阅读说明：本技术 一种土木工程地基止水方法 (Civil engineering foundation water stopping method ) 是由 崔正旭 于 2020-07-01 设计创作，主要内容包括：一种土木工程地基止水方法,包括以下步骤：S1：清除河道淤泥和杂物；S2：利用成孔机械在地层中打孔,形成桩孔；S3：向桩孔内灌入止水填充料,并向下撞击、挤压止水填充料,止水填充料挤入地层的空隙中；S4：将定位柱竖直插入止水填充料内,定位柱上端伸出桩孔上方；S5：在地层表面设置混凝土浆层,混凝土浆层上设置黏土层,黏土层上设置耐压颗粒层；S6：耐压颗粒层上设置防渗透材料层,防渗透材料层上设置防水毯层；防水毯层上设置石屑层；石屑层上铺设石板层。本发明具有很好的防渗透作用,适合大多数土质,定位柱能够深入地层中,形成稳固结构,从而对混凝土浆层、黏土层和耐压颗粒层形成很好的稳固结构。(A civil engineering foundation water stopping method comprises the following steps: s1: removing sludge and impurities in the river channel; s2: punching a hole in the stratum by using a hole forming machine to form a pile hole; s3: pouring water-stopping filler into the pile hole, impacting and extruding the water-stopping filler downwards, and extruding the water-stopping filler into gaps of the stratum; s4: vertically inserting a positioning column into the water stopping filler, wherein the upper end of the positioning column extends out of the upper part of the pile hole; s5: arranging a concrete slurry layer on the surface of the ground, arranging a clay layer on the concrete slurry layer, and arranging a pressure-resistant granular layer on the clay layer; s6: an anti-seepage material layer is arranged on the pressure-resistant particle layer, and a waterproof blanket layer is arranged on the anti-seepage material layer; a stone chip layer is arranged on the waterproof blanket layer; and a stone slab layer is laid on the stone chip layer. The anti-seepage positioning column has a good anti-seepage effect, is suitable for most of soil, and can penetrate into the stratum to form a stable structure, so that a good stable structure is formed for a concrete slurry layer, a clay layer and a pressure-resistant particle layer.)

1. A civil engineering foundation water stopping method is characterized by comprising the following steps:

s1: removing sludge and impurities in the river channel;

s2: punching a hole in the stratum by using a hole-forming machine to form a pile hole (3);

s3: pouring water-stopping filler (4) into the pile hole, impacting and extruding the water-stopping filler (4) downwards, and extruding the water-stopping filler (4) into gaps of the stratum;

s4: vertically inserting a positioning column (1) into the water stopping filler (4), wherein the upper end of the positioning column (1) extends out of the upper part of the pile hole (3);

s5: arranging a concrete slurry layer (11) on the surface of the ground, arranging a clay layer (12) on the concrete slurry layer (11), and arranging a pressure-resistant granular layer (13) on the clay layer (12);

the upper end of the positioning column (1) is inserted into the concrete slurry layer (11), the clay layer (12) and the pressure-resistant granular layer (13), and the pressure-resistant granular layer (13) covers the upper end of the positioning column (1);

s6: an anti-seepage material layer (14) is arranged on the pressure-resistant particle layer (13), and a waterproof blanket layer (15) is arranged on the anti-seepage material layer (14); a stone chip layer (16) is arranged on the waterproof blanket layer (15); a stone slab layer (17) is laid on the stone chip layer (16).

2. The civil engineering foundation waterstop method as claimed in claim 1, wherein the pile holes (3) are uniformly distributed in a square matrix.

3. Civil engineering foundation waterstop method according to claim 1, characterized in that the positioning column (1) is provided with a plurality of barbs (2) inclined upwards.

4. The civil engineering foundation water stopping method as claimed in claim 3, wherein the plurality of barbs (2) are evenly distributed along the peripheral annular array of the positioning column (1), and the plurality of barbs (2) are evenly distributed along the vertical direction at equal intervals.

5. Civil engineering foundation waterstop method according to claim 1, characterised in that the diameter of the pile hole (3) is 30-50 cm; the diameter of the positioning column (1) is 15-25 cm; the positioning column (1) is a stainless steel reinforced column.

6. Civil engineering foundation waterstop method according to claim 1, characterized in that the thickness of the concrete paste layer (11) is not less than 10 cm.

7. Civil engineering foundation waterstop method according to claim 1, characterized in that in S2 pile hole (2) is drilled or driven hole.

8. The civil engineering foundation sealing method of claim 1, characterized in that the sealing filler (4) is one or more of cement mortar, concrete mortar, cement clay mixture, clay or construction glue.

Technical Field

The invention relates to the technical field of foundation water stopping, in particular to a civil engineering foundation water stopping method.

Background

The current foundation pit side wall water stopping method in civil engineering mainly comprises a deep stirring pile method, a high-pressure injection method, a grouting method, an underground continuous wall method, a steel sheet pile method and the like.

The deep mixing pile method is not suitable for gravel layers, gravel layers and pebble layers. When the flow velocity of underground water flow is larger, the pile forming quality is poor, and the water stopping effect is poor.

The high-pressure injection method is only suitable for soft soil and sand layers, is not suitable for gravel layers, gravel layers and pebble layers, and is not suitable when larger stones exist in the filled soil. Similarly, when the flow velocity of underground water flow is larger, the pile forming quality is poor, and the water stopping effect is poor.

The grouting method is only suitable for sand layers, but not for gravel layers, gravel layers and pebble layers. The method has the biggest defects that the flow direction of the slurry cannot be ensured, the filling place is not filled, and the place which does not need to be filled is filled, so that the water stopping effect cannot be ensured, and in addition, when the flow rate of underground water flow is large, the water stopping quality is poor.

The underground continuous wall method is to construct a continuous closed reinforced concrete wall body underground through a special machine, thereby achieving the water stopping effect. The method has good water stopping effect, is suitable for various stratums, but has high manufacturing cost, cannot be accepted by general construction units, and is only used by combining some important projects with support.

The steel sheet pile method is to drive the steel sheet pile into the ground layer through special machinery to form a continuous closed steel sheet pile wall, thereby achieving the water stopping effect. The method has a general water stopping effect, is not suitable for compact sand soil layers and gravel layers, and is particularly not suitable for gravel layers and pebble layers.

Disclosure of Invention

Objects of the invention

In order to solve the technical problems in the background art, the invention provides the water stopping method for the civil engineering foundation, which has a good anti-seepage effect and is suitable for most soil qualities, and the positioning column can penetrate into the stratum to form a stable structure, so that a good stable structure is formed for a concrete slurry layer, a clay layer and a pressure-resistant particle layer.

(II) technical scheme

In order to solve the problems, the invention provides a civil engineering foundation water stopping method, which comprises the following steps:

s1: removing sludge and impurities in the river channel;

s2: punching a hole in the stratum by using a hole forming machine to form a pile hole;

s3: pouring water-stopping filler into the pile hole, impacting and extruding the water-stopping filler downwards, and extruding the water-stopping filler into gaps of the stratum;

s4: vertically inserting a positioning column into the water stopping filler, wherein the upper end of the positioning column extends out of the upper part of the pile hole;

s5: arranging a concrete slurry layer on the surface of the ground, arranging a clay layer on the concrete slurry layer, and arranging a pressure-resistant granular layer on the clay layer;

the upper end of the positioning column is inserted into the concrete slurry layer, the clay layer and the pressure-resistant particle layer, and the pressure-resistant particle layer covers the upper end of the positioning column;

s6: an anti-seepage material layer is arranged on the pressure-resistant particle layer, and a waterproof blanket layer is arranged on the anti-seepage material layer; a stone chip layer is arranged on the waterproof blanket layer; and a stone slab layer is laid on the stone chip layer.

Preferably, the pile holes are uniformly distributed in a square matrix.

Preferably, a plurality of barbs inclined upwards are arranged on the positioning column.

Preferably, a plurality of barbs set up along the week end annular array equipartition of reference column, and a plurality of barbs set up along vertical direction equidistant equipartition.

Preferably, the diameter of the pile hole is 30-50 cm; the diameter of the positioning column is 15-25 cm; the positioning column is a stainless steel reinforced column.

Preferably, the thickness of the concrete slurry layer is not less than 10 cm.

Preferably, in S2, the pile hole is a drill-in hole or a drive-in hole.

Preferably, the water-stopping filler is one or more of cement mortar, concrete mortar, cement clay mixture, cohesive soil or construction glue.

The positioning column is suitable for most of soil, and can penetrate into the stratum to form a stable structure; wherein, the reference column lower extreme inserts downthehole, and the reference column upper end inserts in concrete thick liquid layer, clay layer and the withstand voltage granule layer to form fine stable structure to concrete thick liquid layer, clay layer and withstand voltage granule layer.

In the invention, a plurality of water stopping columns, a concrete slurry layer and an clay layer form a water stopping area so as to play a role in preventing groundwater from permeating upwards; the water-stopping filling material has good stabilizing effect; meanwhile, the pressure-resistant particle layer can buffer the pressure between materials, and the anti-seepage material layer and the matching have good water-blocking anti-seepage effect.

Drawings

Fig. 1 is a schematic structural view of the water stopping method for civil engineering foundation according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1, the method for stopping water in a civil engineering foundation provided by the invention comprises the following steps:

s1: removing sludge and impurities in the river channel;

s2: punching a hole in the stratum by using a hole-forming machine to form a pile hole 3;

s3: pouring water-stopping filler 4 into the pile hole, impacting and extruding the water-stopping filler 4 downwards, and extruding the water-stopping filler 4 into gaps of the stratum;

s4: vertically inserting a positioning column 1 into the water stopping filler 4, wherein the upper end of the positioning column 1 extends out of the upper part of the pile hole 3;

s5: arranging a concrete slurry layer 11 on the surface of the ground, arranging an clay layer 12 on the concrete slurry layer 11, and arranging a pressure-resistant particle layer 13 on the clay layer 12;

the upper end of the positioning column 1 is inserted into the concrete slurry layer 11, the clay layer 12 and the pressure-resistant granular layer 13, and the pressure-resistant granular layer 13 covers the upper end of the positioning column 1;

s6: an impermeable material layer 14 is arranged on the pressure-resistant particle layer 13, and a waterproof blanket layer 15 is arranged on the impermeable material layer 14; a stone chip layer 16 is arranged on the waterproof blanket layer 15; and a stone slab layer 17 is laid on the stone chip layer 16.

The positioning column 1 is suitable for most of soil, and can penetrate into the stratum to form a stable structure; the lower end of the positioning column 1 is inserted into the pile hole 3, and the upper end of the positioning column 1 is inserted into the concrete slurry layer 11, the clay layer 12 and the pressure-resistant granular layer 13, so that a good stable structure is formed for the concrete slurry layer 11, the clay layer 12 and the pressure-resistant granular layer 13;

in the invention, a plurality of water stopping columns, the concrete grout layer 11 and the clay layer 12 form a water stopping area so as to play a role in preventing groundwater from permeating upwards; the water stopping filler 4 has good stabilizing effect; meanwhile, the pressure-resistant particle layer 13 can buffer the pressure between materials, and the impermeable material layer 14 has a good water-blocking and impermeable effect in cooperation.

In the invention, in S3, the water stopping filler 4 is impacted and extruded downwards, the heavy punch is used to impact the water stopping filler 4, and the water stopping filler 4 is pressed into the ground by static force, so that a water stopping column is formed around the pile hole 2 to meet the water stopping requirement.

In an optional embodiment, a plurality of pile holes 3 are uniformly distributed in a square matrix, so that the arrangement of the positioning columns 1 and the water-stop filling material 4 is more uniform, and the comprehensive anti-seepage performance is improved.

In an alternative embodiment, the positioning column 1 is provided with a plurality of barbs 2 inclined upwards.

In an optional embodiment, a plurality of barbs 2 are arranged along the periphery of the positioning column 1 in an annular array and are uniformly distributed, and the plurality of barbs 2 are uniformly distributed in a vertical direction at equal intervals.

It should be noted that, be equipped with a plurality of tilt up's barb 2 on the reference column 1, barb 2 is by better fixed in stagnant water stopping filler 4 to realize stagnant water stopping filler 4 to the better fixed of reference column 1, place reference column 1 and appear rocking, thereby make the equipment fixing more firm.

In an alternative embodiment, the diameter of the stake hole 3 is 30-50 cm; the diameter of the positioning column 1 is 15-25 cm; the positioning column 1 is a stainless steel reinforced column; the installation of equipment is convenient for, and the stability of equipment is guaranteed. The positioning column 1 is a stainless steel reinforced column, so that the service life of the equipment is prolonged.

In an alternative embodiment, the thickness of the concrete grout layer 11 is not less than 10cm, increasing the firmness of the whole device.

In an alternative embodiment, pile hole 2 is a drill or a drive-in hole at S2.

In an alternative embodiment, the water stop filler 4 is one or more of cement mortar, concrete mortar, cement clay mixture, clay, or construction cement.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.