CN214993997U

CN214993997U - A structure for deep basal pit elevartor shaft precipitation construction

Info

Publication number: CN214993997U
Application number: CN202121557847.1U
Authority: CN
Inventors: 高永丰; 李志强; 张乔景; 张淑珍; 白瑞芳
Original assignee: China Shanxi Sijian Group Co Ltd
Current assignee: China Shanxi Sijian Group Co Ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-12-03
Anticipated expiration: 2031-07-09

Abstract

The utility model provides a structure for deep basal pit elevartor shaft precipitation construction, belongs to precipitation engineering construction technical field, can solve deep basal pit elevartor shaft depth range and be the silty clay layer, and the permeability is poor, and water-retaining property is good, and the precipitation degree of difficulty is big, and the unable problem that forms the slope of putting on the limit of digging, including the sump pit, the bottom of sump pit is equipped with the water filtering layer, and the lateral wall of sump pit is equipped with the strutting arrangement who plays interim anti wall and strut, strutting arrangement includes a plurality of steel pipes, and one side of the relative sump pit lateral wall of steel pipe is equipped with the template in proper order and plays the sand bag of filling effect, and the centre of sump pit is equipped with the precipitation well, is equipped with the immersible pump in the precipitation well, and the immersible pump is connected with the drain pipe, and the one end of drain pipe stretches out the sump pit outside. The utility model discloses a set up the strutting arrangement that interim anti wall was strutted at the sump pit, can prevent to meet and gush the sand volume big, the pithead can't stand, all excavation position toe quicksand unstability, and upper portion is closely along with collapsing, because of gushing the sand volume big, unlimited problem of collapsing.

Description

A structure for deep basal pit elevartor shaft precipitation construction

Technical Field

The utility model belongs to the technical field of precipitation engineering construction, concretely relates to a structure for deep basal pit elevartor shaft precipitation construction.

Background

The depth range of the elevator shaft is a silty clay layer (containing a silt interlayer), the permeability is poor, the water-retaining property is good, the precipitation difficulty is high, the basement is the silt layer, the underground water level cannot be guaranteed below the bottom of the elevator pit, silt and water form flowing sand, and the pit edge cannot form a slope. By adopting the traditional Larsen steel sheet pile and tubular well water lowering elevator well water lowering measures, the water locking position of the Larsen steel sheet pile is not well occluded, so that water leakage is easy to occur at the joint. The lateral wall appears the infiltration and can't be waterproof and hardly satisfies foundation ditch elevartor shaft precipitation requirement. And the pile head in the foundation pit is not beneficial to the operation of the pile machine, and the cost is too high when the condition limitation cannot be removed.

Disclosure of Invention

The utility model discloses be the silty clay layer to deep basal pit elevartor shaft degree of depth scope, the permeability is poor, and water-retaining property is good, and the precipitation degree of difficulty is big, and the unable problem of forming of putting the slope in hole limit provides a structure that is used for deep basal pit elevartor shaft precipitation to be under construction.

The utility model adopts the following technical scheme:

the utility model provides a structure for deep basal pit elevartor shaft precipitation construction, includes the sump pit, and the bottom of sump pit is equipped with the water filtration layer, and the lateral wall of sump pit is equipped with the strutting arrangement who temporarily resists the wall and strut, strutting arrangement includes a plurality of steel pipes, and one side of the relative sump pit lateral wall of steel pipe is equipped with the template in proper order and plays the sand bag of filling effect, and the centre of sump pit is equipped with the precipitation well, is equipped with the immersible pump in the precipitation well, and the immersible pump is connected with the drain pipe, and the sump pit outside is stretched out to the one end of drain pipe.

Further, the thickness of the water filtration layer was 30 cm.

Further, the steel pipes are arranged at equal intervals, and the interval is 30 cm.

Further, the bottom of the steel pipe is located at the position of 1m at the bottom of the water collecting pit.

Further, the bottom of the dewatering well is positioned below 1m of the bottom of the sump.

Furthermore, the top of the steel pipe is provided with a transverse steel pipe which is connected with the continuous rib of the cast-in-place pile at the edge of the water collecting pit, so that inward overturning can be prevented.

The utility model has the advantages as follows:

the utility model discloses a set up the strutting arrangement that interim anti wall was strutted at the sump pit, can prevent to meet and gush the sand volume big, the pit wall can't stand, all excavation position slope foot quicksand unstability, upper portion is closely along with collapsing, because of gushing the sand volume big, the unlimited problem of collapsing, precipitation well passes through the immersible pump drainage, precipitation is effectual, the cycle is short.

Drawings

Fig. 1 is a schematic structural view of the present invention;

wherein: 1-a water collecting pit; 2-water filtration layer; 3-a steel pipe; 4-template; 5-sand bag; 6-dewatering well; 7-a submersible pump; 8-a drain pipe.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in the figure, a structure for deep basal pit elevartor shaft precipitation construction, its characterized in that: including sump pit 1, the bottom of sump pit 1 is equipped with water filtration layer 2, and the lateral wall of sump pit 1 is equipped with the supporting device that temporary anti wall was strutted, supporting device includes a plurality of steel pipes 3, and one side of the relative sump pit 1 lateral wall of steel pipe 3 is equipped with template 4 in proper order and plays the sand bag 5 of filling effect, and the centre of sump pit 1 is equipped with precipitation well 6, is equipped with immersible pump 7 in the precipitation well 6, and immersible pump 7 is connected with drain pipe 8, and the one end of drain pipe 8 stretches out the sump pit 1 outside.

The utility model relates to deep basal pit elevartor shaft sump pit struts precipitation construction adopts steel pipe + template + sand bag to strut as interim anti wall.

The utility model discloses a use method as follows:

the whole water collecting pit needs to be excavated step by step to see the bottom. The permeability of the soil body between the dewatering wells of the foundation pit is poor, and the depths of the adjacent water collecting pits of the elevator shaft are similar, so that the adjacent water collecting pits are dug to form an oversized ultra-deep water collecting pit, and elevator pits with the sizes of 9m and 13.6m are connected with the oversized ultra-deep water collecting pit for excavation.

And (5) excavating to 1.5m in the first step without any obstacle, and breaking the pile.

During the excavation of second step, the volume of gushing sand is big, and the pithead can't stand, and all excavation position slope foot quicksand unstability, upper portion are closely followed and are collapsed, and is big because of the volume of gushing sand, unlimited collapse, consequently adopt steel pipe + template + sand bag to strut as interim anti-wall: the position of the hole caused by sand gushing is arranged and driven into the ground by 1m deep by using the steel pipes with the distance of 30cm, the back of the steel pipes is spliced with a template, the template is inserted into the pit bottom soil as much as possible, sand bags are filled in the back of the template, and the top of the vertical steel pipes is fixed on continuous ribs of the cast-in-place pile at the pit edge by adding the transverse steel pipes, so that inward overturning is prevented.

And (3) after the bottom of the water collecting well is found, the water collecting well is immediately reprocessed to ensure that the depth of the water collecting well is below 1.0 m of the base, a 3KW sewage pump is added for discharging the water, a crushed stone water filtering layer with the thickness of 30cm is arranged below the base, and the seepage water is guided into the water filtering layer and is discharged from the water collecting well. And residual seepage water is prevented from being stagnated on the cushion layer, and waterproof construction conditions are met.

S1, pressing the excavator into the embedded steel pipe for 6 m; obliquely inserting the embedded pipes around the elevator shaft at an interval of 30cm, inserting the template into the inner side of the embedded pipes, and fully and compactly piling the sand bags on the outer side of the embedded pipes; digging soil and draining water with a submersible pump;

s2, arranging a crushed stone water filtering layer with the thickness of 30 cm;

s3, arranging a dewatering well at the center of the sump and the elevator shaft;

s4, installing a submersible pump in the precipitation well;

s5, before the cushion layer is poured, a layer of plastic film is paved above the foundation layer of the water collecting pit; then pouring a cushion layer, paving a waterproof layer and a waterproof protective layer, binding steel bars and installing and constructing a template; pouring concrete on the raft foundation.

Claims

1. The utility model provides a structure for deep basal pit elevartor shaft precipitation construction which characterized in that: including sump pit (1), the bottom of sump pit (1) is equipped with drainage layer (2), and the lateral wall of sump pit (1) is equipped with the supporting device that temporary anti wall was strutted, supporting device includes a plurality of steel pipes (3), and one side of the relative sump pit (1) lateral wall of steel pipe (3) is equipped with template (4) in proper order and plays sand bag (5) of filling effect, and the centre of sump pit (1) is equipped with precipitation well (6), is equipped with immersible pump (7) in precipitation well (6), and immersible pump (7) are connected with drain pipe (8), and the one end of drain pipe (8) is stretched out sump pit (1) outside.

2. The structure for precipitation construction of deep foundation pits elevator shaft according to claim 1, characterized in that: the thickness of the water filtering layer (2) is 30 cm.

3. The structure for precipitation construction of deep foundation pits elevator shaft according to claim 1, characterized in that: the steel pipes (3) are arranged at equal intervals, and the interval is 30 cm.

4. The structure for precipitation construction of deep foundation pits elevator shaft according to claim 1, characterized in that: the bottom of the steel pipe (3) is positioned at the position of 1m at the bottom of the water collecting pit (1).

5. The structure for precipitation construction of deep foundation pits elevator shaft according to claim 1, characterized in that: the bottom of the dewatering well (6) is positioned below 1m of the bottom of the sump (1).

6. The structure for precipitation construction of deep foundation pits elevator shaft according to claim 1, characterized in that: the top of the steel pipe (3) is provided with a transverse steel pipe which is connected with the continuous rib of the cast-in-place pile at the edge of the water collecting pit (1).