction of reinforced concrete walls, (b).

4.Among the following reinforcement connection methods, only vertical or diagonal reinforcement connections can be made is (a).

5.In order to prevent temperature cracks, the following measures are wrong (c).

6.Which of the following anchors can be used for both tension and fixed ends (c)7When calculating the blanking length of a single coarse steel bar, which of the following factors does not have to be considered: (c) 8The following description of the rotary lifting column is incorrect (d).

9.The following description of the characteristics of the internode hoisting method of single-storey industrial plant structure is incorrect (a).

10.According to the sub-time, the column can be arranged as a "three-point common arc", and the following are not to belong to these three points (d).

11.In the construction of mud wall protection hole-forming cast-in-place pile, the following are not part of the casing function (d).

This problem has given the design level, and the ground level of corner 1 is the same as the design level, so here is the first zero point.

The construction height is determined according to the height difference between the design height and the ground height.

Then the design slope is calculated according to the design elevation, and then the ground slope is calculated according to the ground mark, and then the zero point position is calculated according to the construction height and marked on the grid line, and all the zero points are connected in turn to form a zero line.

The red line is the design slope, the black line is the ground slope, and the green line is the construction height (construction height = design height - ground height).

The intersection of the red and black lines is the zero point.

First, the construction height must be calculated, and then the proportion is calculated with similar triangles, and then the zero point is determined to draw the zero line.

1、a；2、b；3. B (correct civil engineering); 4、a；5、b；6、a；7、a；8、a；9、a；10、a；11、a；12、d；13、c；14、b；15、a；16、d；17、b；18、c；19、b、20、a；21、b；22、b；23、a；24、b；25、a。

Probably about the same. Time-consuming to see... Why don't you even give a point...

The net height of the bottom frame column is the number after the bottom layer height minus the beam height of 700), then the column base encryption area is 4200 3 1400mm; The enclosure area at the top of the column is 4200 6 700mm;

The net height of the rest of the columns is also the number of each layer height minus the beam height 700), then the column foot, column top stirrup encryption area: 3600 6 600mm, but because the cross-section height of the column is 650, it should be taken as 650mm.

The first level is seismic, and the corner posts should be filled with full-height stirrups.

The stirrup encryption area in the frame column should be within the maximum value range of the two ends of the column in the height equal to the size of the long side of the rectangular section or the diameter of the garden column section and the net height of the column in mm. Please be sure.