CN211395690U - Foundation pit supporting wall structure convenient to construct - Google Patents

Abstract

The utility model discloses a foundation ditch retaining wall structure of convenient construction, including setting up the retaining wall in the foundation ditch inboard, the retaining wall includes a plurality of wall units that set up side by side, the wall units includes the concatenation wallboard that two piece upper and lower reinforced concrete made at least, at last, be close to the edge between the concatenation wallboard of lower part and be equipped with elasticity and keep off the thick liquid rib, thereby enclose and connect the space, be equipped with the connecting block of making by the grout that excels in connecting the space, the vertical connecting rod that is equipped with a plurality of intervals setting is inlayed to concatenation wallboard up end at the lower part, the terminal surface corresponds the connecting rod position and is equipped with the butt joint blind hole under the concatenation wallboard on upper portion, the upper end that the connecting rod stretches out lower part concatenation wallboard is located the butt joint blind hole that corresponds, be equipped. The utility model discloses both can show ground promotion efficiency of construction, multiplicable compressive strength again to adapt to the strutting of the different degree of depth foundation ditch, and have good water-proof effects.

Description

Foundation pit supporting wall structure convenient to construct

Technical Field

The utility model relates to a building structure technical field, concretely relates to convenient excavation supporting wall structure of constructing.

Background

When a building with an underground layer is built, firstly a foundation pit needs to be excavated, a bottom plate is poured at the bottom of the foundation pit, and then a corresponding underground layer structure is built. The depth of a foundation pit is often dozens of meters, so the side wall of the foundation pit needs to be supported, a common foundation pit supporting method is to drill rows of deep holes around the edge of the foundation pit by using a drilling machine, to ensure that the adjacent deep holes are partially overlapped and communicated, then to fill cement slurry into the deep holes, so as to form a supporting wall, and then to dig out the earthwork of the foundation pit, wherein the supporting wall at the moment can avoid the collapse of the earthwork of the side wall of the foundation pit, can also avoid water seepage into the foundation pit, and is convenient for the construction in the foundation pit.

However, the supporting wall with such a structure has a problem of low compressive strength, and particularly when the depth of the foundation pit is deep, the supporting wall is difficult to play a reliable soil retaining role.

Therefore, a Chinese patent document discloses a foundation pit supporting composite retaining wall and a construction method thereof, wherein the publication number of the retaining wall is CN109914429A, and the retaining wall comprises a plurality of tubular piles which are circumferentially arranged; the cement retaining wall part is positioned between two adjacent tubular piles and connected with the tubular piles to form a circumferentially closed retaining wall; and a grouting structure corresponding to the cement-soil retaining wall part is arranged on the pipe wall of the pipe pile. The invention greatly improves the compression resistance and soil retaining effect of the retaining wall by arranging the canning between the cement soil retaining walls.

However, the following defects still exist in the foundation pit supporting wall structure: firstly, the supporting wall is of a cast-in-place structure, on one hand, the supporting wall needs a large construction site and influences the construction progress; on the other hand, the quality problems of mud clamping, skin sticking, pitted surface, exposed ribs, poor flatness, inaccurate position of the prefabricated part and the like of the wall body are easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the compressive strength that current excavation supporting wall structure exists is low, the retaining effect is poor and be difficult for control efficiency of construction and quality, providing a convenient excavation supporting wall structure of being under construction, both can show ground and promote the efficiency of construction, multiplicable compressive strength again to adapt to the strutting of the different degree of depth foundation ditch, and have good water-proof effects.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a foundation pit supporting wall structure convenient for construction comprises a supporting wall arranged on the inner side of a foundation pit, wherein the supporting wall comprises a plurality of wall units arranged side by side along the length direction, the wall units at least comprise spliced wallboards made of upper reinforced concrete and lower reinforced concrete, elastic grout blocking ribs which are abutted against the lower end face of the spliced wallboard at the upper part are arranged at the edges of the upper end face of the spliced wallboard at the lower part, thereby enclosing a connecting gap, a connecting block made of high-strength grouting material is arranged in the connecting gap, a plurality of vertical connecting rods arranged at intervals along the length direction are embedded on the upper end surface of the splicing wallboard at the lower part, the connecting rods are made of deformed steel bars, the lower end face of the splicing wallboard at the upper part is provided with a butt-joint blind hole corresponding to the connecting rod, the upper end of the connecting rod extending out of the splicing wallboard at the lower part is positioned in the corresponding butt-joint blind hole, a bonding body made of high-strength grouting material is arranged in a gap between the upper end of the connecting rod and the butt-joint blind hole.

Firstly, the utility model discloses a retaining wall is arranged side by side along length direction by a plurality of wall body unit and forms, and the wall body unit includes the concatenation wallboard that two piece upper and lower reinforced concrete made at least, thereby make whole retaining wall can become modular concatenation wallboard by the split, and then be convenient for adopt the prefabricated mode of mill to make in batches, can greatly improve the efficiency of construction, the compressive strength of retaining wall and the size precision of retaining wall, reduce the requirement to the construction site, the size of monolithic concatenation wallboard can be reduced simultaneously, so that the transportation is convenient, and the accessible forms the retaining wall of co-altitude in the different quantity concatenation of direction of height, in order to satisfy the needs of strutting of the different degree of depth foundation pits. Especially, the utility model discloses the concatenation wallboard up end in the lower part inlays and is equipped with a plurality of vertical connecting rods that adopt the screw-thread steel to make along the length direction interval setting, and the terminal surface corresponds the connecting rod position and sets up the butt joint blind hole under the concatenation wallboard on upper portion. When the upper and lower spliced wallboards are overlapped together, the upper end of the connecting rod enters the butt-joint blind hole, the high-strength grouting material is poured into the butt-joint blind hole, and after the high-strength grouting material is solidified, a high-strength bonding body can be formed in a gap between the butt-joint blind holes of the connecting rod, so that the upper and lower spliced wallboards are reliably connected together. Furthermore, the utility model discloses be equipped with the elasticity that encloses into the round and keep off the thick liquid rib near the edge at the concatenation wallboard up end of lower part, we can fill the grout that excels in keeping off the contained edge that the thick liquid rib formed, when the concatenation wallboard superpose on upper portion to the concatenation wallboard of lower part, can enclose into flat connection space between upper and lower part concatenation wallboard and fender thick liquid rib. Rely on the weight effect of upper portion concatenation wallboard, make and keep off the thick liquid rib and receive the extrusion and closely lean on terminal surface under the concatenation wallboard on upper portion, the joint space is flattened this moment, and its inside high-strength grout material can fully be connected the space to fully combine with the lower terminal surface of upper portion concatenation wallboard. After the high-strength grouting material is cured, a high-strength connecting block can be formed in the connecting gap, the upper and lower spliced wallboards can be connected into a whole, the effective sealing of the splicing positions of the upper and lower spliced wallboards can be realized, and the water seepage phenomenon at the splicing positions is avoided.

It can be understood that the connecting rods made of the deformed steel bars are beneficial to improving the connecting strength between the connecting rods and the spliced wall plate and between the connecting rods and the bonding body, and the connecting rods are prevented from being separated from each other when stressed. Particularly, the spliced wallboard made of reinforced concrete has extremely high compressive strength, bending strength and shearing strength, and the connecting rod made of deformed steel bar can enable the spliced wallboard at the upper part and the lower part to form extremely high shearing strength at the spliced part, so that the spliced wallboard at the upper part and the lower part is prevented from being dislocated at the spliced part due to extrusion. Because the splicing surfaces of the upper and lower splicing wall boards are approximately rectangular, and the connecting rod can be arranged in the middle position of the width direction of the splicing surfaces, when the spliced wall units are subjected to lateral extrusion force of earth and stone of the outer side foundation pit, on one hand, the upper splicing wall board is subjected to inward extrusion force, so that the connecting rod is subjected to a shearing force at the splicing surfaces of the upper and lower splicing wall boards; on the other hand, the upper splicing wall body is subjected to bending moment which is inwards bent relative to the lower splicing wall body, at the moment, the inner side edges of the splicing surfaces of the upper and lower splicing wall boards form a fulcrum, and the connecting rod is subjected to pulling force. It is known that connecting rods made of deformed steel have a very high shear and tensile strength, so that several connecting rods arranged between the upper and lower spliced wall panels ensure a sufficient shear and bending strength of the wall element at the splice.

It should be noted that the grout blocking ribs can be made of rubber so as to have certain elasticity, so that a sealed connecting gap can be formed, the leakage of the high-strength grouting material filled in the connecting gap is avoided, and meanwhile, effective sealing can be formed at the splicing position of the upper and lower spliced wallboard. Particularly, the lower end surface of the upper spliced wallboard and the upper end surface of the lower spliced wallboard can be roughened to form rough surfaces and coated with an interface agent, so that the binding force and the connection strength of the connecting block and the upper and lower spliced wallboards are greatly increased. In addition, the connecting rod can be pre-buried in the concatenation wallboard of lower part, can adopt tenon fourth of the twelve earthly branches structure to combine the grout material that excels in to connect between the adjacent wall body unit to form integrative enclosure.

Preferably, a grouting hole transversely penetrating through the lower part of the butt joint blind hole and a grout outlet penetrating through the top of the butt joint blind hole are formed in the inner side wall of the spliced wallboard at the upper part.

The utility model discloses be equipped with grout outlet and the grout hole of arranging from top to bottom on the concatenation wallboard inside wall on upper portion. When the splicing wall plate on the upper portion is superposed on the splicing wall plate on the lower portion, the upper end of the connecting rod enters the butt-joint blind hole, at the moment, high-strength grouting materials can be poured into the butt-joint blind hole communicated with the grouting hole from the grouting hole on the lower portion through the grouting machine, the high-strength grouting materials gradually rise from bottom to top in the butt-joint blind hole until the high-strength grouting materials flow out from the grout outlet hole on the upper portion, and therefore the fact that the high-strength grouting materials are full of the butt-joint blind hole can be shown, and pouring. After the high-strength grouting material in the butt-joint blind hole is solidified, the upper and lower spliced wall boards can be connected together through the connecting piece. Particularly, the high-strength grouting material is gradually filled in the butt blind hole from bottom to top, so that the high-strength grouting material in the butt blind hole can be fully filled, a cavity is avoided, and the connection strength of a bonding body formed by the high-strength grouting material is increased.

Preferably, the lower end of the connecting rod is provided with a transverse reinforcing rod.

Because the connecting rod connects into the font of falling T with the stiffener of lower extreme, can show the cohesion that promotes connecting rod and lower part concatenation wallboard, avoid the connecting rod to take out from lower part concatenation wallboard.

Preferably, the middle part cover of connecting rod is equipped with the uide bushing, the upper and lower both ends of uide bushing inlay respectively and establish in the concatenation wallboard of upper and lower part.

It can be understood that when the wall unit is subjected to lateral extrusion force, the upper part and the lower part of the connecting rod are embedded in the spliced wall boards, so that the connecting rod at the splicing surfaces of the spliced wall boards at the upper part and the lower part can be the weakest position of the shear strength and the bending strength. The utility model discloses the middle part cover at the connecting rod is equipped with the boss, and the boss can regard as prefabricated component and connecting rod pre-buried in the concatenation wallboard of lower part together, and when the concatenation wallboard of upper and lower part splices each other, the upper and lower both ends of boss inlay respectively and establish in the concatenation wallboard of upper and lower part to greatly improve the connecting rod at the anti shear strength and the bending strength of concatenation face department at upper and lower part concatenation wallboard. Particularly, the sleeve joint structure of the reinforcing sleeve and the connecting rod greatly facilitates the processing and the manufacturing of the connecting rod and is beneficial to saving materials.

Preferably, the butt-joint blind hole is a threaded hole.

Because the butt joint blind hole is the screw hole that has the internal thread, consequently, can greatly increase the bonding strength of bonding body and screw thread blind hole, avoid bonding the body to deviate from in the screw thread blind hole.

Preferably, four corners of the lower end surface of the upper spliced wallboard and four corners of the upper end surface of the lower spliced wallboard are respectively provided with a steel cushion block, the cushion blocks on the upper spliced wallboard and the lower spliced wallboard are attached to each other, and the sum of the heights of the upper cushion block and the lower cushion block is lower than the initial height of the grout blocking ribs.

It can be understood that, on one hand, the upper and lower end faces of the spliced wall body made of reinforced concrete are difficult to be completely flat and vertical relative to the side faces, and on the other hand, the elastic grout blocking ribs are compressed and deformed after being stressed. Therefore, when the upper and lower spliced wall panels are folded together, it is difficult to ensure the sidewalls of the upper and lower spliced wall panels to be flat and consistent. The utility model discloses four edges of terminal surface and four edges of concatenation wallboard up end of lower part are equipped with the steel cushion respectively under the concatenation wallboard on upper portion, and when upper and lower part concatenation wallboard coincide was in the same place, the cushion on the concatenation wallboard of upper and lower part pasted each other and leans on and constitute the concatenation face. Because the cushion block formed by machining has extremely high dimensional accuracy, the verticality between the splicing surface and the side wall of the spliced wallboard can be ensured, and the flatness and the consistency of the side walls of the spliced wallboard at the upper part and the lower part are further ensured. Because the height of the overlapped upper cushion block and the lower cushion block is lower than the initial height of the grout blocking ribs, when the upper spliced wallboard and the lower spliced wallboard are overlapped together, the grout blocking ribs are firstly contacted with the lower end face of the upper spliced wallboard and are compressed until the cushion blocks on the upper spliced wallboard and the lower spliced wallboard are mutually attached and positioned, on one hand, the compressed grout blocking ribs can form sealed connecting gaps, and on the other hand, the upper cushion block and the lower cushion block which are mutually attached can keep the side walls of the wall body units to be flat and consistent.

Preferably, the cushion block comprises a fixed block embedded in the spliced wallboard, a reference block arranged on the fixed block and an adjusting sheet superposed on the reference block, the adjusting sheet is provided with a screw counter bore, the reference block is provided with a coaxial screw through hole, the fixed block is provided with a coaxial screw hole, and the screw counter bore of the adjusting sheet is internally provided with a counter screw in threaded connection with the screw hole of the fixed block.

The utility model discloses a cushion includes fixed block, reference block and adjustment sheet, and fixed block wherein is pre-buried in the concatenation wallboard, and the adjustment sheet then can have the thickness of multiple difference for the selection. Before the wallboard needs to be spliced at the upper part and the lower part in a superposed mode, the surfaces of the cushion blocks at the four corners can be detected to be coplanar, and particularly, the verticality between a splicing surface formed by the four cushion blocks and the side wall of the spliced wallboard is detected. Because the embedded depth of the fixed block and other dimensions are easy to generate errors, the thickness of the adjusting sheet on the cushion block can be adjusted to ensure that the surfaces of the cushion blocks at the four corners are coplanar, and the splicing surface formed by the four cushion blocks is perpendicular to the side wall of the spliced wallboard, so that the side wall of the spliced wall unit is smooth and consistent.

In addition, the adjusting sheet is provided with a screw counter bore, and the screw for connecting the adjusting sheet, the reference block and the fixed block is a countersunk screw, so that the surface of the adjusting sheet is ensured not to be bulged, and the upper cushion block and the lower cushion block are ensured to be attached to each other. The reference block with the fixed thickness is beneficial to reducing the thickness of the adjusting sheet, so that the adjusting sheet level difference with different thicknesses can be conveniently formed, and the thickness of the cushion block can meet the requirements of different occasions.

Preferably, sealing glue is arranged at the opening of the splicing gap of the splicing wall boards at the upper part and the lower part.

When the upper and lower spliced wallboards are spliced together, sealant can be coated at the opening of the splicing gap of the upper and lower spliced wallboards, so that the waterproof performance of the wall units at the splicing surface is further improved, and the water seepage phenomenon of a supporting wall is avoided.

Therefore, the utility model discloses following beneficial effect has: the construction efficiency can be obviously improved, and the compressive strength can be increased, so that the support is suitable for supporting foundation pits of different depths, and a good waterproof effect is achieved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of a structure of the spacer.

In the figure: 1. the wall body unit 11, the splicing wall plate 111, the grout blocking ribs 12, the connecting blocks 13, the connecting rods 131, the reinforcing rods 14, the butt joint blind holes 141, the grout outlet holes 142, the grouting holes 143, the plugs 15, the bonding bodies 16, the reinforcing sleeves 2, the cushion blocks 21, the fixing blocks 22, the reference blocks 23, the adjusting pieces 3, the countersunk head screws 4, the sealant 5 and the grout overflow grooves.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

As shown in figure 1, a convenient foundation ditch retaining wall structure of being under construction, including setting up the retaining wall in the foundation ditch inboard, the retaining wall includes a plurality of wall units 1 that set up side by side along length direction, wall units include two piece upper and lower spliced wallboard 11 that reinforced concrete made at least, thereby make whole retaining wall can be split into a plurality of modular spliced wallboard, and then be convenient for adopt the prefabricated mode batch manufacturing of mill, can greatly improve the efficiency of construction, the compressive strength of retaining wall and the size precision of retaining wall, reduce the requirement to the construction site, can reduce the size of monolithic spliced wallboard simultaneously, in order to facilitate the transportation, and the accessible forms the retaining wall of co-altitude in the different quantity concatenations of direction of height, in order to satisfy the strut demand of the different degree of depth foundation ditch.

In addition, the concatenation wallboard up end of lower part is close to the edge and sets up to inlay and establishes the annular, sets up in inlaying and establishes the annular and keeps off thick liquid rib 111, keeps off thick liquid rib and adopts rubber to make to keep off thick liquid rib and lean on terminal surface under the concatenation wallboard on upper portion elastically, and enclose into flat connection space between upper and lower part concatenation wallboard and the fender thick liquid rib, fill the grout that excels in the connection space. During construction, can fill the grout material that excels in the region that the fender thick liquid rib encloses on the concatenation wallboard of lower part earlier, then with the concatenation wallboard superpose of upper portion to the concatenation wallboard of lower part on, rely on the action of gravity of upper portion concatenation wallboard, make the fender thick liquid rib receive the extrusion and closely lean on terminal surface under the concatenation wallboard on upper portion, the connection space is flattened this moment, the connection space can be filled completely to its inside high-strength grout material to fully combine with the lower terminal surface of upper portion concatenation wallboard. After the high-strength grouting material is cured, the high-strength connecting blocks 12 can be formed in the connecting gaps, the upper and lower spliced wallboards can be reliably connected into a whole, the effective sealing of the splicing positions of the upper and lower spliced wallboards can be realized, and the water seepage phenomenon at the splicing positions is avoided.

It should be noted that the upper and lower splice wall panels in this embodiment are determined according to their respective relative positions in the wall unit, for example, when the wall unit includes three splice wall panels, the uppermost splice wall panel is determined as the upper splice wall panel, the lowermost splice wall panel is determined as the lower splice wall panel, and the middle splice wall panel is determined as the lower splice wall panel with respect to the uppermost splice wall panel and the upper splice wall panel with respect to the lowermost splice wall panel.

In order to ensure the reliable connection of the connecting blocks and the spliced wall boards, rough surfaces can be formed on the lower end surface of the upper spliced wall board and the upper end surface of the lower spliced wall board by adopting modes of roughening treatment and the like, and an interface agent is coated, so that the binding force and the connecting strength of the connecting blocks and the upper and lower spliced wall boards are greatly increased. And adjacent wall units can be connected by adopting a mortise and tenon structure and combining high-strength grouting material, so that an integrated supporting wall is formed.

In addition, the high-strength grouting material is prepared by taking a high-strength material as an aggregate, taking cement as a bonding agent and assisting materials with high flow state, micro-expansion, segregation prevention and the like. Adding a certain amount of water in a construction site, and uniformly stirring for use. The interface agent is used for treating the surface of an object, the treatment can be adsorption or coating of physical action and often is physical and chemical action, the purpose is to improve or completely change the physical and technical properties and surface chemical characteristics of the surface of the material, and the interface agent is suitable for pretreatment of base layer interfaces of concrete, aerated concrete, small-sized building blocks, light partition walls, brick-concrete wall surfaces, putty scraping, tile bonding, masonry back coating, thermal insulation boards and the like, and radioactive chain type anchoring effect is generated through bidirectional permeation bonding to permanently and firmly bond bidirectional materials together. Since the high-strength grouting material and the interfacial agent are commercially available products of the prior art, they will not be described herein too much.

In addition, a plurality of vertical connecting rods 13 arranged at intervals along the length direction can be embedded in the upper end face of the spliced wallboard at the lower part, the lower parts of the connecting rods are arranged in the middle of the width direction of the upper end face in an embedded mode, the upper parts of the connecting rods are exposed out of the upper end face of the spliced wallboard, the connecting rods are made of deformed steel bars with the diameter of more than or equal to 16mm and the mark of HRB400, and the distance between every two adjacent connecting rods is less than or equal to 400 mm. Correspondingly, the butt joint blind hole 14 is arranged at the position, corresponding to the connecting rod, of the lower end face of the upper spliced wallboard, the aperture of the butt joint blind hole is at least 30mm larger than the diameter of the connecting rod, so that when the upper spliced wallboard and the lower spliced wallboard are overlapped together, the connecting rod stretches out of the upper end of the lower spliced wallboard and can conveniently enter the butt joint blind hole of the upper spliced wallboard, and high-strength grouting material is poured in a gap between the upper end of the connecting rod and the butt joint blind hole. After the high-strength grouting material is cured, a bonding body 15 for connecting the upper splicing wall board and the connecting rod is formed, so that the upper splicing wall board and the lower splicing wall board are reliably connected together.

In order to fill high-strength grouting material into the butt-joint blind holes conveniently, grouting holes 142 transversely penetrating through the lower portions of the butt-joint blind holes and grout outlet holes 141 transversely penetrating through the tops of the butt-joint blind holes can be formed in the inner side walls of the splicing wall boards on the upper portions.

When the splicing wall plate on the upper portion is superposed on the splicing wall plate on the lower portion, the upper end of the connecting rod enters the butt-joint blind hole, at the moment, high-strength grouting materials can be poured into the butt-joint blind hole communicated with the grouting hole from the grouting hole on the lower portion through the grouting machine, the high-strength grouting materials gradually rise from bottom to top in the butt-joint blind hole until the high-strength grouting materials flow out from the grout outlet hole on the upper portion, and therefore the fact that the high-strength grouting materials are filled in the butt-joint blind hole can be shown, and pouring is. After the high-strength grouting material in the butt-joint blind hole is solidified, the upper and lower spliced wall boards can be connected together through the connecting piece.

Preferably, a plug 143 is arranged at the opening of the slurry outlet at the upper part, so as to plug the lower part of the opening of the slurry outlet, thereby minimizing the opening of the slurry outlet. When the high-strength grouting material is poured into the butt-joint blind hole communicated with the grouting hole from the grouting hole at the lower part, the high-strength grouting material gradually rises from bottom to top in the butt-joint blind hole until the butt-joint blind hole is filled, the high-strength grouting material enters the grout outlet at the upper part, and when the high-strength grouting material is filled into the grout outlet at the upper part, a small amount of high-strength grouting material can flow outwards from the opening of the narrowed grout outlet, so that the pouring state of the high-strength grouting material in the butt-joint blind hole can be conveniently confirmed, and the grout outlet can be filled with the high-strength grouting material. Therefore, when the high-strength grouting material in the butt-joint blind hole is solidified, the connecting block can be connected with the high-strength grouting material solidified in the grout outlet hole and the grout outlet hole into a whole, and the bonding strength of the connecting block and the spliced wallboard is greatly improved.

Furthermore, a transverse reinforcing rod 131 can be welded at the lower end of the connecting rod, so that the connecting rod and the reinforcing rod at the lower end are connected into an inverted T shape, the bonding force of the connecting rod and the lower spliced wallboard can be remarkably improved, and the connecting rod is prevented from being pulled out from the lower spliced wallboard.

Furthermore, a reinforcing sleeve 16 in a regular hexagonal prism shape can be sleeved in the middle of the splicing surface on the connecting rod, the reinforcing sleeve is pre-embedded in the splicing wall board at the lower part together with the connecting rod as a prefabricated part, and when the splicing wall boards at the upper part and the lower part are spliced together, the upper end of the reinforcing sleeve is embedded in the bonding body of the splicing wall board at the upper part.

When the wall units receive the extrusion force of the earthwork of the outer side foundation pit, the upper part and the lower part of the connecting rod are embedded in the spliced wallboard, so that the connecting rod at the splicing surface of the spliced wallboard of the upper part and the lower part can be the weakest position of the shear strength and the bending strength. The reinforcing sleeve can greatly improve the shear strength and the bending strength of the connecting rod at the splicing surfaces of the upper and lower spliced wall boards. Particularly, the sleeve joint structure of the reinforcing sleeve and the connecting rod greatly facilitates the processing and the manufacturing of the connecting rod and is beneficial to saving materials. Of course, the upper end and the lower end of the reinforcing sleeve can be provided with integrated flanges so as to fully increase the connecting strength of the reinforcing sleeve, the spliced wallboard and the bonding body.

In addition, the middle position of the lower end face of the upper splicing wallboard can be provided with a slurry overflow groove 5, and all butt joint blind holes of the upper splicing wallboard are arranged on the bottom face of the slurry overflow groove. When high-strength grouting materials are poured into the butt-joint blind holes through the grouting holes, part of the high-strength grouting materials enter the grout overflow grooves, so that the high-strength grouting materials in the butt-joint blind holes, the grout overflow grooves and the grout blocking ribs are combined into a whole and finally solidified into a whole structure, the connecting strength between the upper and lower spliced wall boards can be effectively improved, and the shearing strength and the bending strength of the upper and lower spliced wall boards at the splicing positions can be increased.

In order to increase the connection strength of the bonding body and the butt blind hole, the butt blind hole can be set to be a threaded hole, so that the bonding strength of the bonding body and the threaded blind hole is greatly increased, and the bonding body is prevented from being separated from the threaded blind hole.

As a preferred scheme, as shown in fig. 2, steel cushion blocks 2 are respectively disposed at four corners of the lower end surface of the upper spliced wallboard and four corners of the upper end surface of the lower spliced wallboard, when the upper spliced wallboard and the lower spliced wallboard are overlapped together, the cushion blocks on the upper spliced wallboard and the lower spliced wallboard are mutually attached to form a spliced surface, so that a connection gap with a fixed height is formed between the upper spliced wallboard and the lower spliced wallboard, and at the moment, the elastic grout blocking ribs are compressed and deformed after being pressed. Because the cushion block formed by machining has extremely high dimensional accuracy, the verticality between the splicing surface and the side wall of the spliced wallboard can be ensured, and the flatness and the consistency of the side walls of the spliced wallboard at the upper part and the lower part are further ensured.

Preferably, the cushion block comprises a fixed block 21 embedded in the splicing wall board, a reference block 22 arranged on the fixed block and an adjusting sheet 23 superposed on the reference block, wherein a screw counter bore is arranged on the adjusting sheet, a coaxial screw through hole is arranged on the reference block, a coaxial threaded hole is arranged on the fixed block, and a counter screw 3 in threaded connection with the threaded hole of the fixed block is arranged in the screw counter bore of the adjusting sheet, so that the fixed block, the reference block and the adjusting sheet are connected into the cushion block. When the thickness of the adjusting sheet is changed, the thickness of the cushion block can be conveniently changed.

When the wall boards are spliced on the upper portion and the lower portion of the wall units to be overlapped, the thickness of the adjusting pieces on the cushion blocks can be adjusted, the surfaces of the cushion blocks at the four corners are coplanar, the splicing surfaces formed by the four cushion blocks are perpendicular to the side walls of the spliced wall boards, and the side walls of the spliced wall units are smooth and consistent. Of course, various thickness specifications of the adjusting sheet can be prepared to conveniently adjust the height of the cushion block.

Finally, the sealant 4 can be coated at the opening of the splicing gap of the spliced upper and lower wall boards, so that the waterproof performance of the wall units at the splicing surface is further improved, and the water seepage phenomenon of the supporting wall is avoided.

Claims (8)

1. A foundation pit supporting wall structure convenient for construction comprises a supporting wall arranged at the inner side of a foundation pit, it is characterized in that the supporting wall comprises a plurality of wall units which are arranged side by side along the length direction, the wall units at least comprise spliced wallboards made of upper reinforced concrete and lower reinforced concrete, elastic grout blocking ribs which are abutted against the lower end face of the spliced wallboard at the upper part are arranged at the edges of the upper end face of the spliced wallboard at the lower part, thereby enclosing a connecting gap, a connecting block made of high-strength grouting material is arranged in the connecting gap, a plurality of vertical connecting rods arranged at intervals along the length direction are embedded on the upper end surface of the splicing wallboard at the lower part, the connecting rods are made of deformed steel bars, the lower end face of the splicing wallboard at the upper part is provided with a butt-joint blind hole corresponding to the connecting rod, the upper end of the connecting rod extending out of the splicing wallboard at the lower part is positioned in the corresponding butt-joint blind hole, a bonding body made of high-strength grouting material is arranged in a gap between the upper end of the connecting rod and the butt-joint blind hole.

2. The foundation pit supporting wall structure convenient for construction according to claim 1, wherein a grout hole transversely penetrating the lower portion of the butt blind hole and a grout outlet penetrating the top of the butt blind hole are formed in the inner side wall of the spliced wall panel at the upper portion.

3. A supporting wall structure for foundation pit for facilitating construction according to claim 2, wherein the lower end of the connecting rod is provided with a transverse reinforcing rod.

4. The foundation pit supporting wall structure convenient for construction according to claim 3, wherein the middle part of the connecting rod is sleeved with a reinforcing sleeve, and the upper end and the lower end of the reinforcing sleeve are embedded in the splicing wall boards at the upper part and the lower part respectively.

5. The foundation pit supporting wall structure convenient for construction according to claim 1, wherein the butt blind hole is a threaded hole.

6. The easy-to-construct foundation pit supporting wall structure according to claim 1, wherein steel pads are respectively disposed at four corners of the lower end surface of the upper spliced wall board and four corners of the upper end surface of the lower spliced wall board, the pads of the upper and lower spliced wall boards are attached to each other, and the sum of the heights of the upper and lower pads is lower than the initial height of the grout blocking bars.

7. The foundation pit supporting wall structure convenient for construction according to claim 6, wherein the cushion block comprises a fixed block embedded in the spliced wall board, a reference block arranged on the fixed block, and an adjusting sheet superposed on the reference block, the adjusting sheet is provided with a screw counter bore, the reference block is provided with a coaxial screw through hole, the fixed block is provided with a coaxial threaded hole, and the adjusting sheet is provided with a counter screw in threaded connection with the threaded hole of the fixed block in the screw counter bore.

8. The structure of a supporting wall for a foundation pit according to claim 1, wherein a sealant is provided at the opening of the splicing gap of the upper and lower splicing wall plates.

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