CN211690296U - Underground continuous wall of socket joint formula steel lattice framework - Google Patents

Abstract

The utility model relates to an underground continuous wall construction technical field discloses an underground continuous wall of socket joint formula steel lattice skeleton. The utility model comprises a framework structure and concrete, wherein the framework structure is formed by arranging first lattice columns and second lattice columns in a staggered way at intervals, and the first lattice columns and the second lattice columns are connected in a socket joint way; the first lattice column comprises a first end upright rod positioned at the end corner of the four sides of the rectangle and a rectangular frame belt arranged around the first end upright rod; the second lattice column comprises second end vertical rods positioned at four corners and a surrounding frame structure surrounding the second end vertical rods, the second end vertical rods are composed of a pair of short steel strips and a pair of long steel strips, the two end plate surfaces of the long steel strips extend outwards in a horizontal mode after being fixed with the outer side walls of the second end vertical rods on two sides, insertion grooves are formed by the long steel strips opposite to each other, and the first lattice column is inserted into the insertion grooves in a matched mode. The utility model discloses the equipment of skeleton piecemeal, the location is swift accurate, and the hoist and mount degree of difficulty is little, and the efficiency of construction is high.

Description

Underground continuous wall of socket joint formula steel lattice framework

Technical Field

The utility model relates to an underground continuous wall construction technical field especially relates to an underground continuous wall of socket joint formula steel lattice skeleton.

Background

With the rapid development of global economy, the departure of the urbanization policy of China, a large number of people are rushed into cities, cities in various regions are rapidly expanded, the vitality of urban circles is large, people flow traffic is more and more intensive, the requirements of high-rhythm life on the convenience and comfort of traffic are more and more high, rail traffic characterized by 'rapidness, punctuality, comfort, safety, environmental protection and large transport capacity' is particularly important, rail traffic network planning of various cities in the country is successively released, rail traffic construction in various regions is rapidly developed, subways are built under cities built in high buildings, the safety risk of deep foundation pits is more and more large, and design houses in various regions also provide various foundation pit supporting forms aiming at different stratums and surrounding environments.

However, in some special site environments, different construction difficulties and requirements often exist, for example, when some sites are narrow and support is near a deep and large foundation pit beside an important building, a ground-to-wall enclosure structure is adopted, but the sites are narrow, the requirement on a support system is high, the construction period is short, the lifting operation surface is small, the traditional reinforcement cage does not have an integral lifting space, the construction period of a single wall body of the reinforcement cage partition block construction is long, holes are prone to collapse, the cage is clamped, and the support system is weakened during the reinforcement cage block construction, so that the enclosure requirements are not met; still some diaphragm walls use steel pipe piles as internal supporting structures.

SUMMERY OF THE UTILITY MODEL

The utility model provides a skeleton piecemeal equipment, the location is swift accurate, and the hoist and mount degree of difficulty is little, the underground continuous wall of the socket joint formula steel lattice skeleton that the efficiency of construction is high.

The technical problem to be solved is that: the traditional underground diaphragm wall inner framework is a steel reinforcement cage, the construction limitation is large, the integral hoisting difficulty is large, the block hoisting positioning connection difficulty is large, and the bearing capacity is low.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model discloses underground continuous wall of socket joint formula steel lattice framework, including skeleton texture and concrete, skeleton texture is formed by first lattice column and the crisscross arrangement of second lattice column interval, and socket joint is connected between first lattice column and the second lattice column;

the cross section of the first lattice column is rectangular and comprises a first end upright rod positioned at the end corner of the four sides of the rectangle and a rectangular frame belt arranged around the first end upright rod;

the rectangle is personally submitted in the transversal cross section of second lattice column, including the second end pole setting that is located four edges department and enclose the frame structure of establishing around the second end pole setting, enclose the rectangle frame area one-to-one setting on frame structure and the first lattice column, constitute by a pair of short steel band and a pair of long steel band, long steel band sets up the long limit one side of cross section at the second lattice column, both ends face outwards extends with the fixed back level of the lateral wall of the second end pole setting of both sides, surpass the surface setting of short steel band, form the inserting groove between the relative long steel band, first lattice column cooperation is inserted and is established in the inserting groove.

The utility model discloses socket joint formula steel lattice framework's underground continuous wall, it is further, the cross section length direction of first lattice post and second lattice post all sets up along underground continuous wall's extending direction.

The utility model discloses underground continuous wall of socket joint formula steel lattice framework, it is further, the first end pole setting is the angle steel, and relative lock sets up, and the length direction interval of first end pole setting is followed in the rectangle frame area is arranged.

The utility model discloses the underground continuous wall of socket joint formula steel lattice framework, further, the distance between upper and lower adjacent rectangle frame area is not more than 500mm, and the rectangle frame area is enclosed for the width 180 plus steel plate strip area of 210mm and closes and form; the steel plate strip is attached to the outer side faces of the first end vertical rods on the two sides and is welded and fixed.

The utility model discloses socket joint formula steel lattice framework's underground continuous wall, it is further, the middle part of first lattice column and second lattice column is provided with the support pole setting respectively, sets up relatively at the rectangle frame area parallel with the wall or encloses the frame structurally.

The utility model discloses socket joint formula steel lattice framework's underground continuous wall, it is further, support the angle steel that the pole setting is vertical setting, the axis coplane setting of a side limb board and first lattice column or second lattice column.

The utility model discloses underground continuous wall of socket joint formula steel lattice framework, it is further, adjacent from top to bottom connect through angle connector between the first lattice column, the outside in the first end pole setting is established to the angle connector ladle, with the laminating setting of first end pole setting to it is fixed through connecting bolt, and connecting bolt passes through nut locking after angle connector and the first end pole setting in proper order.

The utility model discloses socket joint formula steel lattice framework's underground continuous wall, it is further, be located the bottom the pole setting bottom of first lattice column and second lattice column is provided with the closing end board.

The utility model discloses underground continuous wall of socket joint formula steel lattice skeleton compares with prior art, has following beneficial effect:

the utility model discloses with the construction of the braced skeleton piecemeal in the diaphragm wall underground, the mill is prefabricated, and the scene is pieced together and is inserted, and the latticed post volume after the piecemeal is less, and the mill of being convenient for is prefabricated to be processed in batches, also is convenient for transport and storage, can adopt the small-tonnage crane handling simultaneously, has reduced the handling expense of ground diaphragm wall construction, and the restriction is great in some construction sites, large-scale hoisting equipment can't advance the place of staying, also can use, and it is nimble convenient to use, and application scope is extensive.

The utility model discloses simple structure, engineering cost is low, and the socket joint is connected and is formed the support wholly between first lattice column and the second lattice column, and the convenient high efficiency of construction has cancelled adjacent two ground even the I-steel of wall and has connected, has not only reduced the work progress, has reduced construction cost moreover, has improved the efficiency of construction.

The utility model uses the lattice steel structure to replace the steel reinforcement cage, the horizontally connected rectangular frame belts or the surrounding frame structures are arranged at intervals, the inside and outside connectivity of the framework structure is better, and the pouring and the compaction of concrete are more convenient; the wing plates are mutually matched, so that the construction period of the spliced single-wall body is shortened, the site of hole collapse and hole shrinkage can be effectively reduced, the section steel is relatively regular compared with the traditional steel reinforcement cage, the disturbance of hoisting in a narrow space to a slotted hole can be effectively avoided, and the construction is convenient; the whole even rectangle that is of skeleton texture distributes, and the protective layer thickness of both sides is even unanimous, and the bearing capacity of ground even wall is more even, can not appear the position weak relatively, and the wholeness is better, can effectively satisfy the requirement of strutting intensity of big foundation ditch deeply.

The utility model discloses can be according to the requirement of construction design, nimble horizontal concatenation and vertical concatenation of selecting are used, connect simple easy operation, and not only the efficiency of construction is high, and construction quality guarantee nature is good, and it is more nimble convenient to use moreover, and application scope is extensive.

The underground diaphragm wall of the socket steel lattice framework of the present invention will be further explained with reference to the attached drawings.

Drawings

FIG. 1 is a schematic structural view of an underground diaphragm wall of the socket steel lattice framework of the present invention;

FIG. 2 is a schematic cross-sectional view of an underground diaphragm wall;

FIG. 3 is a schematic structural view of a first lattice column;

FIG. 4 is a schematic structural view of a second lattice column;

FIG. 5 is a schematic view of a connecting node of upper and lower adjacent first lattice columns;

fig. 6 is a schematic structural view of a section a-a in fig. 5.

Reference numerals:

1-a first lattice column; 11-a first end upright rod; 12-rectangular frame strips; 2-a second lattice column; 21-a second end upright; 22-a surrounding frame structure; 221-short steel strips; 222-long steel strip; 3-concrete; 4-supporting the vertical rod; 5-inserting grooves; 6-connecting angle steel; 7-connecting bolt.

Detailed Description

As shown in figures 1 to 2, the utility model discloses socket joint formula steel lattice framework's underground continuous wall includes skeleton texture and concrete 3, and skeleton texture is formed by crisscross arranging in first lattice column 1 and the 2 intervals of second lattice column, and socket joint is connected between first lattice column 1 and the second lattice column 2.

As shown in fig. 3, the cross section of the first lattice column 1 is rectangular, the length of the cross section is not less than 900mm, the length is arranged along the extending direction of the underground continuous wall, and the first lattice column comprises first end upright posts 11 positioned at the end corners of the four sides of the rectangle and rectangular frame belts 12 arranged around the first end upright posts 11, the first end upright posts 11 are angle steel and are oppositely buckled, the rectangular frame belts 12 are arranged at intervals along the length direction of the first end upright posts 11, the distance between the upper and lower adjacent rectangular frame belts 12 is not more than 500mm, the rectangular frame belts 12 are steel plate belts with the width of 180 plus 210mm, and the steel plate belts are jointed and welded and fixed with the outer side faces of the first end upright posts 11 at the two sides; the middle part of the first lattice column 1 is also provided with a supporting upright rod 4, the supporting upright rod 4 is angle steel with vertical arrangement, the angle steel is arranged on a steel plate strip parallel to the wall surface, the inner surface of a lateral surface laminating rectangular frame strip 12 of a side limb plate is arranged and welded and fixed, and the other side limb plate is arranged in the same plane with the central axis of the first lattice column 1.

The first lattice columns 1 can be connected up and down for use according to construction requirements, as shown in fig. 5 and 6, the first lattice columns 1 which are adjacent up and down are connected through connecting angle steel 6, the length of the connecting angle steel 6 is not less than 600mm, the side length is not less than 200mm, the size of the used angle steel is consistent with that of the first end upright 11, and the used angle steel is wrapped on the outer side of the first end upright 11, is attached to the first end upright 11 and is fixedly connected with the first end upright 11; can weld fixedly, also can use connecting bolt 7 fixed, set up a set of connecting bolt 7 on the two limbs board of angle connector 6 respectively, connecting bolt 7 passes connecting angle 6 and first end pole setting 11 back in proper order and passes through nut locking.

As shown in fig. 4, the second lattice column 2 has a rectangular cross section, the length of the cross section is not greater than 1500mm, the second lattice column 2 is arranged along the extension direction of the underground continuous wall, and comprises second end uprights 21 located at the end corners of the four sides and enclosure frame structures 22 arranged around the second end uprights 21, the second end uprights 21 are angle steels and are oppositely buckled, the enclosure frame structures 22 are arranged at intervals along the length direction of the second end uprights 21 and are in one-to-one correspondence with the rectangular frame belts 12 on the first lattice column 1, the enclosure frame structures 22 are composed of a pair of short steel belts 221 and a pair of long steel belts 222, the short steel belts 221 are arranged on one side of the short side of the cross section of the second lattice column 2, the plate surfaces at the two ends are attached to and welded and fixed with the outer side walls of the second end uprights 21 at the two sides, the long steel belts 222 are arranged on one side of the long side of the cross section of the second lattice column 2, the plate surfaces at the, the first latticed column 1 is arranged to exceed the outer surface of the short steel strip 221, an inserting groove 5 is formed between the opposite long steel strips 222, and the first latticed column 1 is inserted into the inserting groove 5 in a matched mode.

The middle part of the second lattice column 2 can also be provided with a supporting upright rod 4, the supporting upright rod 4 is arranged on the short steel belt 221 relatively, the outer side surface of one side limb plate is attached to the inner surface of the short steel belt 221 and is welded and fixed, and the other side limb plate is arranged in the same plane with the central axis of the second lattice column 2.

The vertical connection between the second lattice column 2 adjacent from top to bottom, the connection mode is the same as that of the first lattice column 1, and the connection angle steel 6 is fixedly connected, can be welded and fixed, and can also be connected and fixed through bolts.

The pole setting bottom that is located first lattice column 1 and second lattice column 2 of bottom is provided with the end plate, and the end plate is the rectangle steel sheet that thickness is not less than 6mm, avoids framework to take place the skew before the concatenation is accomplished, reinforcing framework's stability.

When the underground diaphragm wall encounters a cross foundation pit, a cross pipeline in the foundation pit is clamped between the upper rectangular frame belt 12 and the lower rectangular frame belt 22 which are adjacent to each other or the surrounding frame structure 22, so that the framework structure is not modified on site, a protective frame is provided for the cross pipeline, and the convenience and the safety of construction are greatly improved.

The utility model discloses construction method of underground continuous wall of socket joint formula steel lattice skeleton, including following step:

step one, prefabricating a component: prefabricating a first lattice column 1 and a second lattice column 2 in a factory according to construction design requirements;

the breadth of the first lattice column 1 and the second lattice column 2 is controlled within the range of 900-1500mm, and the lattice columns are segmented according to the depth of the underground continuous wall, wherein the length of the lattice columns does not exceed 12m, so that the transportation and the hoisting are facilitated.

Step two, constructing a guide wall;

the guide wall is a reference for controlling various indexes of the underground continuous wall, and plays a role in supporting a notch soil body, bearing ground load and stabilizing the slurry level; the construction of the guide wall is carried out according to the following steps:

2.1, accurately positioning the position of the underground continuous wall and the position of the guide wall by using a total station;

2.2, excavating earthwork, namely excavating by using a small excavator, manually matching with bottom cleaning, and tamping a substrate;

2.3, paving a cement mortar layer on the substrate, wherein the thickness of the cement mortar layer is not less than 7 cm;

and 2.4, erecting a template, pouring concrete 3 and vibrating by using an insertion vibrator.

The top of the guide wall is not less than 10cm higher than the ground so as to prevent ground water and polluted mud from flowing into the groove; the top surface of the guide wall is made to be horizontal, the influence of the ground gradient is considered, and a 10cm step is made at a proper position; after the template is removed, an upper square timber and a lower square timber with the length of 10 multiplied by 10cm are additionally arranged every 1 m along the longitudinal direction of the template to serve as inner supports, two guide walls are supported, and any heavy machinery and transportation equipment are forbidden to pass by the guide walls before the concrete of the guide walls reaches the designed strength; the construction joint of the guide wall is staggered with the joint of the underground wall.

Step three, grooving construction;

the mud mainly plays a role of protecting walls in the process of digging grooves on the underground continuous wall and is usually stored in a mud pit which is formed by enclosing a reinforced concrete 3 bottom plate and a masonry brick wall, the mud is recycled, and the mud tank truck is used for carrying out outward transportation treatment on the waste mud. In the process of digging the groove, slurry is injected into the digging groove section from the slurry tank, and is injected while digging, and the distance between the slurry liquid level and the guide wall surface is kept about 0.3m and is higher than the underground water level by more than 0.5 m. Pumping reverse circulation is adopted in the rock entering and groove cleaning processes, slurry is pumped into the groove from a circulation tank, the slurry in the groove is pumped into a sedimentation tank, and the slurry returns to the circulation tank after physical treatment. In the pouring process of the concrete 3, the mud on the upper part returns to the sedimentation tank or is poured into the next section of underground diaphragm wall excavation groove, and the mud in the position 4m above the top surface of the concrete 3 is discharged to a waste mud tank and is not used for waste.

In the grooving process, the perpendicularity and the plane position of the grab bucket are strictly controlled, particularly in the grooving stage, a monitoring system is carefully observed, and when the deviation in any direction exceeds an allowable value, deviation correction is immediately carried out. The grab bucket is attached to the side guide wall of the foundation pit and enters the groove, and the mechanical operation is stable. The slurry surface in the groove is lower than the guide wall surface by 0.3m, and at the same time, the slurry surface in the groove is higher than the ground water level by more than 0.5m, and the slurry is timely supplemented to maintain the stable slurry liquid level in the guide wall. Stopping digging when the grabbing and digging of the unit groove section reaches 0.5m above the elevation of the designed groove bottom, and cleaning the bottom to the designed elevation by using a grab bucket fine grabbing hole from one end to the other end when the whole groove reaches the elevation.

And (4) hanging the wall brushing device by a crane to brush the concrete wall of the joint of the groove section up and down so as to remove impurities on the concrete wall.

Fourthly, hoisting the framework structure;

the construction method specifically comprises the following steps:

4.1, vertically connecting all sections of the lattice column according to the design depth of the underground continuous wall;

4.2, vertically lowering the second latticed column 2 into the hole groove by using a small crane;

4.3, hanging the first latticed column 1, placing the first latticed column 1 to a designed elevation, enabling the first latticed column 1 to be close to the placed second latticed column 2, adjusting the direction and the position, inserting the first latticed column 1 into the insertion grooves 5 on the two sides of the second latticed column 2, and directly positioning and connecting;

4.4, repeating the steps 4.2 and 4.3, sequentially lowering the second lattice column 2 and the first lattice column 1, and finishing the setting of the framework structure.

Pouring underwater concrete 3;

in the embodiment, a guide pipe with the diameter of 250mm is selected from underwater concrete, the diameter of the guide pipe is 7-8 times of the particle size of coarse aggregate in the concrete according to the standard, the length of each section of guide pipe is 2-3 m, short pipes with the length of 1-1.5 m are arranged to adjust the length, and the distance between the guide pipes is controlled within 3 m. Before each pouring, a watertight test is carried out, the pressure is 1.0MPa, the pouring is a ball pressing method, two stirring trucks with the total capacity of 15.0m3 are used for simultaneously feeding, and the initial burial depth of the guide pipe can be ensured to be more than 1.0 m. Because the concrete supply strength is high and the rising speed of the concrete surface is more than 10m/h, the maximum buried depth of the guide pipe is about 6m, and the minimum buried depth is 2 m.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims (8)

1. Underground continuous wall of socket joint formula steel lattice skeleton, its characterized in that: the concrete frame comprises a framework structure and concrete (3), wherein the framework structure is formed by alternately arranging first lattice columns (1) and second lattice columns (2), and the first lattice columns (1) and the second lattice columns (2) are in socket joint connection;

the cross section of the first lattice column (1) is rectangular, and the first lattice column comprises a first end upright rod (11) positioned at the end corner of the four sides of the rectangle and a rectangular frame belt (12) arranged around the first end upright rod (11);

the transversal rectangle of personally submitting of second lattice column (2), including second end pole setting (21) that are located four sides extreme angle department with enclose and establish in second end pole setting (21) surrounding frame structure (22) all around, enclose rectangular frame area (12) one-to-one setting on frame structure (22) and first lattice column (1), constitute by a pair of short steel band (221) and a pair of long steel band (222), long steel band (222) set up the long limit one side in the cross section of second lattice column (2), the outside extension of the level after the both ends face is fixed with the lateral wall of the second end pole setting (21) of both sides, surpass the surface setting of short steel band (221), form inserting groove (5) between relative long steel band (222), first lattice column (1) cooperation is inserted and is established in inserting groove (5).

2. The underground diaphragm wall of a socket steel lattice framework of claim 1, wherein: the length directions of the cross sections of the first lattice column (1) and the second lattice column (2) are arranged along the extension direction of the underground continuous wall.

3. The underground diaphragm wall of a socket steel lattice framework of claim 1, wherein: the first end upright rod (11) is an angle steel and is oppositely buckled, and the rectangular frame belts (12) are arranged at intervals along the length direction of the first end upright rod (11).

4. The underground diaphragm wall of a socket steel lattice framework of claim 3, wherein: the distance between the upper rectangular frame strip and the lower rectangular frame strip (12) which are adjacent to each other is not more than 500mm, the rectangular frame strips (12) are formed by enclosing steel plate strips with the width of 180 mm and 210mm, and the steel plate strips are attached to the outer side faces of the first end upright rods (11) on the two sides and are welded and fixed.

5. The underground diaphragm wall of a socket steel lattice framework of claim 1, wherein: the middle parts of the first lattice column (1) and the second lattice column (2) are respectively provided with a supporting upright rod (4) which is oppositely arranged on a rectangular frame belt (12) parallel to the wall surface or an enclosing frame structure (22).

6. The underground diaphragm wall of a socket steel lattice framework of claim 5, wherein: the support upright stanchion (4) is vertically arranged angle steel, and a side limb plate is coplanar with the central axis of the first lattice column (1) or the second lattice column (2).

7. The underground diaphragm wall of a socket steel lattice framework of claim 1, wherein: adjacent from top to bottom connect through angle connection (6) between first lattice column (1), and angle connection (6) package is established in the outside of first end pole setting (11), and with first end pole setting (11) laminating setting to it is fixed through connecting bolt (7), and connecting bolt (7) pass angle connection (6) and first end pole setting (11) back in proper order and lock through the nut.

8. The underground diaphragm wall of a socket steel lattice framework of claim 1, wherein: and end sealing plates are arranged at the bottom ends of the end part vertical rods of the first lattice column (1) and the second lattice column (2) which are positioned at the bottom.

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